Custom Board and RAK3172 issues

I have created a custom board and have used Arduino to program the basic OTAA example on all of them They all worked at first but now only one does. It is the only one that is recognized by Arduino and the WiseToolBox. I can see them all using the STM32Cube Programmer app through the UART and have tried re-flashing them. They all reflash, and verify but still same result. Arduino and WisToolBox does not recognize them. Any ideas?

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Ok, fixed the issue. It turns out the modules needed new firmware. Used the STM32 programming software, (you have to completely erase chip before you do next step) downloaded latest RAK3172-E firmware hex. Then I checked with WisToolBox and module was now responding and working well. Downloaded my custom app and repeated 8 more times on others. They all work great now.

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This happened to me as well with my Penguino RAK3172 board. Just came to reply the fix, but I see you already figured it out.

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