Need help >>looking out LIRC intrigration with Mqtt

[bidyut das]

Any one have idea how to implement this..trying to build Mqtt-IR receiver and Mqtt-IR Receiver along with esp8266 chip...UI update via Node red+REST API for mobile App

IR Receiver ............. Remote command for key sense by IR receiver record it to>> LIRC by defining key>>IR code defined by REST API for mobile 

IR Blaster................REST API for mobile >>Node red>>LIRC>>Mqtt payload publish>> esp8266 IR blaster.

[Walter Kraembring]

Actually yes, I have managed to get IR receiving and transmission to work in Node-RED, I run it under Linux in a Raspberry pi

First step is you need to make Lirc work with your specific ir device and the remote controls you want to have support for. In my case, I am using a USB-UIRT device. This step may take a while and is a bit complex in the beginning, I struggled a little while until I had it function well

Next you can install lirc_node contribution by Alex Bain found here: https://github.com/alexbain/lirc_node

git clone git://github.com/alexbain/lirc_node.git

cd lirc_node

npm install

In my case, I installed it to /home/pi/lirc_node

Then in your Node-RED settings.js you add

    functionGlobalContext: {

        lirc_node:require('/home/pi/lirc_node')

        // os:require('os'),

        // octalbonescript:require('octalbonescript'),

        // jfive:require("johnny-five"),

        // j5board:require("johnny-five").Board({repl:false})

    },

Save and restart Node-RED

Depending on your supported remotes & buttons you have added to Lirc, you can create a flow in Node-RED for receiving and sending IR codes

My example below is very simple, I use a Samsung remote.

[{"id":"85a45963.6b54c8","type":"function","z":"a15019c7.f0c418","name":"IR receiver","func":"flow.set('lirc_node', global.get('lirc_node'));\nflow.get('lirc_node').init();\n\n// Listening for commands\nvar listenerId = flow.get('lirc_node').addListener(function(data) {\n  node.warn(\"Received IR keypress '\" + data.key + \"'' from remote '\" + data.remote +\"'\");\n});\n","outputs":"0","noerr":0,"x":630,"y":160,"wires":[]},{"id":"c14837a4.053978","type":"inject","z":"a15019c7.f0c418","name":"","topic":"","payload":"Init","payloadType":"str","repeat":"","crontab":"","once":true,"x":230,"y":160,"wires":[["85a45963.6b54c8"]]},{"id":"bd707658.96a358","type":"function","z":"a15019c7.f0c418","name":"IR transmitter","func":"var command = msg.payload.split(',');\n\nflow.get('lirc_node').irsend.send_once(command[0], command[1], function() {\n  node.warn(\"Sent command!\");\n});\n\nreturn msg;\n","outputs":1,"noerr":0,"x":640,"y":240,"wires":[["a3a1d8a1.0af988"]]},{"id":"a3a1d8a1.0af988","type":"debug","z":"a15019c7.f0c418","name":"","active":true,"console":"false","complete":"false","x":910,"y":240,"wires":[]},{"id":"1a891ca1.ade613","type":"inject","z":"a15019c7.f0c418","name":"","topic":"","payload":"SAMSUNG,KEY_VOLUMEUP","payloadType":"str","repeat":"","crontab":"","once":false,"x":300,"y":240,"wires":[["bd707658.96a358"]]},{"id":"7ddc5214.f9649c","type":"inject","z":"a15019c7.f0c418","name":"","topic":"","payload":"SAMSUNG,KEY_VOLUMEDOWN","payloadType":"str","repeat":"","crontab":"","once":false,"x":320,"y":300,"wires":[["bd707658.96a358"]]}]

[Walter Kraembring]

Obviously you can then go ahead and introduce MQTT and other stuff depending on your requirements & needs

[Anthony Di Giovanni]

Thanks for posting this! Just solved an issue I'd been having. Great POST Walter!

[Piekacz Geoffrey]

Hello, 

I tried to use this node but without success. I did every step in your message but i get the message :  [function:IR receiver] ReferenceError: lirc_node is not defined 

Have I something to put in the config.json file? 

thanks,

Geoffrey

[Zenofmud]

Have you installed LIRC as Walter pointed out in this post on June 17th at 7:23 AM?

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[Piekacz Geoffrey]

I think yes, I have installed lirc and liblircclient_dev, configured modules, config.txt, hardware.conf test it (and it works) with mode2, configured my remote's buttons with irrecords and re-test it with irw command. 

My device is on /dev/lirc0 interface. My guess is something missing in the config.json file. It's like lirc isn't recognize on node-red when I call functions.

[Piekacz Geoffrey]

Done, I tried something and now it works!

Thanks guys!