MQTT and Fahrenheit to Celsius

[Herbert Altmann]

Hi All,

i have a Question about the MQTT-Binding. I have a FineOffset WH1080 Weather station. I get the weatherdata over weewx. Now i have mqtt in weewx implemented and it is running good, but the temperatures are in Fahrenheit and i need it in Celsius for Openhab. Do i have to convert it on my own or is there a way to automaticly convert the values?

Best Regards,

Herbert

[Ben Jones]

There is nothing in openHAB for automatically converting metric types. So you will need probably need two items in openHAB, one which is bound to the F incoming feed, and a second which is updated by a rule. The rule would be triggered by any update to the F item. Hope that makes sense.

[Herbert Altmann]

Hello Ben,

thanks for your help, but in the group of weewx the user mwall helped me. He extended the mqtt export in weewx with a automatic conversion.

https://groups.google.com/forum/m/?hl=de#!topic/weewx-user/HcuwVoGdQBYBye

Thanks,

Herbert