Hi.
I am currently trying to make the arduino control a lot of things on my boat. the first thing i wanted to do was
turning things on and off via a 4x4 keypad. Press A once for turning relay 1 on, then turn it off by pressing A again.
How can i do that?
The code so far, i would like not to use a second button for turning off.
#include <Keypad.h>
int relay1Pin = 11; // relay
int relay2Pin = 12;
const byte ROWS = 4; //four rows
const byte COLS = 4; //three columns
char hexaKeys[ROWS][COLS] = {
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};
byte rowPins[ROWS] = {40, 41, 42, 43}; //connect to the row pinouts of the kpd
byte colPins[COLS] = {44, 45, 46, 47}; //connect to the column pinouts of the kpd
Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);
void setup(){
Serial.begin(9600);
pinMode(relay1Pin, OUTPUT); // relay
pinMode(relay2Pin, OUTPUT);
}
void loop(){
char customKey = customKeypad.getKey();
if (customKey){
Serial.println(customKey);
}
if (customKey == 'A') // relay 1 on
{
digitalWrite(relay1Pin,HIGH);
}
if (customKey == 'B') // relay 1 on
{
digitalWrite(relay1Pin,LOW);
}
}