Button Usage - RTurala/Sonoff-Tasmota GitHub Wiki

The main button on a Sonoff-Tasmota flashed module provides the following functionalities:

• 1 short press: Toggles the relay either directly or by sending a MQTT message like cmnd/sonoff/POWER1 ON. This will blink the LED twice and sends a MQTT status message like stat/sonoff/POWER1 ON. If cmnd/sonoff/ButtonRetain on has been used the MQTT message will also contain the MQTT retain flag.

• 2 short presses: Toggles the relay 2 if available on the device like Sonoff Dual. This will blink the LED twice and sends a MQTT status message like stat/sonoff/POWER2 on.

• 3 short presses: Start Wifi smartconfig allowing for SSID and Password configuration using an Android mobile phone with the ESP8266 SmartConfig app. The LED will blink during the config period. A single button press during this period will abort and restart sonoff.

• 4 short presses: Start Wifi manager providing an Access Point with IP address 192.168.4.1 and a web server allowing the configuration of Wifi. The LED will blink during the config period. A single button press during this period will abort and restart sonoff.

• 5 short presses: Start Wifi Protected Setup (WPS) allowing for SSID and Password configuration using the router's WPS button or webpage. The LED will blink during the config period. A single button press during this period will abort and restart sonoff.

• 6 short presses: Will restart the module

• 7 short presses: Start OTA download of firmware. The green LED is lit during the update

• Pressing the button for over forty seconds: Reset settings to defaults as defined in user_config.h and restarts the device

The button is connected to GPIO 0 (NodeMCU pin D3)