An IoT smart switch project that allow remote activation of 2 relay channels with redundancy through different interface solutions. It provides a WiFi connection acessible through: Telegram bot commands, HTML plus Message Queuing Telemetry Transport (MQTT) Broker or local webserver.
The following programs are available:
- WiFi relay - Telegram
- WiFi relay - MQTT
- WiFi relay - webserver
- WiFi relay - Telegram and MQTT
- WiFi relay - Telegram, MQTT and webserver
The physical experiment is presented bellow:
The HTML page for local and MQTT commands:
The Telegram bot interface:


