Connecting the radio module to the NodeMCU microcontroller via UART:
- D7 (NodeMCU) <—> Tx (YL-800N).
- D8 (NodeMCU) <—> Rx (YL-800N).
From the received package, you can see the main data such as:
- Sender address
- The indicator of the level of the received signal.
- The size of the payload.
- Received useful information.