This user prepared a custom firmware for this gateway a few months ago. I uploaded it to the gateway following the instructions, and everything works fine in HA. If anyone needs help, I’ll open a thread. You need a CP2102 USB to TTL and a small connector to solder onto some pins on the board to connect it to the PC. It’s very simple. Complete instructions and wiring: GitHub - jasperw1996/ambd_sdk_GW018-DM: Release SDK for AmebaD
Hi, sorry for the late reply. Try using a CP2102 instead of a CH340G. I’m not entirely sure that’s the problem, but to rule it out, use the 2102. Also, very importantly, make sure all the pins are properly connected. I spent hours trying to upload the firmware, and the problem was a bad connection on the GND pin. I’ve uploaded the compiled firmware to a repository if you want to try it. In any case, that doesn’t seem to be the problem; it seems like a bad connection or the CH340G itself.