Error CH03

[pavolholes]

Hi, I bought four pieces of hardware-tiny from one community member and I've connected it to the:
Outdoor unit multi split: LG MU2R15.U13
Indoor units: LG H09S1DA.NS1 and LG H12S1D.NS1

Logs are from the H09S1DA.NS1. The other unit (H12S1D.NS1) connected to the same outdoor unit is now communicating with the other ESPHome controller without any issues.
I have the same configuration of the units twice but the other two hardware-tiny seems to have hardware issue with TJA1027 so I'm waiting for to replace it.

After some time the indoor unit goes into CH03 error and stops communicating with the controller. Then I can't do anything with the unit to fix that:

• it doesn't respond to the IR remote controller
• it doesn't respond to commands from the esphome controller
• it doesn't respond to the power button on the unit.
  I have to turn of the circuit breaker for the outdoor unit to hard-reboot the indoor unit then it communicates with the ESPHome controller without any issues for some time.
  Note: I don't have any other wired controller than this ESPHome and IR remote controll.

Screenshot from yesterday when it happened:

Attached is the Debug log from current time. I don't have a log from time when that happened (yesterday 14:12). If the log from exact time when that happens is needed I can try to start the syslog and collect the logs from controller there.

20250617-logs_pracovna-klima_logs.txt

These lines are repeating now:

[08:41:56][D][lg-controller:1358]: update
[08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13)
[08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13)
[08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13)
[08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13)
[08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13)
[08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13)
[08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13)
[08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13)
[08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13)
[08:42:02][D][lg-controller:1358]: update

Configuration validation (I'm using a lot of includes so this is the combined result):

