add T-Echo-Lite Device Variant

janryklikas-tqgg · janryklikas-tqgg · commit b11f08422ef6 · 2025-09-23T19:39:11.000+02:00
diff --git a/variants/lilygo_techo_lite/TechoBoard.cpp b/variants/lilygo_techo_lite/TechoBoard.cpp
@@ -0,0 +1,90 @@
+#include <Arduino.h>
+#include "TechoBoard.h"
+
+#ifdef LILYGO_TECHO
+
+#include <bluefruit.h>
+#include <Wire.h>
+
+static BLEDfu bledfu;
+
+static void connect_callback(uint16_t conn_handle) {
+  (void)conn_handle;
+  MESH_DEBUG_PRINTLN("BLE client connected");
+}
+
+static void disconnect_callback(uint16_t conn_handle, uint8_t reason) {
+  (void)conn_handle;
+  (void)reason;
+
+  MESH_DEBUG_PRINTLN("BLE client disconnected");
+}
+
+void TechoBoard::begin() {
+  // for future use, sub-classes SHOULD call this from their begin()
+  startup_reason = BD_STARTUP_NORMAL;
+
+  Wire.begin();
+
+  pinMode(SX126X_POWER_EN, OUTPUT);
+  digitalWrite(SX126X_POWER_EN, HIGH);
+  delay(10);   // give sx1262 some time to power up
+}
+
+uint16_t TechoBoard::getBattMilliVolts() {
+  int adcvalue = 0;
+
+  analogReference(AR_INTERNAL_3_0);
+  analogReadResolution(12);
+  delay(10);
+
+  // ADC range is 0..3000mV and resolution is 12-bit (0..4095)
+  adcvalue = analogRead(PIN_VBAT_READ);
+  // Convert the raw value to compensated mv, taking the resistor-
+  // divider into account (providing the actual LIPO voltage)
+  return (uint16_t)((float)adcvalue * REAL_VBAT_MV_PER_LSB);
+}
+
+bool TechoBoard::startOTAUpdate(const char* id, char reply[]) {
+  // Config the peripheral connection with maximum bandwidth
+  // more SRAM required by SoftDevice
+  // Note: All config***() function must be called before begin()
+  Bluefruit.configPrphBandwidth(BANDWIDTH_MAX);
+  Bluefruit.configPrphConn(92, BLE_GAP_EVENT_LENGTH_MIN, 16, 16);
+
+  Bluefruit.begin(1, 0);
+  // Set max power. Accepted values are: -40, -30, -20, -16, -12, -8, -4, 0, 4
+  Bluefruit.setTxPower(4);
+  // Set the BLE device name
+  Bluefruit.setName("TECHO_OTA");
+
+  Bluefruit.Periph.setConnectCallback(connect_callback);
+  Bluefruit.Periph.setDisconnectCallback(disconnect_callback);
+
+  // To be consistent OTA DFU should be added first if it exists
+  bledfu.begin();
+
+  // Set up and start advertising
+  // Advertising packet
+  Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
+  Bluefruit.Advertising.addTxPower();
+  Bluefruit.Advertising.addName();
+
+  /* Start Advertising
+    - Enable auto advertising if disconnected
+    - Interval:  fast mode = 20 ms, slow mode = 152.5 ms
+    - Timeout for fast mode is 30 seconds
+    - Start(timeout) with timeout = 0 will advertise forever (until connected)
+
+    For recommended advertising interval
+    https://developer.apple.com/library/content/qa/qa1931/_index.html
+  */
+  Bluefruit.Advertising.restartOnDisconnect(true);
+  Bluefruit.Advertising.setInterval(32, 244); // in unit of 0.625 ms
