using xdot with propitiatory stack (without lorawan)

[Tom Z]

Hi

is it possible to work with the xdot using a custom / propitiatory stack without using LoRaWaN?

[Jason Reiss]

Yes it is possible.

Radio drivers can be found here.
https://github.com/ARMmbed/mbed-semtech-lora-rf-drivers

They are used in the mbed-os lorawan implementation which can be used as a reference for using the drivers.
https://github.com/ARMmbed/mbed-os-example-lorawan

[Tom Z]

Hi Jason,

Is it possible to create a custom AT+Command on the xDot?

Currently, our end-device is wired via UART and we work with the lorawan stack with AT+Command. But for an upcoming project, we need to use proprietary msg format (as to my previous message in this thread). But as it seems, from our private conversation, we will need to re-wire our board to connect to SPI which complicate things for us and requires board modification.

So I had this wild idea, if we could write code to the xdot or even wrap it as an AT+Command, we can keep our current wiring, and work the radio from the xDot and not our MCU.

Does this make sense? is it possible?

Thanks

[Jason Reiss]

The mbed-semtech-lora-rf-drivers would be used in a firmware deployed on xDot.

If you connected to the xDot via SPI to attempt to access the LoRa radio you would need SPI to SPI application on xDot.

This project implements a custom shell for use with mbed-os on xDot/mDot to command it via UART.
https://github.com/MultiTechSystems/mbed-os-lorawan-tinyshell

The LoRaWAN layer can be removed or customized.

[Tom Z]

Thanks for the quick and accurate reply Jason, much appreciated.

Yea we do not have SPI to SPI wiring on our board right now and adding it not really an option.

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