Sensor MPXV7007DP

[yasbch]

Hi, please I need to put together a code ARDUINO that will work with a MPXV7007DP pressure transducer that displays the pressure. I tried this circuit Arduino 5V to sensor pin 2.
Arduino GND to sensor pin 3.
Arduino analog input (for example A0) to sensor pin 4.

[amitf]

And where is your code?
Do you want to display pressure on serial monitor or a separate lcd.

[PaulRB]

Begin with the "Read Analog Voltage" sketch from the examples menu in the IDE.

Read Analog Voltage | Arduino Documentation

Test the sketch and how the output changes when the pressure on the sensor changes. Verify the voltage printed to the serial monitor matches what you measure with your multimeter.

Next step is to use that voltage to calculate the pressure. Here is the important part of the data sheet for that calculation:

Can you change that equation to give P for the values Vout and Vs? (Do not be concerned about the pressure error and temperature factors for the moment.)

[TomGeorge]

Hi, @yasbch
Welcome to the forum.

Can you please post some images of your project so we can see you component layout?

To add code please click this link;

How to get the best out of this forum

See also FAQ - Arduino Forum for general rules on forum behaviour and etiquette. Hello, Welcome to the Arduino Forum. This guide explains how to get the best out of this forum. Please read and follow the instructions below. Being new here you might think this is having rules for the sake of rules, but that is not the case. If you don’t follow the guidelines all that happens is there is a long exchange of posts while we try to get you to tell us what we need in order to help you, which is fru…

Thanks.. Tom...

[Wawa]

Ratiometric sensors like that only output 0.5volt to 4.5volt if the supply is exactly 5.000volt, which it rarely is. Therefore it's safer to say that they output 10% to 90% of their supply.

The scale of an MPXV7007 is 7kPa. This scetch converts 10-90% of a 10-bit A/D to PSI. "Scale" can be changed to a different unit if needed. Try this basic scetch.
Leo..

const int offset = 102; // zero pressure adjust
const int fullScale = 922; // max pressure adjust
// float scale = 7.0; // in kPa
float scale = 1.01526; // 7kPa in PSI
float pressure; // final pressure

void setup() {
  Serial.begin(9600);
}

void loop() {
  pressure = (analogRead(A0) - offset) * scale / (fullScale - offset);
  Serial.print("Pressure: ");
  Serial.print(pressure, 3); // three decimal places
  Serial.println(" PSI");
  delay(1000); // human readable
}

[gregbowers]

Hello

Pls go through below simplified version of the code:

const int sensorPin = A0;

void setup() {
Serial.begin(9600); // Initialize serial communication
}

void loop() {
int sensorValue = analogRead(sensorPin); // Read analog value from the sensor
float pressure = (sensorValue / 1023.0) * 5.0; // Convert the sensor value to pressure in volts
Serial.print("Pressure: ");
Serial.print(pressure);
Serial.println(" V");
delay(1000); // Delay for 1 second
}

This code takes the pin A0 analog value, transforms it into a voltage value and displays the voltage values on a serial monitor. The serial monitor must be connected to the computer and the serial monitor must be opened (set to 9600 baud rate) to display the pressure readings .

Hope it will help you .

[Wawa]

OP asked for a pressure display, not for a voltmeter.

Your code ignores the 10% sensor offset.
Therefore it will display about 0.5volt with no pressure applied.
Leo..