+  Bluefruit.Advertising.setFastTimeout(30);   // number of seconds in fast mode
+  Bluefruit.Advertising.start(0);             // 0 = Don't stop advertising after n seconds
+
+  strcpy(reply, "OK - started");
+  return true;
+}
+#endif
diff --git a/variants/lilygo_techo_lite/TechoBoard.h b/variants/lilygo_techo_lite/TechoBoard.h
@@ -0,0 +1,55 @@
+#pragma once
+
+#include <MeshCore.h>
+#include <Arduino.h>
+
+// built-ins
+#define VBAT_MV_PER_LSB   (0.73242188F)   // 3.0V ADC range and 12-bit ADC resolution = 3000mV/4096
+
+#define VBAT_DIVIDER      (0.5F)          // 150K + 150K voltage divider on VBAT
+#define VBAT_DIVIDER_COMP (2.0F)          // Compensation factor for the VBAT divider
+
+#define PIN_VBAT_READ     (4)
+#define REAL_VBAT_MV_PER_LSB (VBAT_DIVIDER_COMP * VBAT_MV_PER_LSB)
+
+class TechoBoard : public mesh::MainBoard {
+protected:
+  uint8_t startup_reason;
+
+public:
+
+  void begin();
+  uint16_t getBattMilliVolts() override;
+  bool startOTAUpdate(const char* id, char reply[]) override;
+
+  uint8_t getStartupReason() const override {
+    return startup_reason;
+  }
+
+  const char* getManufacturerName() const override {
+    return "LilyGo T-Echo";
+  }
+
+  void powerOff() override {
+    #ifdef LED_RED
+    digitalWrite(LED_RED, LOW);
+    #endif
+    #ifdef LED_GREEN
+    digitalWrite(LED_GREEN, LOW);
+    #endif
+    #ifdef LED_BLUE
+    digitalWrite(LED_BLUE, LOW);
+    #endif
+    #ifdef DISP_BACKLIGHT
+    digitalWrite(DISP_BACKLIGHT, LOW);
+    #endif
+    #ifdef PIN_PWR_EN
+    digitalWrite(PIN_PWR_EN, LOW);
+    #endif
+    sd_power_system_off();
+  }
+
+  void reboot() override {
+    NVIC_SystemReset();
+  }
+};
diff --git a/variants/lilygo_techo_lite/platformio.ini b/variants/lilygo_techo_lite/platformio.ini
@@ -0,0 +1,107 @@
+[LilyGo_T-Echo-Lite]
+extends = nrf52_base
+board = t-echo
+board_build.ldscript = boards/nrf52840_s140_v6.ld
+build_flags = ${nrf52_base.build_flags}
+  -I variants/lilygo_techo_lite
+  -I src/helpers/nrf52
+  -I lib/nrf52/s140_nrf52_6.1.1_API/include
+  -I lib/nrf52/s140_nrf52_6.1.1_API/include/nrf52
+  -D LILYGO_TECHO
+  -D RADIO_CLASS=CustomSX1262
+  -D WRAPPER_CLASS=CustomSX1262Wrapper
+  -D LORA_TX_POWER=22
+  -D P_LORA_DIO_1=40
+  -D P_LORA_NSS=11
+  -D P_LORA_RESET=7
+  -D P_LORA_BUSY=14
+  -D P_LORA_SCLK=13
+  -D P_LORA_MISO=17
+  -D P_LORA_MOSI=15
+  -D SX126X_POWER_EN=30
+  -D SX126X_CURRENT_LIMIT=140
+  -D SX126X_RX_BOOSTED_GAIN=1
+  -D P_LORA_TX_LED=LED_GREEN
+  -D DISABLE_DIAGNOSTIC_OUTPUT
+  -D ENV_INCLUDE_GPS=1
+  ; -D ENV_INCLUDE_BME280=1
+  -D GPS_BAUD_RATE=9600
+  -D PIN_GPS_EN=GPS_EN
+  ; -D TELEM_BME280_ADDRESS=0x77
+  -D DISPLAY_CLASS=GxEPDDisplay
+  -D EINK_DISPLAY_MODEL=GxEPD2_122_T61
+  -D EINK_SCALE_X=1.0f
+  -D EINK_SCALE_Y=2.0f
+  -D EINK_X_OFFSET=0
+  -D EINK_Y_OFFSET=10
+  -D DISPLAY_ROTATION=4
+  -D AUTO_OFF_MILLIS=0
+build_src_filter = ${nrf52_base.build_src_filter}
