Analog Sensor Reading| Arduino|Node-Red| Serial Coomunication|Node_Red-UI

this tutorial shows you how to read analog sensors awith an arduino board and send data to Node-red dashboard via serial communication. You need to install Nodejs in your computer before installing node-red.

This is the arduino code used .
=================================

int newval = 0;
void setup() {
// Initialize Serial port
}

void loop() {
newval = newval+4;
if(newval == 500){
newval=0;
}
int fixed =40;
int sensorValue = analogRead(A0);
int sensorValue1 = analogRead(A1);
// Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
// float voltage = sensorValue * (5.0 / 1023.0);
delay(2000);
}

This is the node used in node-red . Copy them and paste in node-red flows
==========================================

[mohammadhaque]

Thank you, you solved my problem, I was having trouble sending serial data in JSON format and your arduino code did the trick

[ogirdor]

Quick video and very helpful, thanks bro

[batchrocketproject]

Thanks, nice project covering several useful areas. 👏

[anttiryts]

I'm confused with the A/AIN numbers. I think A1 is AIN2. For using this pin do I configure number 1 or 2 to node-red?

[vitoraugusto]

can i use this with PiR MOVIMENT DETECTION SENSOR ?

[duartecancela]

It is possible in node-red to read and send data at same time to arduino via serial nodes?

[edgaromarreynatorres]

does node red need wifi to show the dashboard?

[Ngigi]

Hi bro this is nice.
I am doing something similar but I am receiving data from my sensors using XBee. The data I retrieve from the Serial Node is hex. How can I convert to float to plot these graphs please?

[mustafaaljumaili]

For same setup, can you connect it to raspberry pi then measurements can be displayed wireless by phone??