INFO ESPHome 2025.5.1
INFO Reading configuration /config/pracovna-klima.yaml...
INFO Updating https://github.com/JanM321/esphome-lg-controller.git@None
INFO Detected timezone 'Europe/Bratislava'
substitutions:
  common_comment: Common v0.10
  common_deviceSpecific_comment: lg_airconditioner v0.1
  temperature_sensor_entity_id: sensor.pracovna_multisenzor_temperature
  fahrenheit: 'false'
  is_slave_controller: 'false'
  device_name: pracovna-klima
  friendly_name: Pracovna Klima
  room: Pracovna
  project_name: pavolholes.Pracovna Klima
  project_version: '0.1'
  device_type: ESP32 WROOM
  i2c_sda: GPIO22
  i2c_scl: GPIO21
  uart_ld2410_tx: GPIO17
  uart_ld2410_rx: GPIO16
esphome:
  name: pracovna-klima
  friendly_name: Pracovna Klima
  comment: ESP32 WROOM | lg_airconditioner v0.1 | Common v0.10
  project:
    name: pavolholes.Pracovna Klima
    version: '0.1'
  min_version: 2025.5.1
  build_path: build/pracovna-klima
  area: ''
  platformio_options: {}
  includes: []
  libraries: []
  name_add_mac_suffix: false
  debug_scheduler: false
esp32:
  board: nodemcu-32s
  framework:
    version: 5.1.6
    sdkconfig_options: {}
    advanced:
      ignore_efuse_custom_mac: false
    components: []
    platform_version: https://github.com/pioarduino/platform-espressif32.git#51.03.07
    source: pioarduino/framework-espidf@https://github.com/pioarduino/esp-idf/releases/download/v5.1.6/esp-idf-v5.1.6.zip
    type: esp-idf
  flash_size: 4MB
  variant: ESP32
  cpu_frequency: 160MHZ
wifi:
  fast_connect: true
  reboot_timeout: 1h
  ap:
    ssid: AP
    password: <REDACTED>
    ap_timeout: 1min
  on_connect:
    then:
    - logger.log:
        format: '[WIFI] Connected to wifi.'
        level: INFO
        tag: main
        args: []
  on_disconnect:
    then:
    - logger.log:
        format: '[WIFI] Disconneted from wifi.'
        level: WARN
        tag: main
        args: []
  manual_ip:
    static_ip: 192.168.2.231
    gateway: 192.168.2.1
    subnet: 255.255.255.0
    dns1: 0.0.0.0
    dns2: 0.0.0.0
  domain: .local
  power_save_mode: LIGHT
  enable_btm: false
  enable_rrm: false
  passive_scan: false
  enable_on_boot: true
  networks:
  - ssid: PI_NoT
    password: <REDACTED>
    priority: 0.0
  use_address: 192.168.2.231
api:
  reboot_timeout: 1h
  encryption:
    key: <REDACTED>
  on_client_connected:
    then:
    - logger.log:
        format: '[API] Client [%s] connected to API with IP [%s]'
        level: INFO
        args:
        - !lambda |-
          client_info.c_str()
        - !lambda |-
          client_address.c_str()
        tag: main
  on_client_disconnected:
    then:
    - logger.log:
        format: API client disconnected!
        level: WARN
        tag: main
        args: []
  port: 6053
  password: ''
ota:
- platform: esphome
  password: <REDACTED>
  version: 2
  port: 3232
safe_mode:
  num_attempts: 5
  reboot_timeout: 10min
  boot_is_good_after: 1min
  disabled: false
time:
- platform: sntp
  id: sntp_time
  servers:
  - 192.168.2.20
  timezone: CET-1CEST,M3.5.0,M10.5.0/3
  update_interval: 15min
sun:
  latitude: 48.2700039
  longitude: 17.4762098
logger:
  level: VERY_VERBOSE
  logs:
    json: INFO
    sensor: INFO
    sensor.filter: INFO
    adc: INFO
    ntc: INFO
    resistance: INFO
    text_sensor: INFO
    api: INFO
    api.service: INFO
    api.connection: INFO
    ledc: INFO
    internal_temperature: INFO
    esp32.preferences: INFO
    esp32_ble_tracker: INFO
    esp32_ble: INFO
    bluetooth_proxy: INFO
    i2c: INFO
    i2c.idf: INFO
    ld2410: INFO
    bh1750.sensor: INFO
  baud_rate: 115200
  tx_buffer_size: 512
  deassert_rts_dtr: false
  task_log_buffer_size: 768
  hardware_uart: UART0
text_sensor:
- platform: version
  name: Version
  disabled_by_default: false
  icon: mdi:new-box
  entity_category: diagnostic
  hide_timestamp: false
- platform: wifi_info
  ip_address:
    name: IP
    disabled_by_default: false
    entity_category: diagnostic
    update_interval: 1s
  ssid:
    name: SSID
    disabled_by_default: false
    entity_category: diagnostic
    update_interval: 1s
binary_sensor:
- platform: status
  device_class: connectivity
  name: Status
  disabled_by_default: false
  entity_category: diagnostic
sensor:
- platform: wifi_signal
  name: WiFi Signal
  update_interval: 60s
  disabled_by_default: false
  force_update: false
  unit_of_measurement: dBm
  accuracy_decimals: 0
  device_class: signal_strength
  state_class: measurement
  entity_category: diagnostic
- platform: uptime
  id: sensor_uptime_timestamp
  name: Uptime
  disabled_by_default: false
  force_update: false
  icon: mdi:timer-outline
  accuracy_decimals: 0
  device_class: timestamp
  entity_category: diagnostic
  type: timestamp
- platform: internal_temperature
  name: Internal Temperature
  disabled_by_default: false
  force_update: false
  unit_of_measurement: °C
  accuracy_decimals: 1
  device_class: temperature
  state_class: measurement
  entity_category: diagnostic
  update_interval: 60s
- platform: homeassistant
  id: temp_sensor
  internal: true
  entity_id: sensor.pracovna_multisenzor_temperature
  disabled_by_default: false
  force_update: false
  accuracy_decimals: 1
  name: temp_sensor
button:
- platform: restart
  name: Restart
  disabled_by_default: false
  icon: mdi:restart
  entity_category: config
  device_class: restart
status_led:
  pin:
    number: 2
    ignore_strapping_warning: true
    mode:
      output: true
      input: false
      open_drain: false
      pullup: false
      pulldown: false
    inverted: false
    ignore_pin_validation_error: false
    drive_strength: 20.0
bluetooth_proxy:
  active: true
  cache_services: true
  connection_slots: 3
  connections:
  - {}
  - {}
  - {}
esp32_ble_tracker:
  scan_parameters:
    active: true
    duration: 5min
    interval: 320ms
    window: 30ms
    continuous: true
  max_connections: 3
  software_coexistence: true
external_components:
- source:
    url: https://github.com/JanM321/esphome-lg-controller.git
    type: git
  refresh: 1min
  components:
  - lg_controller
uart:
- id: ac_serial
  tx_pin:
    number: 25
    mode:
      output: true
      input: false
      open_drain: false
      pullup: false
      pulldown: false
    inverted: false
    ignore_pin_validation_error: false
    ignore_strapping_warning: false
    drive_strength: 20.0
  rx_pin:
    number: 26
    allow_other_uses: true
    mode:
      input: true
      output: false
      open_drain: false
      pullup: false
      pulldown: false
    inverted: false
    ignore_pin_validation_error: false
    ignore_strapping_warning: false
    drive_strength: 20.0
  baud_rate: 104
  rx_buffer_size: 256
  stop_bits: 1
  data_bits: 8
  parity: NONE
climate:
- platform: lg_controller
  name: ''
  uart_id: ac_serial
  rx_pin:
    number: 26
    allow_other_uses: true
    mode:
      input: true
      output: false
      open_drain: false
      pullup: false
      pulldown: false
    inverted: false
    ignore_pin_validation_error: false
    ignore_strapping_warning: false
    drive_strength: 20.0
  fahrenheit: false
  is_slave_controller: false
  temperature_sensor: temp_sensor
  vane1:
    name: Airflow 1 Up/Down
    id: vane_position_1
    icon: mdi:arrow-up-down
    disabled_by_default: false
  vane2:
    name: Airflow 2 Up/Down
    id: vane_position_2
    icon: mdi:arrow-up-down
    disabled_by_default: false
  vane3:
    name: Airflow 3 Up/Down
    id: vane_position_3
    icon: mdi:arrow-up-down
    disabled_by_default: false
  vane4:
    name: Airflow 4 Up/Down
    id: vane_position_4
    icon: mdi:arrow-up-down
    disabled_by_default: false
  overheating:
    name: Over Heating
    id: overheating
    icon: mdi:heating-coil
    disabled_by_default: false
  fan_speed_slow:
    name: Fan Speed Slow
    id: fan_speed_slow
    icon: mdi:fan-chevron-down
    mode: BOX
    disabled_by_default: false
  fan_speed_low:
    name: Fan Speed Low
    id: fan_speed_low
    icon: mdi:fan-speed-1
    mode: BOX
    disabled_by_default: false
  fan_speed_medium:
    name: Fan Speed Medium
    id: fan_speed_medium
    icon: mdi:fan-speed-2
    mode: BOX
    disabled_by_default: false
  fan_speed_high:
    name: Fan Speed High
    id: fan_speed_high
    icon: mdi:fan-speed-3
    mode: BOX
    disabled_by_default: false
  sleep_timer:
    name: Sleep Timer (minutes)
    id: sleep_timer
    icon: mdi:timer-outline
    mode: BOX
    disabled_by_default: false
  error_code:
    name: Error Code
    id: error_code
    icon: mdi:alert-circle-outline
    disabled_by_default: false
    force_update: false
  pipe_temp_in:
    name: Pipe Temperature In
    id: pipe_temperature_in
    icon: mdi:thermometer
    unit_of_measurement: °C
    disabled_by_default: false
    force_update: false
  pipe_temp_mid:
    name: Pipe Temperature Mid
    id: pipe_temperature_mid
    icon: mdi:thermometer
    unit_of_measurement: °C
    disabled_by_default: false
    force_update: false
  pipe_temp_out:
    name: Pipe Temperature Out
    id: pipe_temperature_out
    icon: mdi:thermometer
    unit_of_measurement: °C
    disabled_by_default: false
    force_update: false
  defrost:
    name: Defrost
    id: defrost
    icon: mdi:snowflake-melt
    disabled_by_default: false
  preheat:
    name: Preheat
    id: preheat
    icon: mdi:heat-wave
    disabled_by_default: false
  outdoor:
    name: Outdoor Unit
    id: outdoor
    icon: mdi:fan
    disabled_by_default: false
  auto_dry_active:
    name: Auto Dry Active
    id: auto_dry_active
    icon: mdi:fan-clock
    disabled_by_default: false
  purifier:
    name: Air Purifier
    id: air_purifier
    icon: mdi:pine-tree
    disabled_by_default: false
    restore_mode: ALWAYS_OFF
  internal_thermistor:
    name: Internal Thermistor
    id: internal_thermistor
    icon: mdi:thermometer
    disabled_by_default: false
    restore_mode: ALWAYS_OFF
  auto_dry:
    name: Auto Dry
    id: auto_dry
    icon: mdi:fan-clock
    disabled_by_default: false
    restore_mode: ALWAYS_OFF
  disabled_by_default: false
  visual: {}
number: []
switch: []
select: []

INFO Configuration is valid!

Thank you!
Pavol

[SiboutVanLoo]

Check the wiring. CH03 = no comm for 3 min with wired thermostat. Also check pin config to match esp pins. Op di 17 jun 2025, 08:59 schreef Pavol Holes ***@***.***>:

