mgos-to-tasmota | minimal firmware for OTA flashing Tasmota

⚠ This application should generally be safe to use for all supported devices. Still, overwriting a device's boot loader via OTA update is a risky operation. If something unexpected fails, your device may be bricked, unless you know how to flash a new firmware over a wired connection. ℹ You can go back to Mongoose OS via OTA as well, using this firmware, but be aware that if something fails, your device may be bricked, if you don't know how to flash a new firmware over a wired connection. Instead of flashing the device manually (see below), you may try the new automagic flashing script. The script requires Python 3 to be installed on your computer. After downloading the script, run python3 flash-shelly.py -a from the download location. All Shelly devices with stock firmware, which are connected to the same WIFI network, will be found. For each device that is found, you will be asked if you like to convert it. Use python3 flash-shelly.py -a -t haa or python3 flash-shelly.py -a -t espurna to install alternate targets. ⚠ The script is still in an early testing stage, and I would appreciate your feedback. If you want to give feedback, please open an issue. Before flashing this firmware, connect your device to a WIFI network with internet access. From your browser, open the update URL for your device from the table below. Replace shellyip with the IP address of your Shelly. The device will restart one or two times and attempt to download the traget firmware. If this download succeeds, the device will restart again, and you will see a new WIFI network labeled tasmota-????, HAA-????, or ESPURNA-????. This process should take no longer than 4 - 5 minutes, depending on your network connection. If you replace mg2tasmota by mg2haa in the update URLs, your device will install the Home Accessory Architect firmware instead of Tasmota. For mg2espurna instead of mg2tasmota, ESPurna Firmware will be installed.
You can compile a binary version of this firmware using mos tools. Once installed, clone this repository and run mos build --build-var MODEL=Shelly1 --build-var TARGETFW=tasmota --platform esp8266 to create a binary for e.g. a Shelly1 switch located in build/fw.zip.