My PWS, which uses a 3G connection to the net and an Arduino controller, suddenly stopped reporting to WU on July 19th (Australian). I had originally presumed it was a winter battery issue, but phone usage logs showed it had been vainly trying to send reports. I tracked this down to an issue: it was unable to connect to the weather underground server port 80. It normally does this by first sending a AT+CHTTPACT="weather station.wunderground.com",80 sequence to the 3G device. This normally completes correctly, but now for some reason fails with an undocumented error code (232).
It's not a hardware fault, as the spare controller module and 3G connection adapter shows the same behaviour. The unit works fine sending the same connection request to the PWS weather server and others.
I have a PWS attached via wifi (esp8266) rather than 3g on my roof, and that talks happily to the same WU server/port. (Doesn't use AT commands).
Is anyone aware of any change WU might have made in that timeframe that might have broken connections by some hardware platforms, in particular 3g connected. And solutions?
Thanks, John