Shelly 2 is discontinued and replaced by Shelly 2.5

The Shelly 2 is fully supported in Tasmota from version 6.2.1.7

⚠️️Special Shelly Attention⚠️️

Do not connect AC power and the serial connection at the same time The GND connection of the Shelly has a 50% chance of being connected to the live AC wire. Connecting serial with your PC will fry your PC.

Do not connect any additional sensors to serial pins. It can at least destroy your Shelly!

Check the correct jumper position before connecting AC power to Shelly 1. If the jumper is set to 12V you will destroy your Shelly!

Shelly 2

An ESP8266 with 2MB flash dual relay device with Energy Monitoring the size of round 45mm.

Templates as of v6.4.1.17

The inbuilt template equals the following: {"NAME":"Shelly 2","GPIO":[0,135,0,136,21,22,0,0,9,0,10,137,0],"FLAG":0,"BASE":47} An alternative template without switch pull-up is: {"NAME":"Shelly 2n","GPIO":[0,135,0,136,21,22,0,0,82,0,83,137,0],"FLAG":0,"BASE":47}

Pullup or no pullup

To disable pullups either use command SetOption62 1 or select the option from the GUI.

Refer to the following issue: https://github.com/arendst/Sonoff-Tasmota/issues/4841