rtlamr2mqtt fails to start with 2 SDR Devices connected

[JAudi23]

Hi all,

Looking for some assistance in resolving this error.
I currently have HA Yellow running an SDR device for rtl_433 that works great.
I've tried adding a second device for this add-on however after a restart of HA it fails to start and shows the below in the logs.

[2025-08-30 07:15:53,370] INFO:Starting rtlamr2mqtt 2025.6.6
[2025-08-30 07:15:53,376] DEBUG:Starting new HTTP connection (1): supervisor:80
[2025-08-30 07:15:53,385] DEBUG:http://supervisor:80 "GET /services/mqtt HTTP/1.1" 200 214
[2025-08-30 07:15:53,387] INFO:Config loaded successfully
[2025-08-30 07:15:53,388] INFO:Connecting to MQTT broker at core-mosquitto:1883
[2025-08-30 07:15:53,392] INFO:Subscribing to homeassistant/status
[2025-08-30 07:15:53,397] INFO:Publishing to homeassistant/device/22222222/config: {"device": {"identifiers": "meter_22222222", 
"name": "my_energy_meter", "manufacturer": "RTLAMR2MQTT", "model": "Smart Meter", "sw_version": "1.0", "serial_number": 22222222,
 "hw_version": "1.0"}, "origin": {"name": "2mqtt", "sw_version": "2025.6.6", "support_url": "https://github.com/allangood/rtlamr2mqtt"}, 
"components": {"22222222_reading": {"platform": "sensor", "name": "my_energy_meter", "value_template": "{{ value_json.reading|float }}", 
"json_attributes_topic": "rtlamr/22222222/attributes", "unique_id": "22222222_reading", "id": 22222222, "protocol": "r900", "format": 
"######.###", "unit_of_measurement": "KWh", "icon": "mdi:gauge", "device_class": "energy", "state_class": "total_increasing"}, 
"22222222_lastseen": {"platform": "sensor", "name": "Last Seen", "device_class": "timestamp", "value_template": "{{ value_json.lastseen }}", 
"unique_id": "22222222_lastseen"}}, "state_topic": "rtlamr/22222222/state", "availability_topic": "rtlamr/status", "qos": 1}
[2025-08-30 07:15:54,398] INFO:Publishing to rtlamr/status: online
[2025-08-30 07:15:54,499] DEBUG:Reseting USB device: 001:005
[2025-08-30 07:15:54,501] INFO:Starting RTL_TCP using: /usr/bin/rtl_tcp -d 0 -s 2048000
[2025-08-30 07:15:54,644] CRITICAL:RTL_TCP failed to start errcode: 1
Traceback (most recent call last):
  File "/opt/venv/app/rtlamr2mqtt.py", line 508, in <module>
    main()
    ~~~~^^
  File "/opt/venv/app/rtlamr2mqtt.py", line 347, in main
    if rtltcp.returncode is not None:
       ^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'returncode'

This is what my config looks like:

general:
  sleep_for: 60
  verbosity: info
  device_id: "001:005"
custom_parameters: {}
mqtt:
  ha_autodiscovery_topic: homeassistant
  ha_status_topic: homeassistant/status
  base_topic: rtlamr
meters:
  - id: 22222222
    protocol: r900
    name: my_energy_meter
    format: "######.###"
    unit_of_measurement: KWh
    icon: mdi:gauge
    device_class: energy

Any suggestions on what I should do to try and resolve this?

[allangood]

Looks like the 001:005 is your first device. (running the command lsusb would help here).

This seems that both applications are trying to use the same device. Try to adjust the USB parameters to use a different device.

[JAudi23]

Looks like I messed up, not sure how, but I checked again using lsusb and it was actually on 001:004.

It seems to be running properly now, however I'm stuck with no idea on howt o actually identify if my meter is readable or not.