Bridge between mqtt and onoff.

Usage: mqtt-onoff [options]

Options:
  -c, --url <value>       connect URL (default: mqtt://localhost:1883)
  -u, --username <value>  MQTT broker username (optional)
  -p, --password <value>  MQTT broker password (optional)
  -t, --topic <value>     MQTT topic (default: onoff)
  -l, --log <value>       extra logging for socket connection issues

Environment variables may be used instead: MQTT_URL, MQTT_USERNAME, MQTT_PASSWORD, MQTT_TOPIC and MQTT_ONOFF_LOG.

A config file named .mqtt-onoff.json may also be used.

{
  "url": "mqtt://localhost:1883",
  "username": "system",
  "password": "***",
  "topic": "onoff/device1",
  "log": 1
}

Configure

Pins are configured by publishing to the topic cmnd/[topic]/configure.

Configuration payload needs to be a JSON string in the following format:

{
  "pins": [
    {
      "topic": "doorbel", // used to compose the MQTT topic
      "gpio": 22, // onoff gpio
      "direction": "in", // onoff direction
      "edge": "none", // onoff edge
      "options": {} // onoff options
    }
  ]
}

More info about these properties can be found here.

At any time individual pins can be configured by publishing a JSON string the following format:

{
  "topic": "doorbel",
  "gpio": 22,
  "direction": "out"
}

Inputs (direction: "in")

An onoff read can be done by publishing any payload (eg. "") to cmnd/[topic]/[pin.topic]. This will publish the input value to tele/[topic]/[pin.topic].

In the logs this is refered to as an R.O.D. (read on deamand).

Watch inputs (direction: "watch")

When the onoff pin is configured an in direction is used. However within mqtt-onoff an onoff watch is setup and values are published to tele/[topic]/[pin.topic].

An R.O.D can also be done on these pins.

Outputs (direction: "out" | "high" | "low")

Publishing "0" or "1" to cmnd/[topic]/[pin.topic] will result in an onoff write. A successful write is acknowledged by the payload being published to tele/[topic]/[pin.topic].