I bought a wislora-n (rak811-n based).
I only see
< BOOT MODE>
in serial port, I couldn’t able to send any command (boot jumper in boot 3,3V position, serial jumper in CRX-CTX).
I tried to flash it, but i got:
Only one tool, the RAK LoRaButton Upgrade Tool V1.0 work with one firmware: RAK811_HF_B_V220.127.116.11, but I unable to flash any other file.
Any help is greatly appreciated.