nRF24L01 and 4 Relays

Projects General Guidance
4

Alright, I had a little help and we came up with this code.
I know its not perfect because it should be using an array but it does the Job. Still need some modifications though.

//transmitter

#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

RF24 radio(9, 10);

const byte rxAddr[6] = "00001";

void setup()
{
  

  Serial.begin(9600);
  radio.begin();
  radio.setRetries(15, 15);
  radio.openWritingPipe(rxAddr);
  radio.stopListening();

}

void loop()
{
  while( Serial.available()>0){
    char cmd = Serial.read();
    if (cmd > 48 && cmd < 57){
      radio.write(&cmd, 1);  
    }   
  }  
}

//receiver

#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>

#define CH1 2  
#define CH2 3 
#define CH3 4 
#define CH4 5


RF24 radio(9, 10);
char cmd;
const byte rxAddr[6] = "00001";

void onPin(int8_t pin) {
  digitalWrite(pin, LOW);
  delay(1000);
  digitalWrite(pin, HIGH);
}

void offPin(int8_t pin) {
  digitalWrite(pin, HIGH);  

}

void setup()
{
  pinMode(CH1, OUTPUT);
  pinMode(CH2, OUTPUT);
  pinMode(CH3, OUTPUT);
  pinMode(CH4, OUTPUT);
  digitalWrite(CH1,HIGH);
  digitalWrite(CH2,HIGH);
  digitalWrite(CH3,HIGH);
  digitalWrite(CH4,HIGH);
  
  radio.begin();
  radio.openReadingPipe(0, rxAddr);
  radio.startListening();
}

void loop()
{
  if (radio.available())
  {
    radio.read(&cmd, 1);

    switch(cmd){ 
      case '1':  onPin(CH1); break;
      case '2':  onPin(CH2); break;
      case '3':  onPin(CH3); break;
      case '4':  onPin(CH4); break;
      case '5': offPin(CH1); break;
      case '6': offPin(CH2); break;
      case '7': offPin(CH3); break;
      case '8': offPin(CH4); break;
    }
    
  }
}

Basically just 1-4 to turn on relay 1-4 and 5-8 to turn relay 1-4 off again.
...not quite what I wanted but itll do for now.

Thanks for your input, I might be back soon..:slight_smile: