I badly need help. I wanted to upgrade the firmware of RAK811 and I used the below link.
https://github.com/RAKWireless/RAK811_LoRaNode/blob/master/doc/User%20Manual/WisNode-Lora Quick Start Guide V1.3.pdf
However, after erasing the flash I close the window and now I am not able to join the RAK811 to flash with the correct firmware.
Can you please advice?
Many thanks in advance,