Shelly Plus 1

Shelly Plus 1

The Shelly Plus 1 is a compact WiFi smart relay module designed for in-wall or DIN-rail installation. Based on the ESP32-C3, it offers WiFi and Bluetooth connectivity with a 16A relay output, making it one of the most popular devices for Tasmota-based home automation.

Key Features

• ESP32-C3 RISC-V single-core at 160MHz with WiFi and BLE 5.0
• 16A/240V relay — enough for most household loads
• Dry contact input — connect physical switches (momentary or toggle)
• Compact form factor — fits behind wall switches or on DIN rail
• 100-240V AC or 12V DC power input
• Screw terminals for easy wiring

Tasmota Compatibility

• Flash via serial header (requires soldering to test pads) or via mgos-to-tasmota OTA method
• Template: {"NAME":"Shelly Plus 1","GPIO":[0,0,0,0,192,0,0,0,0,0,0,0,0,0,0,0,0,0,0,224,0,576],"FLAG":0,"BASE":1}
• Full relay control, switch input, and LED status via Tasmota

Wiring Options

As a Light Switch

• L (Line) → Switch input terminal
• Load wire → Relay output
• N (Neutral) required

As a Dry Contact Relay

• 12V DC power input
• Relay output as potential-free dry contact
• Switch input for external trigger

Use Cases

• Smart light switching (with existing wall switch retained)
• Garage door control
• Irrigation valve control
• Boiler/heater switching