Communicating over LoRa from a RAK4631 to ESP32

WisBlock
1

Hi, I have a RAK4631 that I want to receive messages over LoRa from an ESP32 (which uses an adafruit RFM95W LORA RADIO TRANSCEIVER). Is this possible? Do I just need to make sure that they are on the same frequency? Is there anything I have to do to match baud rates?

2

You need on both side same settings for the LoRa P2P communication:

  • Frequency
  • Spreading Factor
  • Bandwidth
  • Code Rate
  • Preamble Length
  • IQ inversion
  • Syncword

Then it should work.

3

My ESP32 code has a function like LoRa.setSyncWord(0); so that I can set the Syncword, but I don’t see anything like this for the Wisblock code here - WisBlock/examples/RAK4630/communications/LoRa/LoRaP2P/LoRaP2P_TX/LoRaP2P_TX.ino at master · RAKWireless/WisBlock · GitHub

Do you know where to set the SyncWord?

4

The syncword in the SX126x-Arduino library is preset to the default 0x2414.

5

Awesome thanks, got it working with that.