RAK4270 change Sync word


Currently we are working with LoRaWAN networks in private mode, we have decided to test different nodes since we are working with the RN2903 microchip lorawan module and we want to change it, nevertheless i can’t find the command to change the sync word in the RAK4270, can it be changed?

Thank you in advance!

There is no option to change the sync word with the standard AT command firmware. If you want to do such changes, there is the option to create a custom firmware using our RUI

OK, I already Lear how to create a custom firmware using the RUI and ime editing the files for the RAK4270. Buts I don’t see any option related with the sync word or related with public or private network.

Wbtat do I need to add?

Hi @sebas143, sync word is not supported yet. But you can explore sx1262 libraries provided by semtech https://os.mbed.com/teams/Semtech/code/SX126xLib/ and do your own firmware development for private network.

Here’s a guide on low-level development for RAK4270 like choice of bootloader, etc. https://docs.rakwireless.com/Product-Categories/WisDuo/RAK4270-Module/Low-Level-Development/

Definitely, you need the RAK4270 schematic so you can properly set your STM32 IO pins. Here’s the link to the schematic https://downloads.rakwireless.com/LoRa/RAK4270/Hardware-Specification/

That’s a lot of work and we need to deliver a thousand devices before the year ends. Currently we are working with water meter and we had a trouble with the RN2903 from Microchip. Currently we don´t have the time to do this kind of development. I think we are going to try a different Module.

Thank you.