Today I walk through how to hook up an industrial pressure transducer sensor and interface it with an Arduino micro-controller. I take the incoming analog voltage value, convert it and display it to the serial monitor as well as onto an LCD screen. Code below. If you have any questions please comment below or e-mail me below.
Stay tuned for more videos!
Tyler,
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Code Start */
/* This example demonstrates how to take a standard 3-wire pressure transducer
* and read the analog signal, then convert the signal to a readable output and
* display it onto an LCD screen.
*
* Contact Tyler at tylerovens@me.com if you have any questions
*/
#include "Wire.h" //allows communication over i2c devices
#include "LiquidCrystal_I2C.h" //allows interfacing with LCD screens
const int pressureInput = A0; //select the analog input pin for the pressure transducer
const int pressureZero = 102.4; //analog reading of pressure transducer at 0psi
const int pressureMax = 921.6; //analog reading of pressure transducer at 100psi
const int pressuretransducermaxPSI = 100; //psi value of transducer being used
const int baudRate = 9600; //constant integer to set the baud rate for serial monitor
const int sensorreadDelay = 250; //constant integer to set the sensor read delay in milliseconds
float pressureValue = 0; //variable to store the value coming from the pressure transducer
LiquidCrystal_I2C lcd(0x3f, 20, 4); //sets the LCD I2C communication address; format(address, columns, rows)
void setup() //setup routine, runs once when system turned on or reset
{
Serial.begin(baudRate); //initializes serial communication at set baud rate bits per second
lcd.begin(); //initializes the LCD screen
}
void loop() //loop routine runs over and over again forever
{
pressureValue = analogRead(pressureInput); //reads value from input pin and assigns to variable
pressureValue = ((pressureValue-pressureZero)*pressuretransducermaxPSI)/(pressureMax-pressureZero); //conversion equation to convert analog reading to psi
Serial.print(pressureValue, 1); //prints value from previous line to serial
Serial.println("psi"); //prints label to serial
lcd.setCursor(0,0); //sets cursor to column 0, row 0
lcd.print("Pressure:"); //prints label
lcd.print(pressureValue, 1); //prints pressure value to lcd screen, 1 digit on float
lcd.print("psi"); //prints label after value
lcd.print(" "); //to clear the display after large values or negatives
delay(sensorreadDelay); //delay in milliseconds between read values
}
*/ Code End