One of my neighbors uses a device which sends out a 433Mhz message eacht 5 minutes. I detected the signal with homehuino, however the device was not supported. My guess was that it was a weather sensor, which other devices would send data with such frequent interval?
So last night I was playing with rtl_433, see other topic, and this device was recognized by the software. Indeed it was a weather sensor, actually two devices matched the protocol, but since one of the devices gave a wrong humidity value I could rule out that one.
The device detected is a Kedsum temperature and humidity sensor, or a device which uses the same protocol/rebranded device.
As I don’t know which of my neighbors owns the device I can’t validate the exact make and model. However as I don’t own an outdoor temperature/humidity sensor I thought it would be interesting to implement this device in Pimatic and use it for my own benefits.
I used the rtl_433 source code for the device as a reference to implement the protocol in homeduino, and now I have the outside temperature and humidity available in pimatic.
One question I have though. In which format does pimatic expect the temperature to be delivered? The device has the temperature in Fahrenheit encoded in the signal, however some other temperature devices show the temperature in Celsius. I can’t remember I ever configured a temperature scale.