Firmware update
Every guide on this site about “Firmware update”, newest first.
- ShellyShelly BLU device unresponsive after a failed update: rescue via bootloader modeIf a BLU device's firmware update aborts, the official documentation says it stays in bootloader mode. The update can be repeated from there: forget the device in your phone's Bluetooth settings, reinsert the battery, select it in the Shelly Debug app within about 40 seconds and start a slow OTA update. Shelly recommends an Android phone for this.Battery-powered BLU devices, e.g. BLU TRV, BLU Button, BLU H&T, BLU Door/Window, BLU Motion ·
- ShellyShelly firmware update fails or is stuck at 99% (Gen3/Gen4): what helps and what doesn'tThe update aborts, reports an error or stays at 99%. First reboot and start the update from the local web interface instead of the app, check the Wi-Fi signal, briefly turn off Eco mode and update devices one at a time. Never cut power during an update. If that doesn't help, Shelly support is the right contact for Gen2+; according to the sources a factory reset does not fix it.Gen3 and Gen4 devices (e.g. Plug S Gen3, Plug M Gen3, Pro 3EM, 2PM Gen4); much of it also applies to Gen2/Plus ·
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