…

*pavolholes* created an issue (JanM321/esphome-lg-controller#114) <#114> Hi, I bought four pieces of hardware-tiny from one community member and I've connected it to the: Outdoor unit multi split: LG MU2R15.U13 Indoor units: LG H09S1DA.NS1 and LG H12S1D.NS1 Logs are from the H09S1DA.NS1. The other unit (H12S1D.NS1) connected to the same outdoor unit is now communicating with the other ESPHome controller without any issues. I have the same configuration of the units twice but the other two hardware-tiny seems to have hardware issue with TJA1027 so I'm waiting for to replace it. After some time the indoor unit goes into *CH03 error* and stops communicating with the controller. Then I can't do anything with the unit to fix that: - it doesn't respond to the IR remote controller - it doesn't respond to commands from the esphome controller - it doesn't respond to the power button on the unit. I have to turn of the circuit breaker for the outdoor unit to hard-reboot the indoor unit then it communicates with the ESPHome controller without any issues for some time. Note: I don't have any other wired controller than this ESPHome and IR remote controll. Screenshot from yesterday when it happened: Screenshot.2025-06-17.082915.png (view on web) <https://github.com/user-attachments/assets/318292f0-2026-4029-b90f-6954a703ef14> Attached is the Debug log from current time. I don't have a log from time when that happened (yesterday 14:12). If the log from exact time when that happens is needed I can try to start the syslog and collect the logs from controller there. 20250617-logs_pracovna-klima_logs.txt <https://github.com/user-attachments/files/20769730/20250617-logs_pracovna-klima_logs.txt> These lines are repeating now: [08:41:56][D][lg-controller:1358]: update [08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13) [08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13) [08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13) [08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13) [08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13) [08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13) [08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13) [08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13) [08:41:56][D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.3C.00.08.4C (13) [08:42:02][D][lg-controller:1358]: update Configuration validation (I'm using a lot of includes so this is the combined result): INFO ESPHome 2025.5.1 INFO Reading configuration /config/pracovna-klima.yaml... INFO Updating ***@***.*** INFO Detected timezone 'Europe/Bratislava' substitutions: common_comment: Common v0.10 common_deviceSpecific_comment: lg_airconditioner v0.1 temperature_sensor_entity_id: sensor.pracovna_multisenzor_temperature fahrenheit: 'false' is_slave_controller: 'false' device_name: pracovna-klima friendly_name: Pracovna Klima room: Pracovna project_name: pavolholes.Pracovna Klima project_version: '0.1' device_type: ESP32 WROOM i2c_sda: GPIO22 i2c_scl: GPIO21 uart_ld2410_tx: GPIO17 uart_ld2410_rx: GPIO16 esphome: name: pracovna-klima friendly_name: Pracovna Klima comment: ESP32 WROOM | lg_airconditioner v0.1 | Common v0.10 project: name: pavolholes.Pracovna Klima version: '0.1' min_version: 2025.5.1 build_path: build/pracovna-klima area: '' platformio_options: {} includes: [] libraries: [] name_add_mac_suffix: false debug_scheduler: false esp32: board: nodemcu-32s framework: version: 5.1.6 sdkconfig_options: {} advanced: ignore_efuse_custom_mac: false components: [] platform_version: https://github.com/pioarduino/platform-espressif32.git#51.03.07 source: ***@***.***://github.com/pioarduino/esp-idf/releases/download/v5.1.6/esp-idf-v5.1.6.zip type: esp-idf flash_size: 4MB variant: ESP32 cpu_frequency: 160MHZ wifi: fast_connect: true reboot_timeout: 1h ap: ssid: AP password: <REDACTED> ap_timeout: 1min on_connect: then: - logger.log: format: '[WIFI] Connected to wifi.' level: INFO tag: main args: [] on_disconnect: then: - logger.log: format: '[WIFI] Disconneted from wifi.' level: WARN tag: main args: [] manual_ip: static_ip: 192.168.2.231 gateway: 192.168.2.1 subnet: 255.255.255.0 dns1: 0.0.0.0 dns2: 0.0.0.0 domain: .local power_save_mode: LIGHT enable_btm: false enable_rrm: false passive_scan: false enable_on_boot: true networks: - ssid: PI_NoT password: <REDACTED> priority: 0.0 use_address: 192.168.2.231 api: reboot_timeout: 1h encryption: key: <REDACTED> on_client_connected: then: - logger.log: format: '[API] Client [%s] connected to API with IP [%s]' level: INFO args: - !lambda |- client_info.c_str() - !lambda |- client_address.c_str() tag: main on_client_disconnected: then: - logger.log: format: API client disconnected! level: WARN tag: main args: [] port: 6053 password: '' ota: - platform: esphome password: <REDACTED> version: 2 port: 3232 safe_mode: num_attempts: 5 reboot_timeout: 10min boot_is_good_after: 1min disabled: false time: - platform: sntp id: sntp_time servers: - 192.168.2.20 timezone: CET-1CEST,M3.5.0,M10.5.0/3 update_interval: 15min sun: latitude: 48.2700039 longitude: 17.4762098 logger: level: VERY_VERBOSE logs: json: INFO sensor: INFO sensor.filter: INFO adc: INFO ntc: INFO resistance: INFO text_sensor: INFO api: INFO api.service: INFO api.connection: INFO ledc: INFO internal_temperature: INFO esp32.preferences: INFO esp32_ble_tracker: INFO esp32_ble: INFO bluetooth_proxy: INFO i2c: INFO i2c.idf: INFO ld2410: INFO bh1750.sensor: INFO baud_rate: 115200 tx_buffer_size: 512 deassert_rts_dtr: false task_log_buffer_size: 768 hardware_uart: UART0 text_sensor: - platform: version name: Version disabled_by_default: false icon: mdi:new-box entity_category: diagnostic hide_timestamp: false - platform: wifi_info ip_address: name: IP disabled_by_default: false entity_category: diagnostic update_interval: 1s ssid: name: SSID disabled_by_default: false entity_category: diagnostic update_interval: 1s binary_sensor: - platform: status device_class: connectivity name: Status disabled_by_default: false entity_category: diagnostic sensor: - platform: wifi_signal name: WiFi Signal update_interval: 60s disabled_by_default: false force_update: false unit_of_measurement: dBm accuracy_decimals: 0 device_class: signal_strength state_class: measurement entity_category: diagnostic - platform: uptime id: sensor_uptime_timestamp name: Uptime disabled_by_default: false force_update: false icon: mdi:timer-outline accuracy_decimals: 0 device_class: timestamp entity_category: diagnostic type: timestamp - platform: internal_temperature name: Internal Temperature disabled_by_default: false force_update: false unit_of_measurement: °C accuracy_decimals: 1 device_class: temperature state_class: measurement entity_category: diagnostic update_interval: 60s - platform: homeassistant id: temp_sensor internal: true entity_id: sensor.pracovna_multisenzor_temperature disabled_by_default: false force_update: false accuracy_decimals: 1 name: temp_sensor button: - platform: restart name: Restart disabled_by_default: false icon: mdi:restart entity_category: config device_class: restart status_led: pin: number: 2 ignore_strapping_warning: true mode: output: true input: false open_drain: false pullup: false pulldown: false inverted: false ignore_pin_validation_error: false drive_strength: 20.0 bluetooth_proxy: active: true cache_services: true connection_slots: 3 connections: - {} - {} - {} esp32_ble_tracker: scan_parameters: active: true duration: 5min interval: 320ms window: 30ms continuous: true max_connections: 3 software_coexistence: true external_components: - source: url: https://github.com/JanM321/esphome-lg-controller.git type: git refresh: 1min components: - lg_controller uart: - id: ac_serial tx_pin: number: 25 mode: output: true input: false open_drain: false pullup: false pulldown: false inverted: false ignore_pin_validation_error: false ignore_strapping_warning: false drive_strength: 20.0 rx_pin: number: 26 allow_other_uses: true mode: input: true output: false open_drain: false pullup: false pulldown: false inverted: false ignore_pin_validation_error: false ignore_strapping_warning: false drive_strength: 20.0 baud_rate: 104 rx_buffer_size: 256 stop_bits: 1 data_bits: 8 parity: NONE climate: - platform: lg_controller name: '' uart_id: ac_serial rx_pin: number: 26 allow_other_uses: true mode: input: true output: false open_drain: false pullup: false pulldown: false inverted: false ignore_pin_validation_error: false ignore_strapping_warning: false drive_strength: 20.0 fahrenheit: false is_slave_controller: false temperature_sensor: temp_sensor vane1: name: Airflow 1 Up/Down id: vane_position_1 icon: mdi:arrow-up-down disabled_by_default: false vane2: name: Airflow 2 Up/Down id: vane_position_2 icon: mdi:arrow-up-down disabled_by_default: false vane3: name: Airflow 3 Up/Down id: vane_position_3 icon: mdi:arrow-up-down disabled_by_default: false vane4: name: Airflow 4 Up/Down id: vane_position_4 icon: mdi:arrow-up-down disabled_by_default: false overheating: name: Over Heating id: overheating icon: mdi:heating-coil disabled_by_default: false fan_speed_slow: name: Fan Speed Slow id: fan_speed_slow icon: mdi:fan-chevron-down mode: BOX disabled_by_default: false fan_speed_low: name: Fan Speed Low id: fan_speed_low icon: mdi:fan-speed-1 mode: BOX disabled_by_default: false fan_speed_medium: name: Fan Speed Medium id: fan_speed_medium icon: mdi:fan-speed-2 mode: BOX disabled_by_default: false fan_speed_high: name: Fan Speed High id: fan_speed_high icon: mdi:fan-speed-3 mode: BOX disabled_by_default: false sleep_timer: name: Sleep Timer (minutes) id: sleep_timer icon: mdi:timer-outline mode: BOX disabled_by_default: false error_code: name: Error Code id: error_code icon: mdi:alert-circle-outline disabled_by_default: false force_update: false pipe_temp_in: name: Pipe Temperature In id: pipe_temperature_in icon: mdi:thermometer unit_of_measurement: °C disabled_by_default: false force_update: false pipe_temp_mid: name: Pipe Temperature Mid id: pipe_temperature_mid icon: mdi:thermometer unit_of_measurement: °C disabled_by_default: false force_update: false pipe_temp_out: name: Pipe Temperature Out id: pipe_temperature_out icon: mdi:thermometer unit_of_measurement: °C disabled_by_default: false force_update: false defrost: name: Defrost id: defrost icon: mdi:snowflake-melt disabled_by_default: false preheat: name: Preheat id: preheat icon: mdi:heat-wave disabled_by_default: false outdoor: name: Outdoor Unit id: outdoor icon: mdi:fan disabled_by_default: false auto_dry_active: name: Auto Dry Active id: auto_dry_active icon: mdi:fan-clock disabled_by_default: false purifier: name: Air Purifier id: air_purifier icon: mdi:pine-tree disabled_by_default: false restore_mode: ALWAYS_OFF internal_thermistor: name: Internal Thermistor id: internal_thermistor icon: mdi:thermometer disabled_by_default: false restore_mode: ALWAYS_OFF auto_dry: name: Auto Dry id: auto_dry icon: mdi:fan-clock disabled_by_default: false restore_mode: ALWAYS_OFF disabled_by_default: false visual: {} number: [] switch: [] select: [] INFO Configuration is valid! Thank you! Pavol — Reply to this email directly, view it on GitHub <#114>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AFCKJFJOI7SDCP4UJNY44KD3D64ENAVCNFSM6AAAAAB7PII3K2VHI2DSMVQWIX3LMV43ASLTON2WKOZTGE2TEMZQGMZDIOA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[pavolholes]

