Sonoff B1 LED Wifi Bulb template error in log

Configuration
1

Hi,

I have received my bub and I have installed the Tasmota firmware from: https://github.com/arendst/Sonoff-Tasmota/wiki

I have it working in HA, just getting an error in the logs that I would like to resolve.

All the examples I have found suggest that this should work correctly, so I’m not sure if it’s something I have wrong or an issue/not yet supported feature.

When the light is switched on, I see the following MQTT commands which are corret:

cmnd/sonoffb1/POWER ON
stat/sonoffb1/RESULT {"POWER":"ON"}
stat/sonoffb1/POWER ON

I get the following error in the HA log.

 Traceback (most recent call last):
  File "/usr/lib/python3.5/asyncio/events.py", line 126, in _run
    self._callback(*self._args)
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/mqtt/__init__.py", line 232, in async_mqtt_topic_subscriber
    hass.async_run_job(msg_callback, dp_topic, payload, dp_qos)
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/core.py", line 247, in async_run_job
    target(*args)
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/light/mqtt.py", line 233, in brightness_received
    device_value = float(templates[CONF_BRIGHTNESS](payload))
ValueError: could not convert string to float:

My config:

light:  
  - platform: mqtt
    name: "Lounge lamp"
    command_topic: "cmnd/sonoffb1/POWER"
    state_topic: "stat/sonoffb1/POWER"
#    state_value_template: "{{ value_json.state }}"
    rgb_command_topic: "cmnd/sonoffb1/COLOR"
    rgb_command_template: "{{ '#%02x%02x%02x0000'| format(blue, green, red) }}"
#    rgb_state_topic: "stat/sonoffb1/COLOR/RESULT"
    brightness_state_topic: "stat/sonoffb1/RESULT"
    brightness_value_template: "{{ value_json.Dimmer }}"
    brightness_command_topic: "cmnd/sonoffb1/DIMMER"
    brightness_scale: 100
    color_temp_command_topic: "cmnd/sonoffb1/CT"
#    color_temp_state_topic: "stat/sonoffb1/RESULT"
#    color_temp_value_template: "{{ value_json.CT }}"
    qos: 0
    payload_on: "ON"
    payload_off: "OFF"
    optimistic: false
    retain: true

The issues is related to the following config, if I remove the lines I get no errors, but the brightness state is not maintained in the GUI.

brightness_state_topic: "stat/sonoffb1/RESULT"
brightness_value_template: "{{ value_json.Dimmer }}"

There is no Dimmer value present in the topic when it first turns on: stat/sonoffb1/RESULT so it shouldn’t be matching anything, why the error???

stat/sonoffb1/RESULT {"POWER":"ON"}
stat/sonoffb1/POWER ON

Thanks for any light you can shed on the issue!

2

Anyone able to shed some light on error I get?

 Traceback (most recent call last):
  File "/usr/lib/python3.5/asyncio/events.py", line 126, in _run
    self._callback(*self._args)
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/mqtt/__init__.py", line 232, in async_mqtt_topic_subscriber
    hass.async_run_job(msg_callback, dp_topic, payload, dp_qos)
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/core.py", line 247, in async_run_job
    target(*args)
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/light/mqtt.py", line 233, in brightness_received
    device_value = float(templates[CONF_BRIGHTNESS](payload))
ValueError: could not convert string to float:`Preformatted text`
3

So it seems that it’s unhappy that the value_json.Dimmer does not exist, and it’s trying to process the error as a int.

Is there a way to do something like: {if defined value_json.Dimmer {{value_json.Dimmer}}}

4

brightness_value_template: “{{ value_json.brightness }}”

5

Did you get this working mate?

6

I’d be interested to see if this works as well, I noticed this in my logs as well with the AiLight firwmare, although the bulb works fine.

7

These guys have it worked out. See bottom config
No errors now!

8

Thanks for the update, looks like I have it working but it’s missing the 4th channel for me as I have a RGBW bulb. I’ll see if I can adapt things.

9

So I have found a few issues with the current templates and retained messages making the B1 come on when reconnecting to the MQTT server I worked out this is best approach:

On the sonoff B1 its best to turn on PoweRetain so Homassistant can see the status when it first starts up, also SetOption 4 on so that the responses are the same as the commands, set the following options:

PowerRetain on
SetOption4 on
Fade on (optional, but makes the transitions slower)
Speed 5 (optional, but makes the transitions slower)

light:  
  - platform: mqtt
    name: "Lounge lamp"
    state_topic: "stat/sonoffb1/POWER"
    state_value_template: "{{ value }}"
    command_topic: "cmnd/sonoffb1/POWER"
    brightness_state_topic: "stat/sonoffb1/DIMMER"
    brightness_command_topic: "cmnd/sonoffb1/Dimmer"
    brightness_value_template: "{{ value_json.Dimmer }}"
    brightness_scale: 100
    rgb_state_topic: "stat/sonoffb1/COLOR"
    rgb_command_topic: "cmnd/sonoffb1/Color"
    rgb_command_template: "{{ '%02x%02x%02x0000' | format(red, green, blue) }}"
    rgb_value_template: "{{ value_json.Color[0:2]|int(base=16) }},{{ value_json.Color[2:4]|int(base=16) }},{{ value_json.Color[4:6]|int(base=16) }}"
    color_temp_state_topic: "stat/sonoffb1/CT"
    color_temp_command_topic: "cmnd/sonoffb1/CT"
    color_temp_value_template: "{{ value_json.CT }}"
    effect_state_topic: "stat/sonoffb1/SCHEME"
    effect_command_topic: "cmnd/sonoffb1/Scheme"
    effect_value_template: "{{ value_json.Scheme }}"
    effect_list:
      - 0
      - 1
      - 2
      - 3
      - 4
    availability_topic: "tele/sonoffb1/LWT"
    payload_available: "Online"
    payload_not_available: "Offline"
    qos: 0
    payload_on: "ON"
    payload_off: "OFF"
    optimistic: false
    retain: false