I think that your problems is that your gateway is mono channel and your node is traying to send Join Request on 64 channels. The probability of hitting that channel is complicated. You should try to block the unused channels in the node on REGIONX...

Hi @Peter Simpson​ I limited the channels by modifying the RegionAU915.c file in the RegionAU915InitDefaults function. I guess you have to modify the one in your region. This Is not recommended but accelerates "join accept" . //SUB BAND 1 ...

My advice is to usethe test codes (STM32CubeExpansion_LRWAN_V1.2.1), open the projects in either IAR, KEIL or SW4STM32 and edit them for your needs.Cheers.

My advice is to use the test codes (STM32CubeExpansion_LRWAN_V1.2.1), open the projects in either IAR, KEIL or SW4STM32 and edit them for your needs.Cheers.