Thank you @SiboutVanLoo. All already checked and ususally it's working fine. This issue is reocurring for a week and it seems to be related to use of the IR remote controll. I'll try to capture the logs to syslog server in the meantime...

[pavolholes]

Hi all,
today the issue happened twice:

• 13:55 the unit was COOLing
• 16:37 the unit was OFF

In that time noone was touching the IR remote controller so we can rule that out.

In HA it looks like this:

Attached is the log from 12:00 today till now:
20250618 LG CH03 error.log

Snippet from the time when issue happened:
13:55

Jun 18 13:55:11 pracovna-klima lg-controller: [D][lg-controller:950]: received C8.02.80.00.00.04.0C.63.00.00.00.00.E8 (13)
Jun 18 13:55:11 pracovna-klima climate: [D][climate:396]: 'Pracovna Klima' - Sending state:
Jun 18 13:55:11 pracovna-klima climate: [D][climate:399]:   Mode: COOL
Jun 18 13:55:11 pracovna-klima climate: [D][climate:404]:   Fan Mode: LOW
Jun 18 13:55:11 pracovna-klima climate: [D][climate:416]:   Swing Mode: VERTICAL
Jun 18 13:55:11 pracovna-klima climate: [D][climate:419]:   Current Temperature: 27.50°C
Jun 18 13:55:11 pracovna-klima climate: [D][climate:425]:   Target Temperature: 27.00°C
Jun 18 13:55:11 pracovna-klima lg-controller: [D][lg-controller:853]: sending A8.02.80.00.00.04.0C.66.00.00.00.00.F5 (13)
Jun 18 13:55:17 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 13:55:17 pracovna-klima lg-controller: [D][lg-controller:950]: received A8.02.80.00.00.04.0C.66.00.00.00.00.F5 (13)
Jun 18 13:55:17 pracovna-klima lg-controller: [D][lg-controller:966]: verified send
Jun 18 13:55:23 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 13:55:29 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 13:55:35 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 13:55:35 pracovna-klima lg-controller: [D][lg-controller:853]: sending A8.02.80.00.00.04.0C.66.00.00.00.00.F5 (13)
Jun 18 13:55:41 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 13:55:41 pracovna-klima lg-controller: [D][lg-controller:950]: received A8.02.80.00.00.04.0C.66.00.00.00.00.F5 (13)
Jun 18 13:55:41 pracovna-klima lg-controller: [D][lg-controller:966]: verified send
Jun 18 13:55:47 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 13:55:53 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 13:55:59 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 13:55:59 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.36.00.08.46 (13)
Jun 18 13:55:59 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.36.00.08.46 (13)
Jun 18 13:55:59 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.36.00.08.46 (13)
Jun 18 13:55:59 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.36.00.08.46 (13)
Jun 18 13:55:59 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.36.00.08.46 (13)
Jun 18 13:55:59 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.36.00.08.46 (13)
Jun 18 13:55:59 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.36.00.08.46 (13)
Jun 18 13:55:59 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.36.00.08.46 (13)
Jun 18 13:55:59 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.36.00.08.46 (13)
Jun 18 13:56:05 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 13:56:11 pracovna-klima lg-controller: [D][lg-controller:1358]: update

