I checked with the App Fing on my smartphone but it showed only my own networks (2,4 GHz and 5 GHz) with that SSID. Maybe it had something to do with the wifi channels. Maybe my router switched my network to another channel. From my experience the ESPs need some time to reconnect in that case. But I...

No, I don't have a mesh running. Just a single router from my internet provider Vodafone (cable network).

Yesterday evening the 2 ESPs with the temperature sensors surprisingly came back to life! I didn't do anything with them - no reset, no power off/on. All of a sudden Grafana showed new measurement values. The one ESP which I had connected to my PC for reading the serial output when booting also star...

The ESPs are not reachable. iobroker itself isn't, too. The Raspberry which is running iobroker also runs Grafana for displaying the measurements. The Grafana website is accessible from the internet.

Hello, over the last 2 years I installed 5 ESP8266 using espeasy in my house. Some measure temperatures, some have a smog sensor and one has a pulse counter; but all of them send their data via MQTT to an iobroker instance. They all were installed at different dates. But the day before yesterday the...