Hi all, we are currently working on a RAK5010 with custom board setup. We had a working setup with another module. We are not sure why but this module stopped working. We then thought we had damaged it somehow eventhough special care was taken everytime the module was handled. We had another module for replacement, which out-of-the-box never gave correct signal. When putting AT+CSQ?, we always get +CSQ 99,99 as an answer. It looks like this other RAK5010/BG96 is also faulty, as the same code and SIM card were working on the other board.
So, to be sure it was not our code, we decided to upload the RAK5010 default software and tried with Termite to try via serial communication with PC. Here is what we got :
At this point we highly suspect that the board itself is faulty (perhaps the track of the antenna is not properly soldered ?).
We are kind of surprised that both modules are that fragile, since as already mentioned special care was taken, and also that the second module was literally brand new when programmed, and never worked…
Any ideas on your side, of what could have caused this ?
Thanks for the help.