Gokul Periyasamy
Published © CC BY-NC-SA

Interfacing Arduino With Node-RED

This a basic tutorial on Node-RED and Arduino.

IntermediateProtip3 hours37,492
Interfacing Arduino With Node-RED

Things used in this project

Hardware components

Arduino UNO
Arduino UNO
×1
MQ-7
×1
Jumper wires (generic)
Jumper wires (generic)
×1

Software apps and online services

Arduino IDE
Arduino IDE
Node.js
Node-RED
Node-RED
This is installed by Node.js
Google Chrome Browser

Story

Read more

Schematics

Arduino- Gas Sensor

http://osoyoo.com/wp-content/uploads/2016/08/MQ5_1_bb.png

Code

Arduino Code

Arduino
To read the analog value
const int AOUTpin= 0;//the AOUT pin of the CO sensor goes into analog pin A0 of the arduino
int value;

void setup() 

{
Serial.begin(57600);//sets the baud rate
pinMode(AOUTpin, INPUT);//sets the pin as an input to the arduino
}

void loop()
{
value= analogRead(AOUTpin);//reads the analaog value from the CO sensor's AOUT pin
Serial.print("CO value: ");
Serial.println(value);//prints the CO value
delay(60000);
}

Node-RED program

JavaScript
[{"id":"d6230d5f.c05e","type":"serial in","z":"b9075383.db257","name":"","serial":"1b8769a6.621dc6","x":91,"y":135,"wires":[["ea730c90.ebc4b","84c15113.4ecec","e146cbcf.251818"]]},{"id":"ea730c90.ebc4b","type":"debug","z":"b9075383.db257","name":"","active":true,"console":"false","complete":"false","x":501,"y":274,"wires":[]},{"id":"e146cbcf.251818","type":"twitter out","z":"b9075383.db257","twitter":"","name":"Tweet","x":689,"y":144,"wires":[]},{"id":"84c15113.4ecec","type":"ui_text","z":"b9075383.db257","group":"90f1c978.bba628","order":0,"width":0,"height":0,"name":"CO in PPM","label":"Arduino Reading","format":"{{msg.payload}}","layout":"col-center","x":467,"y":41,"wires":[]},{"id":"1b8769a6.621dc6","type":"serial-port","z":"b9075383.db257","serialport":"COM7","serialbaud":"57600","databits":"8","parity":"none","stopbits":"1","newline":"\\n","bin":"false","out":"char","addchar":false},{"id":"90f1c978.bba628","type":"ui_group","z":"b9075383.db257","name":"CarbonMonoxide in Atmosphere","tab":"93b83a33.771108","disp":true,"width":"9"},{"id":"93b83a33.771108","type":"ui_tab","z":"b9075383.db257","name":"Home","icon":"dashboard"}]

Credits

Gokul Periyasamy

Gokul Periyasamy

1 project • 3 followers
Maker

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