+  +<helpers/*.cpp>
+  +<TechoBoard.cpp>
+  +<helpers/sensors/EnvironmentSensorManager.cpp>
+  +<helpers/ui/GxEPDDisplay.cpp>
+  +<helpers/ui/MomentaryButton.cpp>
+  +<../variants/lilygo_techo_lite>
+lib_deps =
+  ${nrf52_base.lib_deps}
+  stevemarple/MicroNMEA @ ^2.0.6
+  adafruit/Adafruit BME280 Library @ ^2.3.0
+  zinggjm/GxEPD2 @ 1.6.2
+  bakercp/CRC32 @ ^2.0.0
+debug_tool = jlink
+upload_protocol = nrfutil
+
+[env:LilyGo_T-Echo-Lite_repeater]
+extends = LilyGo_T-Echo-Lite
+build_src_filter = ${LilyGo_T-Echo-Lite.build_src_filter}
+  +<../examples/simple_repeater>
+build_flags =
+  ${LilyGo_T-Echo-Lite.build_flags}
+  -D ADVERT_NAME='"T-Echo-Lite Repeater"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=8
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+
+[env:LilyGo_T-Echo-Lite_room_server]
+extends = LilyGo_T-Echo-Lite
+build_src_filter = ${LilyGo_T-Echo-Lite.build_src_filter}
+  +<../examples/simple_room_server>
+build_flags =
+  ${LilyGo_T-Echo-Lite.build_flags}
+  -D ADVERT_NAME='"T-Echo-Lite Room"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+
+[env:LilyGo_T-Echo-Lite_companion_radio_ble]
+extends = LilyGo_T-Echo-Lite
+board_build.ldscript = boards/nrf52840_s140_v6_extrafs.ld
+board_upload.maximum_size = 712704
+build_flags =
+  ${LilyGo_T-Echo-Lite.build_flags}
+  -I src/helpers/ui
+  -I examples/companion_radio/ui-new
+  -D MAX_CONTACTS=350
+  -D MAX_GROUP_CHANNELS=40
+  ; -D QSPIFLASH=1
+  -D BLE_PIN_CODE=123456
+  ; -D BLE_DEBUG_LOGGING=1
+  -D OFFLINE_QUEUE_SIZE=256
+  -D UI_RECENT_LIST_SIZE=9
+  -D UI_SENSORS_PAGE=1
+  ; -D MESH_PACKET_LOGGING=1
+  ; -D MESH_DEBUG=1
+  -D AUTO_SHUTDOWN_MILLIVOLTS=3300
+build_src_filter = ${LilyGo_T-Echo-Lite.build_src_filter}
+  +<helpers/nrf52/SerialBLEInterface.cpp>
+  +<../examples/companion_radio/*.cpp>
+  +<../examples/companion_radio/ui-new/*.cpp>
+lib_deps =
+  ${LilyGo_T-Echo-Lite.lib_deps}
+  densaugeo/base64 @ ~1.4.0
diff --git a/variants/lilygo_techo_lite/target.cpp b/variants/lilygo_techo_lite/target.cpp
@@ -0,0 +1,57 @@
+#include <Arduino.h>
+#include "target.h"
+#include <helpers/ArduinoHelpers.h>
+#include <helpers/sensors/MicroNMEALocationProvider.h>
+
+TechoBoard board;
+
+RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY, SPI);
+
+WRAPPER_CLASS radio_driver(radio, board);
+
+VolatileRTCClock fallback_clock;
+AutoDiscoverRTCClock rtc_clock(fallback_clock);
+
+#ifdef ENV_INCLUDE_GPS
+MicroNMEALocationProvider nmea = MicroNMEALocationProvider(Serial1, &rtc_clock);
+EnvironmentSensorManager sensors = EnvironmentSensorManager(nmea);
+#else
+EnvironmentSensorManager sensors = EnvironmentSensorManager();
+#endif
+
+#ifdef DISPLAY_CLASS
+  DISPLAY_CLASS display;
+  MomentaryButton user_btn(PIN_USER_BTN, 1000, true);
+#endif
+
+bool radio_init() {
+  rtc_clock.begin(Wire);
+  
+  // pinMode(SX126X_RF_VC1, OUTPUT);
+  // pinMode(SX126X_RF_VC2, OUTPUT);
