Setting up GPIO pins in openHAB

[CrazyIvan359]

Discussion started in #79 by @Veldhius123

i have change the configuration but it don't work.

at the moment I am not coping very well with it, but it is getting better

gpio:
  polling interval: 60
  debounce: 10

  channel1:
    pin: 26
    name: '{relay}'
    pin mode: 'output'
    resistor: 'off'

this is my openHab configuration

UID: mqtt:topic:openhab:relay
label: Generic MQTT Thing
thingTypeUID: mqtt:topic
configuration: {}
bridgeUID: mqtt:broker:openhab
channels:
  - id: channel1
    channelTypeUID: mqtt:switch
    label: test
    description: ""
    configuration:
      commandTopic: 10.0.10.200/relay/1/set
      stateTopic: 10.0.10.200/relay/1

[CrazyIvan359]

I suggest you read through the documentation of MQTTany and the MQTT binding in openHAB to get more familiar with both. You will also find examples for the MQTT binding on the openHAB forum.

I will give you some examples for the pin you are trying to setup to get you started.

The root topic defaults to being the same as the client id, which defaults to the hostname of the system. You have your topics in openHAB using a root of 10.0.10.200, but that is the address of your MQTT server. From your command prompt pi@raspberrypi: ~ $ you can see that the hostname is raspberrypi, therefore MQTTany is connecting using the name raspberrypi and the root topic is also raspberrypi.

The rest of the topic is also wrong, as I stated in my response in #79. You have removed the topic option and added the name option, but it still isn't going to give you the topic you have in openHAB, that topic is not possible.

If I understand correctly, you want to have several numbered relays configured. Based on that you could use this configuration:

gpio:
  channels:
    pin: [26, 27]  # a list of the pins your relays are connected to, in the order you want them numbered
    name: 'channel{index}'
    pin mode: output
    first index: 1

That will give you GPIO26 on the topic raspberrypi/gpio/channel1 and GPIO27 on topic raspberrypi/gpio/channel2. Bring that into openHAB like this:

UID: mqtt:topic:openhab:channel1
label: Channel 1
thingTypeUID: mqtt:topic
configuration: {}
bridgeUID: mqtt:broker:openhab
channels:
  - id: relay
    channelTypeUID: mqtt:switch
    label: Channel 1 Relay
    description: ""
    configuration:
      commandTopic: raspberrypi/gpio/channel1/set
      stateTopic: raspberrypi/gpio/channel1
      on: ON
      off: OFF

UID: mqtt:topic:openhab:channel2
label: Channel 2
thingTypeUID: mqtt:topic
configuration: {}
bridgeUID: mqtt:broker:openhab
channels:
  - id: relay
    channelTypeUID: mqtt:switch
    label: Channel 2 Relay
    description: ""
    configuration:
      commandTopic: raspberrypi/gpio/channel2/set
      stateTopic: raspberrypi/gpio/channel2
      on: ON
      off: OFF