Firstly, I am a newbie from using Node Red,
I got 4 DHT22 sensors connected wirelessly to a TZ-RD05. And the TZ-RD05 is connected to my raspberry pi 3 through a serial port.
I have the data display is a string like in the picture. Can anyone help me to convert that string to a usable value? (The string is in RSSI value format and contains id, tag, check code, end code and the value of temperature and humidity).
After some quick learning some tutorials, I have an idea of adding some node such as "switch", "split", "set payload"... But have no idea how it works yet.
Thank you for any help.