Hi guys, I recently acquired a RAK811 v1.2 and currently testing it. I followed the guide (https://downloads.rakwireless.com/en/LoRa/RAK811/Application_Notes/) on how to get started with RAK811.
I flash the bootloader then the firmware (RUI_RAK811_V220.127.116.11.H_Release). However, after upgrading successfully, my RAK811 does not respond to my commands. Even if I reset it, it would not show any data. I am also cautious with boot, 3.3V, and CND pins. Can someone guide me through this?