Keypad and LCD part #1 How to interface 4x4 keypad with arduino UNO in...

Arduino code:
#include <Keypad.h>
const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns
char keys[ROWS][COLS] = {
  {'7','8','9','/'},
  {'4','5','6','*'},
  {'1','2','3','-'},
  {'c','0','=','+'}
};
byte rowPins[ROWS] = {2, 3, 4, 5}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {6, 7, 8, 9}; //connect to the column pinouts of the keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
void setup(){
   Serial.begin(9600);
}
void loop()
{
  char key = keypad.getKey();
  if (key)
  {
    Serial.println(key);
  }
   if (key=='5')
   {
    Serial.println("hiii");
   }

}

Embedded systems basics:
Embedded systems step by step video guide
-using PROTEUS ISIS professional and Arduino IDE software

Click below link for interface Keypad with Arduino UNO
https://youtu.be/cnPb4pObkXc

Click below link for the gas sensor
https://youtu.be/ALm-okkKRPY

Click below link for PIR sensor
https://youtu.be/4gRo1ijpMmQ

Click below link for the temperature sensor
https://youtu.be/1GJC_6eF7Xg

Click below link for vibration sensor
https://youtu.be/jiJAhxa687s

Click below link for M shape led blinking
https://youtu.be/S46J4L4KOu4

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https://digiuniverselife.blogspot.in

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Basics of embedded systems -Digital Universe
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