16:37

Jun 18 16:37:09 pracovna-klima lg-controller: [D][lg-controller:950]: received C8.61.80.00.00.00.0D.24.00.00.00.00.8F (13)
Jun 18 16:37:09 pracovna-klima climate: [D][climate:396]: 'Pracovna Klima' - Sending state:
Jun 18 16:37:09 pracovna-klima climate: [D][climate:399]:   Mode: OFF
Jun 18 16:37:09 pracovna-klima climate: [D][climate:404]:   Fan Mode: AUTO
Jun 18 16:37:09 pracovna-klima climate: [D][climate:416]:   Swing Mode: VERTICAL
Jun 18 16:37:09 pracovna-klima climate: [D][climate:419]:   Current Temperature: 28.00°C
Jun 18 16:37:09 pracovna-klima climate: [D][climate:425]:   Target Temperature: 28.00°C
Jun 18 16:37:10 pracovna-klima lg-controller: [D][lg-controller:853]: sending A8.60.80.00.00.00.0D.26.00.00.00.00.EE (13)
Jun 18 16:37:15 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 16:37:15 pracovna-klima lg-controller: [D][lg-controller:950]: received A8.60.80.00.00.00.0D.26.00.00.00.00.EE (13)
Jun 18 16:37:15 pracovna-klima lg-controller: [D][lg-controller:966]: verified send
Jun 18 16:37:21 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 16:37:27 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 16:37:33 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 16:37:33 pracovna-klima lg-controller: [D][lg-controller:853]: sending A8.60.80.00.00.00.0D.26.00.00.00.00.EE (13)
Jun 18 16:37:39 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 16:37:39 pracovna-klima lg-controller: [D][lg-controller:950]: received A8.60.80.00.00.00.0D.26.00.00.00.00.EE (13)
Jun 18 16:37:39 pracovna-klima lg-controller: [D][lg-controller:966]: verified send
Jun 18 16:37:45 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 16:37:51 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 16:37:51 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.39.00.08.43 (13)
Jun 18 16:37:51 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.39.00.08.43 (13)
Jun 18 16:37:51 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.39.00.08.43 (13)
Jun 18 16:37:51 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.39.00.08.43 (13)
Jun 18 16:37:51 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.39.00.08.43 (13)
Jun 18 16:37:51 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.39.00.08.43 (13)
Jun 18 16:37:51 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.39.00.08.43 (13)
Jun 18 16:37:51 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.39.00.08.43 (13)
Jun 18 16:37:51 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.39.00.08.43 (13)
Jun 18 16:37:57 pracovna-klima lg-controller: [D][lg-controller:1358]: update
Jun 18 16:38:03 pracovna-klima lg-controller: [D][lg-controller:1358]: update

I honestly doesn't know what is causing the issue.
I'm going to hard reboot the outdoor unit again...

Oh, I'm updating the configuration where I've:

• removed the Bluetooth Proxy to rule-out another thing which might be causing issues
• added logging to syslog

