Home Assistant Warning: "Template variable warning: 'dict object' has no attribute 'displaymetric' when rendering '{{ value_json.displaymetric }}'

[Snuffy2]

Describe the bug
Since upgrading to v1.6.0, I've been getting a lot of these errors in my Home Assistant logs.

2023-06-11 21:33:44.109 WARNING (MainThread) [homeassistant.helpers.template] Template variable warning: 'dict object' has no attribute 'displaymetric' when rendering '{{ value_json.displaymetric }}'

I believe it is coming from OMG and may be related to #1504 although I believe that was added in v1.5.0 and seems to be this line

I'm running a Heltec WiFi LoRa 32 (V2.1) running RTL_433 which I believe uses the SSD1306 Display. I do have the display turned off.

I do not recall seeing these errors in Home Assistant with OMG v1.5.1

Environment (please complete the following information):

• OpenMQTTGateway version used (V0.9.3, 0.8, development): 1.6
• Library version related to the problem you have (if you have troubles with RF provide the version of RCSwitch library)

[Snuffy2]

I turned on the Display to see if that had any effect and it didn't seem to change anything. The error is still appearing. Another thing I noticed is that displayMetric is not listed as an item in the SSD1306toMQTT JSON when looking with MQTT Explorer. It is listed under WebUItoMQTT and changes when I check/uncheck the Display Metric box in the WebUI.

[DigiH]

This looks like a legacy discovery for displaymetric for SSD1306, from before it was moved to the WebUI. Needs to be removed for SSD1306/moved to WebUI.

[DigiH]

Hi @Snuffy2

would you be able to verify with a test build?

[DigiH]

@Snuffy2

A test build which should fix the warning messages can be installed at

https://docs.openmqttgateway.com/dev/upload/web-install.html

If you could also check the correct switching between metric and imperial units, that would be great.

[Snuffy2]

I installed version 9d8a96 this evening.

• The Template variable warning is no longer showing
• I unchecked Display Metric in the WebUI. The change was shown in MQTT Explorer but the temperatures continue to show in °C

[DigiH]

Thanks for testing @Snuffy2

The displayMetric setting only applies to the alternating device property unit display on the WebUI main page and on the Heltec/LilyGo internal OLED display.

The rtl_433 published MQTT messages will always have temperature_C, which can/should be auto converted to Fahrenheit if so defined in HA.

I was more curious as to whether the switching also works now in the HomeAssistant Gateway Control for the different display on the Heltec and WebUI.

[Snuffy2]

Gotcha. The temperature does show correctly in °F in the WebUI when I uncheck Display Metric.

[DigiH]

Thanks for the confirmations.

Closing