I also have several of these as a replacement for some Tuya sensors I added a power supply to because they ate through batteries. The Sonoff not only has a way better battery life, they also feel and look nicer and the readings are far better. The Tuya sensors were all off by several degrees and the Sonoff are way closer to the real temperature. I cannot recommend them enough.
EarMaster
joined 2 years ago
Also: mains powered devices (lightbulbs, smart plugs, zigbee repeaters) will all act as a repeater in your mesh. Depending on your home it might help to add in a few of them. But keep in mind that this will not magically make your existing devices use them. When setting up your network always pair your permanent powered devices first so they can act as endpoints for your battery powered ones.
For the power state monitoring I can recommend this blueprint, which does everything for you (and maybe even more): https://github.com/leofabri/hassio_appliance-status-monitor
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The console isn't out for a whole month. Indie devs usually don't get dev kits ahead of launch and even if they do it is not a good idea to try to compete with Mario Kart...