The firmware of my module supports UART
printf() which I think could be good for debugging, but how could the messages be read? I'm currently using just a USB-to-Serial cable. I've tried using PuTTy, but all I see is gibberish, e.g.,
▒)▒ɜ▒] ▒▒▒▒9~▒!▒▒!▒▒▒▒▒▒J=▒▒H▒] ▒,▒▒H9▒ ▒▒H▒▒Ȇ
Is PuTTy actually right for the job?