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MQTT controllable switches

This usermod allows controlling switches (e.g. relays) via MQTT.

Usermod installation

Copy the file usermod_mqtt_switch.h to the wled00 directory.
Register the usermod by adding #include "usermod_mqtt_switch.h" in the top and registerUsermod(new UsermodMqttSwitch()); in the bottom of usermods_list.cpp.

Example usermods_list.cpp:

#include "wled.h"
#include "usermod_mqtt_switch.h"

void registerUsermods()
{
  usermods.add(new UsermodMqttSwitch());
}

Define pins

Add a define for MQTTSWITCHPINS to platformio_override.ini. The following example defines 3 switches connected to the GPIO pins 13, 5 and 2:

[env:livingroom]
board = esp12e
platform = ${common.platform_wled_default}
board_build.ldscript = ${common.ldscript_4m1m}
build_flags = ${common.build_flags_esp8266} 
   -D LEDPIN=3
   -D BTNPIN=4
   -D RLYPIN=12
   -D RLYMDE=1
   -D STATUSPIN=15
   -D MQTTSWITCHPINS="13, 5, 2"

Pins can be inverted by setting MQTTSWITCHINVERT. For example -D MQTTSWITCHINVERT="false, false, true" would invert the switch on pin 2 in the previous example.

The default state after booting before any MQTT message can be set by MQTTSWITCHDEFAULTS. For example -D MQTTSWITCHDEFAULTS="ON, OFF, OFF" would power on the switch on pin 13 and power off switches on pins 5 and 2.

MQTT topics

This usermod listens on [mqttDeviceTopic]/switch/0/set (where 0 is replaced with the index of the switch) for commands. Anything starting with ON turns on the switch, everything else turns it off. Feedback about the current state is provided at [mqttDeviceTopic]/switch/0/state.

Home Assistant auto-discovery

Auto-discovery information is automatically published and you shoudn't have to do anything to register the switches in Home Assistant.

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