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Hello, I’m using an RN2483 together with a PIC and a temperature/humidity sensor. The RN2483 is transmitting 2 bytes for temperature and 2 bytes for humidity. I can see the data at the TTN console. The payload is 12 34 56 78 for example.
Now I want to transmit the data to Cayenne and show the temperature and the humidity.
How to do?
Where do I have to implement the formula to convert from 16 bit to float?
You need to format the data on the node using the LPP format. This basically involves adding a few ‘header’ bytes to each value and making sure it uses the right precision.
For instance for the temperature you use (hex values):
01 67 00 FF (channel 1, temperature, 25.5 C)
Thanks for the hints.
So in my application I have to calculate the temperature/humidity (for example +20.4 / 45.6), multiply them by ten, put these values in 2 bytes (temperature) and 1 byte (humidity), in TTN payload decoder I have to add some header according the LPP format and that’s it?