Hopefully some useful information for other LSC smart connect plug buyers that want to flash them to Tasmota and use them with Homey through MQTT without the need for the Tuya cloud / app.
Today I bought some LSC Smart Connect plugs, and they turned out to be v2.0. They flash fine with Tasmota (https://youtu.be/dt5-iZc4_qU), and can be upgraded OTA to the latest version.
To be able to use them with Homey through MQTT, I had to apply the following template in the console:
backlog template {“NAME”:“Sonoff Basic”,“GPIO”:[0,0,0,0,56,0,0,0,21,17,0,0,0],“FLAG”:0,“BASE”:18}; PowerRetain 1; SensorRetain 1; SwitchRetain 1; ButtonRetain 1; SensorRetain 1; module 0
This is because the button inside this plug is connected to a different GPIO (specifically button1 to GPIO13). This template then makes it possible to add them as a Sonoff Basic through the iTead Sonoff app (ITEAD Sonoff) via MQTT.