(Solved Homework): How would I go about wiring this Robotdyn LCD 16×2 display to an Arduino uno and the given PH probe given below?

How would I go about wiring this Robotdyn LCD 16×2 display to an Arduino uno and the given PH probe given below?

LEFT RIGHT SELECT LCD 16x2 keypad Shield GND

LEFT RIGHT SELECT LCD 16×2 keypad Shield GND

Expert Answer

 This is the sample code to make ph meter work:

Red: 5V
Black: GND
Blue: Analog in pin (A2 in our case)

const int analogInPin = A2; // Analog input pin that the sensor is attached to

const int analogOutPin = 9; // Analog output pin that the LED is attached to

int sensorValue = 0; // value read from the pot

int outputValue = 0; // value output to the PWM (analog out)

void setup() {

// initialize serial communications at 9600 bps:



void loop() {

// read the analog in value:

sensorValue = analogRead(analogInPin);

// map it to the range of the analog out:

outputValue = map(sensorValue, 0, 1023, 0, 14);

// change the analog out value:

analogWrite(analogOutPin, outputValue);

// print the results to the serial monitor:

Serial.print(“sensor = ” );


Serial.print(“t output = “);

Serial.println(analogRead(2)* 14.0 / 1024, 1);

// wait 10 milliseconds before the next loop

// for the analog-to-digital converter to settle

// after the last reading:



For LCD, all ypu ned is to place the module on the top of Uno board. The pins are all alligned and will be placed properly.As said use the “liquidcristal.h” library to make the LCD work.

Example code

// include the library code:
#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
// set up the LCD’s number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print(“Chegg Rocks!”);

void loop() {
// Turn off the display:
// Turn on the display:

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