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Provide ESP8266 based Sonoff by [iTead Studio](https://www.itead.cc/) and ElectroDragon IoT Relay with Serial, Web and MQTT control allowing 'Over the Air' or OTA firmware updates using Arduino IDE.
Version 2.0 and up support the following devices with Serial, Web and MQTT control:
- iTead Sonoff Basic
- iTead Sonoff RF
- iTead Sonoff SV
- iTead Sonoff Dual
- iTead Sonoff TH10/TH16 with temperature sensor
- iTead Sonoff Pow
- iTead Sonoff Touch
- iTead Sonoff 4CH
- iTead S20 Smart Socket
- Electrodragon IoT Relay Board
The following features are available:
- Multiple devices can be addressed by MQTT ```GroupTopic```
- Firmware upload by OTA or via web page upload
- Expanded Status messages
- UDP syslog messages can be filtered on program name starting with ```ESP-```
- The button can send a different MQTT message defined with ```ButtonTopic```
- Initial Wifi setup by user_config.h, Serial, Smartconfig, Wifi manager or WPS config
- A web server provides control of Sonoff and contains a firmware upload facility
- Support for DHTxx or DS18B20 temperature sensors as used in Sonoff TH10/TH16
- Telemetry data can be send using optional different prefix from status messages
- Native Domoticz MQTT support
- Amazon Echo (Alexa) support