INFO ESPHome 2025.5.1
INFO Reading configuration /config/pracovna-klima.yaml...
INFO Updating https://github.com/JanM321/esphome-lg-controller.git@None
INFO Detected timezone 'Europe/Bratislava'
substitutions:
  common_comment: Common v0.10
  common_deviceSpecific_comment: lg_airconditioner v0.1
  temperature_sensor_entity_id: sensor.pracovna_multisenzor_temperature
  fahrenheit: 'false'
  is_slave_controller: 'false'
  device_name: pracovna-klima
  friendly_name: Pracovna Klima
  room: Pracovna
  project_name: pavolholes.Pracovna Klima
  project_version: '0.1'
  device_type: ESP32 WROOM
  i2c_sda: GPIO22
  i2c_scl: GPIO21
esphome:
  name: pracovna-klima
  friendly_name: Pracovna Klima
  comment: ESP32 WROOM | lg_airconditioner v0.1 | Common v0.10
  project:
    name: pavolholes.Pracovna Klima
    version: '0.1'
  min_version: 2025.5.1
  build_path: build/pracovna-klima
  area: ''
  platformio_options: {}
  includes: []
  libraries: []
  name_add_mac_suffix: false
  debug_scheduler: false
esp32:
  board: nodemcu-32s
  flash_size: 4MB
  framework:
    version: 2.0.5
    advanced:
      ignore_efuse_custom_mac: false
    source: ~3.20005.0
    platform_version: platformio/espressif32@5.4.0
    type: arduino
  variant: ESP32
  cpu_frequency: 160MHZ
wifi:
  fast_connect: true
  reboot_timeout: 1h
  ap:
    ssid: AP
    password: 3y_BYz-bVc4u
    ap_timeout: 1min
  on_connect:
    then:
    - logger.log:
        format: '[WIFI] Connected to wifi.'
        level: INFO
        args: []
        tag: main
  on_disconnect:
    then:
    - logger.log:
        format: '[WIFI] Disconneted from wifi.'
        level: WARN
        args: []
        tag: main
  manual_ip:
    static_ip: 192.168.2.231
    gateway: 192.168.2.1
    subnet: 255.255.255.0
    dns1: 0.0.0.0
    dns2: 0.0.0.0
  domain: .local
  power_save_mode: LIGHT
  passive_scan: false
  enable_on_boot: true
  networks:
  - ssid: PI_NoT
    password: 3y_BYz-bVc4u
    priority: 0.0
  use_address: 192.168.2.231
api:
  reboot_timeout: 1h
  encryption:
    key: yhCITJerRqnivtZEDcIk3AWkTuNotiXYp40oDBT/jHY=
  on_client_connected:
    then:
    - logger.log:
        format: '[API] Client [%s] connected to API with IP [%s]'
        level: INFO
        args:
        - !lambda |-
          client_info.c_str()
        - !lambda |-
          client_address.c_str()
        tag: main
  on_client_disconnected:
    then:
    - logger.log:
        format: API client disconnected!
        level: WARN
        args: []
        tag: main
  port: 6053
  password: ''
ota:
- platform: esphome
  password: 74805bd09ed328b71f0deaad4f01ff0d
  version: 2
  port: 3232
safe_mode:
  num_attempts: 5
  reboot_timeout: 10min
  boot_is_good_after: 1min
  disabled: false
time:
- platform: sntp
  id: sntp_time
  servers:
  - 192.168.2.20
  timezone: CET-1CEST,M3.5.0,M10.5.0/3
  update_interval: 15min
sun:
  latitude: 48.2700039
  longitude: 17.4762098
logger:
  level: VERY_VERBOSE
  logs:
    json: INFO
    sensor: INFO
    sensor.filter: INFO
    adc: INFO
    ntc: INFO
    resistance: INFO
    text_sensor: INFO
    api: INFO
    api.service: INFO
    api.connection: INFO
    ledc: INFO
    internal_temperature: INFO
    esp32.preferences: INFO
    esp32_ble_tracker: INFO
    esp32_ble: INFO
    bluetooth_proxy: INFO
    i2c: INFO
    i2c.idf: INFO
    ld2410: INFO
    bh1750.sensor: INFO
  baud_rate: 115200
  tx_buffer_size: 512
  deassert_rts_dtr: false
  task_log_buffer_size: 768
  hardware_uart: UART0
text_sensor:
- platform: version
  name: Version
  disabled_by_default: false
  icon: mdi:new-box
  entity_category: diagnostic
  hide_timestamp: false
- platform: wifi_info
  ip_address:
    name: IP
    disabled_by_default: false
    entity_category: diagnostic
    update_interval: 1s
  ssid:
    name: SSID
    disabled_by_default: false
    entity_category: diagnostic
    update_interval: 1s
- platform: debug
  device:
    name: Device Info
    disabled_by_default: false
    icon: mdi:chip
    entity_category: diagnostic
  reset_reason:
    name: Reset Reason
    disabled_by_default: false
    icon: mdi:restart
    entity_category: diagnostic
binary_sensor:
- platform: status
  device_class: connectivity
  name: Status
  disabled_by_default: false
  entity_category: diagnostic
sensor:
- platform: wifi_signal
  name: WiFi Signal
  update_interval: 60s
  disabled_by_default: false
  force_update: false
  unit_of_measurement: dBm
  accuracy_decimals: 0
  device_class: signal_strength
  state_class: measurement
  entity_category: diagnostic
- platform: uptime
  id: sensor_uptime_timestamp
  name: Uptime
  disabled_by_default: false
  force_update: false
  icon: mdi:timer-outline
  accuracy_decimals: 0
  device_class: timestamp
  entity_category: diagnostic
  type: timestamp
- platform: internal_temperature
  name: Internal Temperature
  disabled_by_default: false
  force_update: false
  unit_of_measurement: °C
  accuracy_decimals: 1
  device_class: temperature
  state_class: measurement
  entity_category: diagnostic
  update_interval: 60s
- platform: debug
  free:
    name: Debug HEAP Free
    disabled_by_default: false
    force_update: false
    unit_of_measurement: B
    icon: mdi:counter
    accuracy_decimals: 0
    entity_category: diagnostic
  block:
    name: Debug HEAP Max Block
    disabled_by_default: false
    force_update: false
    unit_of_measurement: B
    icon: mdi:counter
    accuracy_decimals: 0
    entity_category: diagnostic
  loop_time:
    name: Debug Loop Time
    disabled_by_default: false
    force_update: false
    unit_of_measurement: ms
    icon: mdi:timer-outline
    accuracy_decimals: 0
    entity_category: diagnostic
- platform: homeassistant
  id: temp_sensor
  internal: true
  entity_id: sensor.pracovna_multisenzor_temperature
  disabled_by_default: false
  force_update: false
  accuracy_decimals: 1
  name: temp_sensor
button:
- platform: restart
  name: Restart
  disabled_by_default: false
  icon: mdi:restart
  entity_category: config
  device_class: restart
status_led:
  pin:
    number: 2
    ignore_strapping_warning: true
    mode:
      output: true
      input: false
      open_drain: false
      pullup: false
      pulldown: false
    inverted: false
    ignore_pin_validation_error: false
    drive_strength: 20.0
debug:
  update_interval: 5s
udp:
- id: udp_syslog
  addresses:
  - 192.168.2.20
  port: 18511
  listen_address: 255.255.255.255
syslog:
  udp_id: udp_syslog
  time_id: sntp_time
  level: VERY_VERBOSE
  port: 514
  strip: true
  facility: 16
external_components:
- source:
    url: https://github.com/JanM321/esphome-lg-controller.git
    type: git
  refresh: 1min
  components:
  - lg_controller
uart:
- id: ac_serial
  tx_pin:
    number: 25
    mode:
      output: true
      input: false
      open_drain: false
      pullup: false
      pulldown: false
    inverted: false
    ignore_pin_validation_error: false
    ignore_strapping_warning: false
    drive_strength: 20.0
  rx_pin:
    number: 26
    allow_other_uses: true
    mode:
      input: true
      output: false
      open_drain: false
      pullup: false
      pulldown: false
    inverted: false
    ignore_pin_validation_error: false
    ignore_strapping_warning: false
    drive_strength: 20.0
  baud_rate: 104
  rx_buffer_size: 256
  stop_bits: 1
  data_bits: 8
  parity: NONE
climate:
- platform: lg_controller
  name: ''
  uart_id: ac_serial
  rx_pin:
    number: 26
    allow_other_uses: true
    mode:
      input: true
      output: false
      open_drain: false
      pullup: false
      pulldown: false
    inverted: false
    ignore_pin_validation_error: false
    ignore_strapping_warning: false
    drive_strength: 20.0
  fahrenheit: false
  is_slave_controller: false
  temperature_sensor: temp_sensor
  vane1:
    name: Airflow 1 Up/Down
    id: vane_position_1
    icon: mdi:arrow-up-down
    disabled_by_default: false
  vane2:
    name: Airflow 2 Up/Down
    id: vane_position_2
    icon: mdi:arrow-up-down
    disabled_by_default: false
  vane3:
    name: Airflow 3 Up/Down
    id: vane_position_3
    icon: mdi:arrow-up-down
    disabled_by_default: false
  vane4:
    name: Airflow 4 Up/Down
    id: vane_position_4
    icon: mdi:arrow-up-down
    disabled_by_default: false
  overheating:
    name: Over Heating
    id: overheating
    icon: mdi:heating-coil
    disabled_by_default: false
  fan_speed_slow:
    name: Fan Speed Slow
    id: fan_speed_slow
    icon: mdi:fan-chevron-down
    mode: BOX
    disabled_by_default: false
  fan_speed_low:
    name: Fan Speed Low
    id: fan_speed_low
    icon: mdi:fan-speed-1
    mode: BOX
    disabled_by_default: false
  fan_speed_medium:
    name: Fan Speed Medium
    id: fan_speed_medium
    icon: mdi:fan-speed-2
    mode: BOX
    disabled_by_default: false
  fan_speed_high:
    name: Fan Speed High
    id: fan_speed_high
    icon: mdi:fan-speed-3
    mode: BOX
    disabled_by_default: false
  sleep_timer:
    name: Sleep Timer (minutes)
    id: sleep_timer
    icon: mdi:timer-outline
    mode: BOX
    disabled_by_default: false
  error_code:
    name: Error Code
    id: error_code
    icon: mdi:alert-circle-outline
    disabled_by_default: false
    force_update: false
  pipe_temp_in:
    name: Pipe Temperature In
    id: pipe_temperature_in
    icon: mdi:thermometer
    unit_of_measurement: °C
    disabled_by_default: false
    force_update: false
  pipe_temp_mid:
    name: Pipe Temperature Mid
    id: pipe_temperature_mid
    icon: mdi:thermometer
    unit_of_measurement: °C
    disabled_by_default: false
    force_update: false
  pipe_temp_out:
    name: Pipe Temperature Out
    id: pipe_temperature_out
    icon: mdi:thermometer
    unit_of_measurement: °C
    disabled_by_default: false
    force_update: false
  defrost:
    name: Defrost
    id: defrost
    icon: mdi:snowflake-melt
    disabled_by_default: false
  preheat:
    name: Preheat
    id: preheat
    icon: mdi:heat-wave
    disabled_by_default: false
  outdoor:
    name: Outdoor Unit
    id: outdoor
    icon: mdi:fan
    disabled_by_default: false
  auto_dry_active:
    name: Auto Dry Active
    id: auto_dry_active
    icon: mdi:fan-clock
    disabled_by_default: false
  purifier:
    name: Air Purifier
    id: air_purifier
    icon: mdi:pine-tree
    disabled_by_default: false
    restore_mode: ALWAYS_OFF
  internal_thermistor:
    name: Internal Thermistor
    id: internal_thermistor
    icon: mdi:thermometer
    disabled_by_default: false
    restore_mode: ALWAYS_OFF
  auto_dry:
    name: Auto Dry
    id: auto_dry
    icon: mdi:fan-clock
    disabled_by_default: false
    restore_mode: ALWAYS_OFF
  disabled_by_default: false
  visual: {}
number: []
switch: []
select: []

INFO Configuration is valid!

Thanks!
Pavol

[JanM321]

Yeah it would be interesting to see the ESPHome log output when this happens. It could also be a problem with the wiring or hardware.

[pavolholes]

Hi @JanM321,
please find the full log file attached to my previous message.
I captured the ESPHome logs from both occurences today using Syslog server.
I've also updated the answer above where I've cut the snippets from the exact time.
Thanks!
Pavol

[JanM321]

It's weird that when this happens the AC unit basically gets stuck in a loop sending this message:

Jun 18 16:37:51 pracovna-klima lg-controller: [D][lg-controller:950]: received CC.00.00.00.00.01.00.08.00.39.00.08.43 (13)

And when everything is okay it doesn't send messages starting with CC. at all. Right?