+  // set_SX126X_RF_Transmitter_Switch(false);
+
+  return radio.std_init(&SPI);
+}
+
+uint32_t radio_get_rng_seed() {
+  return radio.random(0x7FFFFFFF);
+}
+
+void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
+  radio.setFrequency(freq);
+  radio.setSpreadingFactor(sf);
+  radio.setBandwidth(bw);
+  radio.setCodingRate(cr);
+}
+
+void radio_set_tx_power(uint8_t dbm) {
+  radio.setOutputPower(dbm);
+  // set_SX126X_RF_Transmitter_Switch(true);
+}
+
+mesh::LocalIdentity radio_new_identity() {
+  RadioNoiseListener rng(radio);
+  return mesh::LocalIdentity(&rng);  // create new random identity
+}
+
diff --git a/variants/lilygo_techo_lite/target.h b/variants/lilygo_techo_lite/target.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#define RADIOLIB_STATIC_ONLY 1
+#include <RadioLib.h>
+#include <helpers/radiolib/RadioLibWrappers.h>
+#include <TechoBoard.h>
+#include <helpers/radiolib/CustomSX1262Wrapper.h>
+#include <helpers/AutoDiscoverRTCClock.h>
+#include <helpers/SensorManager.h>
+#include <helpers/sensors/EnvironmentSensorManager.h>
+#include <helpers/sensors/LocationProvider.h>
+#ifdef DISPLAY_CLASS
+  #include <helpers/ui/GxEPDDisplay.h>
+  #include <helpers/ui/MomentaryButton.h>
+#endif
+
+extern TechoBoard board;
+extern WRAPPER_CLASS radio_driver;
+extern AutoDiscoverRTCClock rtc_clock;
+extern EnvironmentSensorManager sensors;
+
+#ifdef DISPLAY_CLASS
+  extern DISPLAY_CLASS display;
+  extern MomentaryButton user_btn;
+#endif
+
+bool radio_init();
+uint32_t radio_get_rng_seed();
+void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
+void radio_set_tx_power(uint8_t dbm);
+mesh::LocalIdentity radio_new_identity();
diff --git a/variants/lilygo_techo_lite/variant.cpp b/variants/lilygo_techo_lite/variant.cpp
@@ -0,0 +1,39 @@
+#include "variant.h"
+#include "wiring_constants.h"
+#include "wiring_digital.h"
+
+const int MISO = PIN_SPI1_MISO;
+const int MOSI = PIN_SPI1_MOSI;
+const int SCK = PIN_SPI1_SCK;
+
+const uint32_t g_ADigitalPinMap[] = {
+  0xff, 0xff, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
+  14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
+  27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
+  40, 41, 42, 43, 44, 45, 46, 47
+};
+
+void initVariant() {
+  pinMode(PIN_PWR_EN, OUTPUT);
+  digitalWrite(PIN_PWR_EN, HIGH);
+
+  pinMode(PIN_BUTTON1, INPUT_PULLUP);
+  pinMode(PIN_BUTTON2, INPUT_PULLUP);
+
+  pinMode(LED_RED, OUTPUT);
+  pinMode(LED_GREEN, OUTPUT);
+  pinMode(LED_BLUE, OUTPUT);
+  digitalWrite(LED_BLUE, HIGH);
+  digitalWrite(LED_GREEN, HIGH);
+  digitalWrite(LED_RED, HIGH);
+
+  // pinMode(PIN_TXCO, OUTPUT);
+  // digitalWrite(PIN_TXCO, HIGH);
+
+  pinMode(DISP_POWER, OUTPUT);
+  digitalWrite(DISP_POWER, LOW);
+
+  // shutdown gps
+  pinMode(GPS_EN, OUTPUT);
+  digitalWrite(GPS_EN, LOW);
+}
diff --git a/variants/lilygo_techo_lite/variant.h b/variants/lilygo_techo_lite/variant.h
