Sending variable to lcd easy esp

[Ziomek Ziomkowski]

Good morning, I'm trying to send a variable from node red to lcd display connected to exp8266.

https://www.letscontrolit.com/wiki/index.php/LCDDisplay

the text is sent in this form to the esp easy

http://192.168.100.152/control?cmd=lcd,1,1,text

[Zenofmud]

So…...

1) what is your issue? 

2) what platform are you using?

3) how are they connected?

4) what nodes are you using?

5) What have you tried? 

6) what versions of NR and node are you using?

7) what type of variable are you sending?

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[David Caparrós]

Hello Ziomek

If you have flashed ESPEASY on your ESP module and you are using the LCD configured trough I2C it accepts HTTP request to turn on/off the display or to send the message.

Just as example I copy you my flow, I capture some power values and when a presence from a sensor is detected turn on the lcd and display some values, once there is no presence the lcd turns off.

[{"id":"21b77e7.330cc82","type":"debug","z":"f16a1e08.38ccc","name":"","active":false,"console":"false","complete":"false","x":670,"y":400,"wires":[]},{"id":"eb845279.9f233","type":"http request","z":"f16a1e08.38ccc","name":"","method":"PUT","ret":"txt","url":"http://192.168.1.28/control?cmd=lcd,1,0,{{{payload}}}W","tls":"","x":850,"y":160,"wires":[[]]},{"id":"ae5cfb87.272e98","type":"delay","z":"f16a1e08.38ccc","name":"","pauseType":"rate","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":true,"x":450,"y":160,"wires":[["89b2f42d.82a648"]]},{"id":"7e532138.504e","type":"delay","z":"f16a1e08.38ccc","name":"","pauseType":"rate","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":true,"x":450,"y":120,"wires":[["5e8c19d.58269e8"]]},{"id":"da9bc219.83ed7","type":"http request","z":"f16a1e08.38ccc","name":"","method":"PUT","ret":"txt","url":"http://192.168.1.28/control?cmd=lcd,1,10,{{{payload}}}A","tls":"","x":850,"y":120,"wires":[[]]},{"id":"f8670330.72818","type":"mqtt in","z":"f16a1e08.38ccc","name":"","topic":"ESP-2/Amp","qos":"2","broker":"32ed8c49.582164","x":230,"y":120,"wires":[["7e532138.504e"]]},{"id":"5c02da6c.fab0a4","type":"mqtt in","z":"f16a1e08.38ccc","name":"","topic":"ESP-2/Watt","qos":"2","broker":"32ed8c49.582164","x":230,"y":160,"wires":[["ae5cfb87.272e98"]]},{"id":"8809dd5.fe42a2","type":"switch","z":"f16a1e08.38ccc","name":"","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"str"},{"t":"eq","v":"1","vt":"str"}],"checkall":"true","outputs":2,"x":710,"y":260,"wires":[["3be690b2.1e03d","9c246c1c.53f38"],["53ee2329.bc671c","6d7b63b4.5ea91c","f965bdd1.d9b6d"]]},{"id":"9c246c1c.53f38","type":"http request","z":"f16a1e08.38ccc","name":"APAGAR LCD","method":"PUT","ret":"txt","url":"http://192.168.1.28/control?cmd=lcdcmd,off","tls":"","x":900,"y":240,"wires":[[]]},{"id":"6fc67f43.12824","type":"http request","z":"f16a1e08.38ccc","name":"ENCENDER LCD","method":"PUT","ret":"txt","url":"http://192.168.1.28/control?cmd=lcdcmd,on","tls":"","x":1070,"y":320,"wires":[[]]},{"id":"5cdb7cea.f566d4","type":"inject","z":"f16a1e08.38ccc","name":"apagar lcd","topic":"","payload":"0","payloadType":"str","repeat":"","crontab":"","once":true,"x":230,"y":360,"wires":[["8809dd5.fe42a2"]]},{"id":"3ac5ba98.ff7bc6","type":"inject","z":"f16a1e08.38ccc","name":"encender lcd","topic":"","payload":"1","payloadType":"str","repeat":"","crontab":"","once":false,"x":230,"y":400,"wires":[["8809dd5.fe42a2"]]},{"id":"aa1cc489.136fc8","type":"rbe","z":"f16a1e08.38ccc","name":"","func":"rbe","gap":"","start":"","inout":"out","x":430,"y":260,"wires":[["8809dd5.fe42a2"]]},{"id":"53275cba.50b5f4","type":"link in","z":"f16a1e08.38ccc","name":"","links":["7a543c24.5204b4"],"x":195,"y":260,"wires":[["aa1cc489.136fc8"]]},{"id":"53ee2329.bc671c","type":"delay","z":"f16a1e08.38ccc","name":"","pauseType":"delay","timeout":"500","timeoutUnits":"milliseconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":890,"y":320,"wires":[["6fc67f43.12824"]]},{"id":"f965bdd1.d9b6d","type":"http request","z":"f16a1e08.38ccc","name":"CLEAR LCD","method":"PUT","ret":"txt","url":"http://192.168.1.28/control?cmd=lcdcmd,clear","tls":"","x":890,"y":280,"wires":[[]]},{"id":"3be690b2.1e03d","type":"change","z":"f16a1e08.38ccc","name":"","rules":[{"t":"set","p":"lcd","pt":"global","to":"off","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":870,"y":200,"wires":[[]]},{"id":"6d7b63b4.5ea91c","type":"change","z":"f16a1e08.38ccc","name":"","rules":[{"t":"set","p":"lcd","pt":"global","to":"on","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":870,"y":360,"wires":[[]]},{"id":"5e8c19d.58269e8","type":"switch","z":"f16a1e08.38ccc","name":"","property":"lcd","propertyType":"global","rules":[{"t":"eq","v":"on","vt":"str"}],"checkall":"true","outputs":1,"x":650,"y":120,"wires":[["da9bc219.83ed7"]]},{"id":"89b2f42d.82a648","type":"switch","z":"f16a1e08.38ccc","name":"","property":"lcd","propertyType":"global","rules":[{"t":"eq","v":"on","vt":"str"}],"checkall":"true","outputs":1,"x":650,"y":160,"wires":[["21b77e7.330cc82","eb845279.9f233"]]},{"id":"32ed8c49.582164","type":"mqtt-broker","z":"","broker":"127.0.0.1","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"willTopic":"","willQos":"0","willPayload":"","birthTopic":"","birthQos":"0","birthPayload":""}]

Take a look on documentation website:    https://www.letscontrolit.com/wiki/index.php/LCDDisplay

It's really simple.

Regards