CC is a Type 4 message coming from the AC and partially documented in the protocol doc. The ESPHome controller doesn't send or receive this message type and so far that has been fine for all units, but maybe your unit's firmware doesn't like this.

Your unit has a bit set in byte 11 (0x08) of this message and I don't know what that's for. Does your unit have any advanced features that you're using such as 'comfort cooling' (that's the bit before it, 0x04, so I wonder if it's a similar thing).

It would be interesting to find out if there's a pattern based on time-on or something. Does it also happen when the unit is turned off?

[pavolholes]

Hi @JanM321,
you're right, the unit is stuck in a loop sending message starting on 0xCC.

In past days I've collected 459,311 log lines out of which 118,990 were starting on "received".
I've used Excel to split the Bytes to columns and Pivoted that.
I've filtered the messages for 0xCC which were received 65,100 times and got nice "heatmap" of distinct values for each Byte:

So when I rewrite what is static and what is changing:
CC.00.00.00.00.XX.00.08.00.XX.00.XX.XX

Byte 00 0xCC = 1100 1100 breakout:

• 110x_xxxx Source of the message: 0d6 unit
• xxx0_1xxx Product type: 0d1 AC
• xxxx_x100 Message type: 0d4 More status information

Byte 01 0x00 none
Byte 02 0x00 none
Byte 03 0x00 none
Byte 04 0x00 none
Byte 05 three values

• 0x00 none
• 0x01 = 0000_0001 unknown
• 0x02 = 0000_0010 unknown

Byte 06 0x00 none
Byte 07 0x08 = 00001000 High setpoint in degrees C.
Byte 08 0x00 none
Byte 09 0xXX Room temp value
Byte 10 0x00 none
Byte 11 two values

• 0x00 none
• 0x08 = 0000_1000 unknown

Byte 12 0xXX checksum

That was a good excercise for me to understand the bits and Bytes, hexadecimal, binary and decimal calculations 😆 Which only confirms what you wrote - I'm going to look at the Byte 5 and Byte 11.
Findings:

1. Setting for only Byte 5 is not documented. It's only in a group of Bytes 3-5. Weird?

2. It seems there is an dependency between Byte 5 and Byte 11 - when Byte 5 was set to 0x01 or 0x02 then Byte 11 was always 0x08. Other way there isn't an intersection.

• Messages 0xCC with Byte 5 set to 0x00 were received always only after boot followed by messages staring on 0xCD then 0xCE. These are not fauly messages stuck in loop.
• Messages 0xCC with Byte 5 set to 0x01 were causing most of the "stuck in loop" which followed hard reboot
• Messages 0xCC with Byte 5 set to 0x02 were received only on Jun 25 14:33:31 to Jun 25 16:59:21 (and now while writing this) which followed hard reboot

I was testing for the possible new functions and I've:

• Jun 26 11:19 Enabled Absence Detection using IR RC but I didn't find any change in the received messages.
• Jun 26 11:34 Enabled Soft Air using IR RC - Message starting on 01xC8 changed Byte 1 from 0x62 (0110_0010) to 0x03 (0000_0011)
• Jun 26 11:39 Enabled Air Purify using IR RC - Message starting on 01xC8 changed Byte 2 from 0x80 (1000_0000) to 0x84 (1000_0100)
• Jun 26 11:43 Disabled Air Purify using IR RC - OK
• Jun 26 11:44 Disabled Absence Detection using IR RC - OK
• Jun 26 11:44 Change fan speed under Soft Air using IR RC from Auto to 1 (range 1 to 5) - OK
• Jun 26 11:45 Change fan speed under Soft Air using IR RC from 1 to Auto - OK
• Jun 26 11:46 Disabled Soft Air using IR RC
• Jun 26 11:46 Enabled Jet Mode using IR RC

Jun 26 11:47:49 pracovna-klima lg-controller: [D][lg-controller:950]: received C8.E3.00.00.00.04.0C.63.00.00.00.00.4B (13)
Jun 26 11:47:49 pracovna-klima lg-controller: [E][lg-controller:1139]: received unexpected fan mode from AC (7)

Here the Fan speed 0d7: Power doesn't work.

• Jun 26 11:50 Disabled Jet Mode using IR RC
• Jun 26 11:56 Changed Auto Clean+ Function from "Sto" to "ON" but I didn't find any change in the received messages.
• Jun 26 12:05 Changed Auto Clean+ Function from "ON" to "Sto" but I didn't find any change in the received messages.

So to answer your questions:

And when everything is okay it doesn't send messages starting with CC. at all. Right?

Answered above.

Your unit has a bit set in byte 11 (0x08) of this message and I don't know what that's for. Does your unit have any advanced features that you're using such as 'comfort cooling' (that's the bit before it, 0x04, so I wonder if it's a similar thing).

Answered above. This is the newest and highest model of the indoor unit so it does have new AI functions but I just found I can't enable these because the unit is not yet connected to the Wifi and Cloud and I don't have the app because I wanted the local control. But now I see I'm loosing a lot so I'll connect the two units which are not controled with ESP to wifi.

It would be interesting to find out if there's a pattern based on time-on or something. Does it also happen when the unit is turned off?

This mostly happens when the unit is ON but I've already above documented that on Jun 18 16:37:51 it dropped into loop when the unit was OFF.

I don't know what to do now. Please provide any guidenance.

Thanks!
Pavol

Attachments:
20250626 LG AC logs analysis.xlsx
20250626T124100 LG AC pracovna_klima logs.zip

[JanM321]

What we could try is to send this type of message ourselves. It would be a 0xAC message instead of 0xCC. The easiest way to test that is to add this code before this line of code:

uint8_t buf[MsgLen] = {}; // All zeroes.
buf[0] = 0xAC;
buf[12] = calc_checksum(buf);
ESP_LOGD(TAG, "sending %s", format_hex_pretty(buf, MsgLen).c_str());
UARTDevice::write_array(buf, MsgLen);

You should then see AC... messages show up in the log file right after we send an A8... message.

This might help if the unit gets confused because it's not receiving those messages.

[pavolholes]

Ok @JanM321, thanks! I've forked the repo and applied the code (see message above). The change is to send the 'master controler' message often, right?
I've uploaded the firmware to the device. It changed something but didn't resolve the issue.
The unit went to the loop with 0xCC on Jun 26 14:24:56 but didn't drop to CH03 error so I was able to control the unit with the IR RC. I saw the issue in logs on 14:30 and 14:39 I've changed the target temp using the IR RC to 26C and on 14:42 back to 27C. In HomeAssistant ofc. I don't see any change...
What now? Shall I try to reboot the unit?

Logs:
20250626 LG AC pracovna_klima logs after test of fix for issue 114.txt

Thanks!

