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This seems to be a common problem when using ESP8266 + Mosquitto broker. I also had a perfectly working set-up with multiple ESPs and they suddenly started showing the same...
I also have one of those here at home, but haven't yet analyzed it in detail, since it is quite rare and odd :-) The problem is: It uses a...
The same happened here on Raspberry Pi OS (Raspberry Pi 5), while it worked fine on Linux Mint (PC), even without sudo. Solution: Run your Python program **inside an active...