I have a ceiling light attached to a Tasmota-flashed Shelly and want it to be on whenever the device gets power (again). Much like Hue bulbs can be defined to wake up lit up. How can I achieve this?
Tasmota Rules are your friend. To achieve the desired outcome, put
Rule1 ON Power1#boot DO POWER1 1 ENDON Rule1 1
in the Console.
Rule1 1 activates the respective rule. Also make sure that POWER1 is the right switch altogether.