RAK4631 multiple transmitters, one receiver

WisBlock
1

I am planning to purchase 5 additional RAK4631 units.
We are going to set the settings to 4 transmitters and 1 receiver.
So can I get RSSI values of 4 transmitters from one receiver?
(Example output from receiver) EX. TX1 RSSI: -64, TX2 RSSI: -32, TX3 RSSI: -17, TX4 RSSI: -89

2

Welcome to the forum @park

Yes, you will see the RSSI and SNR levels of the 4 transmitters on the receiver.
You might want to use a payload that contains a device ID so you know which packet is from which transmitter.

3

Thank you very much for your quick response!
So is there anything I should consider outside of id and transmission time to avoid conflict?

4

Thank you so much for your quick reply! So, are there any other factors besides the ID and transmission time that I should consider to avoid collisions?

All devices must be set to LoRa P2P mode, and using the same

  • frequency
  • Spreading Factor
  • Bandwidth
  • Preamble Length
  • Code Rate

You can set these with an AT command AT+P2P=....

The receiver must be set to RX mode with AT+PRECV=65533

The transmitters can send with AT+PSEND=30303031

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