send/receive data to and from another lora end node while sending data to network server

[sarwadenj]

Description of defect-->

I'm using mbed-os-example-lorawan to send data to assigned network server. However I want my lora nodes to send and receive DATA from another lora end node. How can I configure that. Please guide.

Board: Disco-lrwan1(BL072-LRWAN1)

[ciarmcom]

@sarwadenj This issue has an incomplete or old issue template.For future reference please use an up to date clone of the repository before raising issues. Many thanks.

[ciarmcom]

Thank you for raising this detailed GitHub issue. I am now notifying our internal issue triagers.
Internal Jira reference: https://jira.arm.com/browse/IOTOSM-3648

[maxgerhardt]

My 2 cents: LoRaWAN inherently has a structure with nodes and gateways. Gateways send their transmission (downlink) with the "IQ polarity inversion" option (see here) so that only nodes hear them, which also listen with IQ inversion option, and not other gateways. A node's transmission is however heard by every gateway, since no IQ inversion is done and the radio filters for its own device address.

So with that in place, the only way to achieve a LoRaWAN between two nodes is to modify one of the drivers to act like a gateway, by using the same IQ polarity in listening as the other node uses for sending. But there are other hacks to be done regarding using the device address of your target listener and the content of the header in the LoRaWAN message (there's a message type in there). So I'd totally not recommend this.

Usually when people want to node-to-node communication they use raw LoRa packets. You might e.g. want to try out https://github.com/sandeepmistry/arduino-LoRa with the LoRaReceiver and LoRaSender examples.

[sarwadenj]

@maxgerhardt Thanks!

Is there any way, where end node can send and receive data from end node as well as gateway in one application?