Minimalistic MQTT to 433mz remote socket gateway for ESP8266

DEPRECATED: Use https://github.com/schneebonus/ESP8266-MQTT-To-433mz-Gateway for a better version without hardcoded devices.

A robust and minimalistic mqtt to 433mhz gateway for the esp8266. Enables cheap wireless sockets from the DIY store to be controlled via the MQTT home automation server. This project follows a minimalist approach, designed solely for reliability. Therefor there is no fancy hotspot, ui or webapp.

Requirenments

• ESP8266 board definition ( https://arduino-esp8266.readthedocs.io/en/latest/installing.html )
• PubSubClient.h ( https://pubsubclient.knolleary.net/ )
• RCSwitch.h ( https://github.com/sui77/rc-switch )
• ESP8266WiFi.h ( https://github.com/esp8266/Arduino/tree/master/libraries/ESP8266WiFi )
• Ticker.h ( https://github.com/esp8266/Arduino/tree/master/libraries/Ticker )

Install

• set wifi settings (ssid and passsword)
• set mqtt settings (mqttServer, mqttPort, mqttUser, mqttPassword)
• set 433mhz devices (deviceCount, devices)
• deploy to your esp8266

Update devices

Just update the configuration and re-deyploy the project to your esp8266:

• set 433mhz devices (deviceCount, devices)
• deploy to your esp8266

There is no webapp or api.

Background information

• 433mhz sender is expected to be on port 9 of the esp8266
• main loop has to finish every cycle in 10 seconds or the watchdog restarts the device
• if wifi reconnect fails 5 times in a row, the revice restarts
• there are no debugging outputs or serial prints

Further Improvements:

• MQTT over TLS ( + verify certificate fingerprint )
• port project to esp32 and use firmware encryption to protect the passwords
• publish sensor values to mqtt channels
• publish "i am alive" to mqtt channels
• lite version without 433mhz for sonoff remotes