Wanted to follow up on this, I'm currently troubleshooting with Ecowitt on the situation that I cannot update my my GW2000 which is still on 2.1.8.
I tried your suggestion above, and still no go.
It seems that Ecowitt is not receiving the FW request from my device, and it is suspected that my router is blocking the GW2000. I'm not convinced this is the issue yet, however, I wanted to ask (any may start another thread if someone can't confirm here), how many of you are using ethernet only connectivity for the GW2000 and upgrading FW without issues?
This is currently the way my setup is, my GW2000 has no WiFi connection (wifi boxes are empty), and just ethernet. Wonder if this could be a bug, but wanted to confirm here.
Enabling the Wifi and trying to update, is my next step, but have not gotten around that yet.