Provide ESP8266 based itead Sonoff with Web, MQTT and OTA firmware using Arduino IDE or PlatformIO
C++ C Processing Python Makefile Objective-C
arendst Updated esp-epaper library
Updated esp-epaper library
Latest commit b031e2f Aug 14, 2018


Alternative firmware for ESP8266 based devices like iTead Sonoff with web, timers, 'Over The Air' (OTA) firmware updates and sensors support, allowing control under Serial, HTTP, MQTT and KNX, so as to be used on Smart Home Systems. Written for Arduino IDE and PlatformIO.

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Build Status

Current version is 6.1.1c - See sonoff/_releasenotes.ino for release information and sonoff/_changelog.ino for change information.



A Sonoff device is not a toy. It uses Mains AC so there is a danger of electrocution if not installed properly. If you don't know how to install it, please call an electrician. Remember: SAFETY FIRST. It is not worth to risk yourself, your family and your home if you don't know exactly what you are doing. Never try to flash a Sonoff device while it is connected to MAINS AC.

We don't take any responsibility nor liability for using this software nor for the installation or any tips, advice, videos, etc. given by any member of this site or any related site.

Quick Install

Download one of the released binaries from and flash it to your hardware as documented in the wiki.

Important User Compilation Information

If you want to compile Sonoff-Tasmota yourself keep in mind the following:

  • Only Flash Mode DOUT is supported. Do not use Flash Mode DIO / QIO / QOUT as it might seem to brick your device. See Wiki for background information.
  • Sonoff-Tasmota uses a 1M linker script WITHOUT spiffs 1M (no SPIFFS) for optimal code space. If you compile using ESP/Arduino library 2.3.0 then download the provided new linker script to your Arduino IDE or Platformio base folder. Later version of ESP/Arduino library already contain the correct linker script. See Wiki > Prerequisite.
  • To make compile time changes to Sonoff-Tasmota it can use the user_config_override.h file. It assures keeping your settings when you download and compile a new version. To use user_config.override.h you will have to make a copy of the provided user_config.override_sample.h file and add your setting overrides. To enable the override file you will need to use a compile define as documented in the user_config_override_sample.h file.

Version Information

  • Sonoff-Tasmota provides all (Sonoff) modules in one file and starts with module Sonoff Basic.
  • Once uploaded select module using the configuration webpage or the commands Modules and Module.
  • After reboot select config menu again or use commands GPIOs and GPIO to change GPIO with desired sensor.

Migration Information

See wiki migration path for instructions how to migrate to a major version. Pay attention to the following version breaks due to dynamic settings updates:

  1. Migrate to Sonoff-Tasmota 3.9.x
  2. Migrate to Sonoff-Tasmota 4.x
  3. Migrate to Sonoff-Tasmota 5.14
  4. Migrate to Sonoff-Tasmota 6.x

Support Information

See Wiki for more information.
See Community for forum and more user experience.

The following devices are supported:

Firmware Release Information

Different firmware images are released based on Features and Sensors selection guided by code and memory usage.

  • The Minimal version allows intermediate OTA uploads to support larger versions and does NOT change any persistent parameter.
  • The Classic version allows single OTA uploads as did the previous Sonoff-Tasmota versions.

Available Features and Sensors

Feature or Sensor sonoff classic minimal knx allsensors
MY_LANGUAGE en-GB x x x x x
USE_DOMOTICZ x x - x x
USE_MQTT_TLS - - - - -
USE_KNX - - - x -
USE_TIMERS x - - x x
USE_TIMERS_WEB x - - x x
USE_SUNRISE x - - x x
USE_RULES x - - x x
USE_ADC_VCC x x x x x
USE_DS18B20 x x - x -
USE_DS18x20 - - - - x
USE_DS18x20_LEGACY - - - - -
USE_I2C x x - x x
USE_SHT x x - x x
USE_SHT3X x x - x x
USE_HTU x x - x x
USE_LM75AD x - - x x
USE_BMP x x - x x
USE_BME680 - - - - x
USE_SGP30 x - - x x
USE_BH1750 x x - x x
USE_VEML6070 - - - - x
USE_TSL2561 - - - - x
USE_SI1145 - - - - x
USE_ADS1115 - - - - x
USE_ADS1115_I2CDEV - - - - -
USE_INA219 - - - - x
USE_MGS - - - - x
USE_SPI - - - - -
USE_MHZ19 x x - x x
USE_SENSEAIR x - - x x
USE_PMS5003 x - - x x
USE_NOVA_SDS x - - x x
USE_PZEM004T x - - x x
USE_SDM120 - - - - x
USE_SDM630 - - - - x
USE_IR_REMOTE x x - x x
USE_IR_HVAC - - - - x
USE_IR_RECEIVE x - - x x
USE_WS2812 x x - x x
USE_WS2812_DMA - - - - -
USE_ARILUX_RF x - - x x
USE_SR04 x - - x x
USE_RF_FLASH x - - x x

Typical file size

ESP/Arduino library version sonoff classic minimal knx allsensors
ESP/Arduino lib v2.3.0 538k 490k 407k 548k 562k
ESP/Arduino lib v2.4.0 543k 498k 414k 553k 565k
ESP/Arduino lib v2.4.1 544k 500k 416k 555k 567k

See Tasmota ESP/Arduino library version related issues for more information.


You can contribute to Sonoff-Tasmota by

  • providing Pull Requests (Features, Proof of Concepts, Language files or Fixes)
  • testing new released features and report issues
  • donating to acquire hardware for testing and implementing or out of gratitude



Libraries Used

Libraries used with Sonoff-Tasmota are:

People inspiring me

People helping to keep the show on the road:

  • David Lang providing initial issue resolution and code optimizations
  • Heiko Krupp for his IRSend, HTU21, SI70xx and Wemo/Hue emulation drivers
  • Wiktor Schmidt for Travis CI implementation
  • Thom Dietrich for PlatformIO optimizations
  • Marinus van den Broek for his EspEasy groundwork
  • Pete Ba for more user friendly energy monitor calibration
  • Lobradov providing compile optimization tips
  • Flexiti for his initial timer implementation
  • reloxx13 for his TasmoAdmin management tool
  • Joachim Banzhaf for his TSL2561 library and driver
  • Gijs Noorlander for his MHZ19 and SenseAir drivers
  • Emontnemery for his HomeAssistant Discovery concept and many code tuning tips
  • Aidan Mountford for his HSB support
  • Daniel Ztolnai for his Serial Bridge implementation
  • Gerhard Mutz for his SGP30 and Sunrise/Sunset driver
  • Nuno Ferreira for his HC-SR04 driver
  • Adrian Scillato for his (security)fixes and implementing and maintaining KNX
  • Gennaro Tortone for implementing and maintaining Eastron drivers
  • Raymond Mouthaan for managing Wemos Wiki information
  • Norbert Richter, Frogmore42 and Jason2866 for providing many issue answers
  • Many more providing Tips, Pocs or PRs


This program is licensed under GPL-3.0