Edit: I had to reboot the unit twice already because at the end it ended in CH03 error and it's too hot in my work room and I need to work 😄

[JanM321]

I tried to test this with my PREMTB100 controller. It sends AC.. messages in response to the CC messages from your AC, but it also preserves the bytes from the CC message (but it changes the temperature in byte 9). Maybe we could try that next. Instead of the earlier code I gave it would be:

uint8_t buf[MsgLen] = {}; // All zeroes.
buf[0] = 0xAC;
buf[5] = 0x01;
buf[7] = 0x08;
buf[9] = uint8_t(temp * 2);
buf[11] = 0x08;
buf[12] = calc_checksum(buf);
ESP_LOGD(TAG, "sending %s", format_hex_pretty(buf, MsgLen).c_str());
UARTDevice::write_array(buf, MsgLen);

[pavolholes]

Hi @JanM321, thank you, I've applied the adjusted code and uploaded fresh fw to the esphome device. Unfortunatelly it didn't resolve the issue but today I saw a pattern - the CC messages loop happens exactly one hour after reboot.

1st hard reboot:

Jul  1 15:19:43 pracovna-klima sntp: [D][sntp:067]: Synchronized time: 2025-07-01 15:19:43
Jul  1 15:19:50 pracovna-klima lg-controller: [D][lg-controller:1367]: update

then ~1 hour later:

Jul  1 16:20:21 pracovna-klima lg-controller: [D][lg-controller:959]: received C8.62.00.00.00.04.0C.63.00.00.00.00.C8 (13)
Jul  1 16:20:21 pracovna-klima climate: [D][climate:396]: 'Pracovna Klima' - Sending state:
Jul  1 16:20:21 pracovna-klima climate: [D][climate:399]:   Mode: COOL
Jul  1 16:20:21 pracovna-klima climate: [D][climate:404]:   Fan Mode: AUTO
Jul  1 16:20:21 pracovna-klima climate: [D][climate:416]:   Swing Mode: OFF
Jul  1 16:20:21 pracovna-klima climate: [D][climate:419]:   Current Temperature: 27.50°C
Jul  1 16:20:21 pracovna-klima climate: [D][climate:425]:   Target Temperature: 27.00°C
Jul  1 16:20:22 pracovna-klima lg-controller: [D][lg-controller:853]: sending A8.62.00.00.00.04.0C.66.00.00.00.00.D5 (13)
Jul  1 16:20:22 pracovna-klima lg-controller: [D][lg-controller:879]: sending AC.00.00.00.00.01.00.08.00.3A.00.08.A2 (13)
Jul  1 16:20:27 pracovna-klima lg-controller: [D][lg-controller:1367]: update
Jul  1 16:20:27 pracovna-klima lg-controller: [D][lg-controller:959]: received A8.62.00.00.00.04.0C.66.00.00.00.00.D5 (13)
Jul  1 16:20:27 pracovna-klima lg-controller: [D][lg-controller:975]: verified send
Jul  1 16:20:27 pracovna-klima lg-controller: [D][lg-controller:959]: received AC.00.00.00.00.01.00.08.00.3A.00.08.A2 (13)
Jul  1 16:20:33 pracovna-klima lg-controller: [D][lg-controller:1367]: update
Jul  1 16:20:39 pracovna-klima lg-controller: [D][lg-controller:1367]: update
Jul  1 16:20:45 pracovna-klima lg-controller: [D][lg-controller:1367]: update
Jul  1 16:20:45 pracovna-klima lg-controller: [D][lg-controller:959]: received CC.00.00.00.00.02.00.08.00.36.00.08.41 (13)
Jul  1 16:20:45 pracovna-klima lg-controller: [D][lg-controller:959]: received CC.00.00.00.00.02.00.08.00.36.00.08.41 (13)
Jul  1 16:20:45 pracovna-klima lg-controller: [D][lg-controller:959]: received CC.00.00.00.00.02.00.08.00.36.00.08.41 (13)
Jul  1 16:20:45 pracovna-klima lg-controller: [D][lg-controller:959]: received CC.00.00.00.00.02.00.08.00.36.00.08.41 (13)

I was working so I noticed that the unit has CH03 after 40 minutes so I rebooted the unit.

Jul  1 16:59:54 pracovna-klima sntp: [D][sntp:067]: Synchronized time: 2025-07-01 16:59:54
Jul  1 17:00:02 pracovna-klima lg-controller: [D][lg-controller:1367]: update

and ~1 hour later...

Jul  1 18:01:14 pracovna-klima lg-controller: [D][lg-controller:959]: received C8.63.00.00.00.00.0C.61.00.00.00.00.CD (13)
Jul  1 18:01:14 pracovna-klima climate: [D][climate:396]: 'Pracovna Klima' - Sending state:
Jul  1 18:01:15 pracovna-klima climate: [D][climate:399]:   Mode: COOL
Jul  1 18:01:15 pracovna-klima climate: [D][climate:404]:   Fan Mode: AUTO
Jul  1 18:01:15 pracovna-klima climate: [D][climate:416]:   Swing Mode: OFF
Jul  1 18:01:15 pracovna-klima climate: [D][climate:419]:   Current Temperature: 26.50°C
Jul  1 18:01:15 pracovna-klima climate: [D][climate:425]:   Target Temperature: 27.00°C
Jul  1 18:01:20 pracovna-klima lg-controller: [D][lg-controller:1367]: update
Jul  1 18:01:26 pracovna-klima lg-controller: [D][lg-controller:1367]: update
Jul  1 18:01:26 pracovna-klima lg-controller: [D][lg-controller:1463]: line busy, not sending yet
Jul  1 18:01:32 pracovna-klima lg-controller: [D][lg-controller:1367]: update
Jul  1 18:01:32 pracovna-klima lg-controller: [D][lg-controller:959]: received CC.00.00.00.00.01.00.08.00.35.00.08.47 (13)
Jul  1 18:01:32 pracovna-klima lg-controller: [D][lg-controller:959]: received CC.00.00.00.00.01.00.08.00.35.00.08.47 (13)
Jul  1 18:01:32 pracovna-klima lg-controller: [D][lg-controller:959]: received CC.00.00.00.00.01.00.08.00.35.00.08.47 (13)

After 30 minutes of having unit in the above "loop" it was still not in CH03 error and I was able to turn it off using the IR RC. 42 minutes after the "loop" I just found the unit with CH03 error even though it was off.
So I believe it drops to the CH03 error somewhere between 30-40 minutes of being in loop.

Full log after applying the updated code with two manual reboots:

20250701 LG AC CH03 fix pracovna_klima log.txt

[JochenV1976]

I guess I have more or less the same with a LG H24S1DA unit.

At first installation, I constantly received 'invalid checksum' messages.
I turned the power to the outdoor unit off and back on, and the issues was solved.
Later I received a CH03 error, that was solved after a power cycle.

There was another 'invalid checksum' after a while.
And after +/- 1 hour, the repeated 'receiving' messages started. Sometimes a 'line busy' message also appears.
When the repeated receiving starts, I can no longer see that messages are being sent. No temperature updates, and no possibility to turn the airco off (from heat to off).

I'll try to swap two LG Controllers, to see if it is PCB/ESP related, or airco related.

[JochenV1976]

Yesterday i did the test with only connecting the ESPHOME-LG-CONTROLLER to the unit, without starting the unit (so no heat/cooling/... just OFF). Even then, after +/- 1 hour, the error CH03 came on the unit :(

Rebooting the ESP every 30 minutes doesn't solve the problem either.

I have the idea that if you put the ESPHOME as slave, it gives the same result (only the received messages, and nothing else).

Same hardware (PCB + ESP + cable) onto another unit (non H24S1) doesn't bring any problems.

And on the other units, it's really working very well. It's great to be able to use a room sensor and no longer the integrated sensor!
Thanks Jan!