MQTT Sound Switcher (based on ESP8266 for Home Assistant)

Features

• Sound channel switching firmware for ESP8266 (e.g. Wemos D1 Mini)
• Easy integration to Home Assistant
• Encrypted MQTT communication with TLS 1.1

Project application

Here you see the firmware used on a Wemos D1 Mini with the audio input channel switcher:

Configuration

The firmware must be configured before flashing to ESP8266. Rename src/Firmware/sketches/Production/config-sample.h to src/Firmware/sketches/Production/config.h and change the values like desired.

Flash settings

• Arduino IDE: 2.2.1
• Platform: esp8266 2.4.2
• Board: LOLIN (WEMOS) D1 R2 & mini
• Flash Size: 4M (1M SPIFFS)
• Debug Port: Disabled
• Debug Level: None
• IwIP Variant: v2 Lower Memory
• VTables: Flash
• CPU Frequency: 80 MHz
• Erase Flash: Only Sketch

Example configuration for Home Assistant

Tested with Home Assistant 2023.8.2.

The example block must be added to the mqtt block of your configuration.

- select:
    name: "Soundswitcher"
    state_topic: "/soundswitcher/api/1/id/AAAABBBB/state/"
    command_topic: "/soundswitcher/api/1/id/AAAABBBB/command/"
    options:
      - "1"
      - "2"
      - "3"
      - "4"
    icon: mdi:speaker

Further information

The project is fully documentated on my blog Sicherheitskritisch.