#include <IRremote.hpp>
#define IR_RECEIVE_PIN 0

void setup(){
  Serial.begin(9600);
  IrReceiver.begin(IR_RECEIVE_PIN);
}

void loop(){
   if (IrReceiver.decode()) {
      IrReceiver.resume(); // Enable receiving of the next value
      //Serial.println(IrReceiver.decodedIRData.decodedRawData, HEX);
      Serial.println(IrReceiver.decodedIRData.command);
  }
}

#include <IRremote.hpp>

#define IR_RECEIVE_PIN 0
#define IR_BUTTON_PLUS 21
#define IR_BUTTON_MINUS 7
#define IR_BUTTON_CH_PLUS 71
#define IR_BUTTON_CH_MINUS 69
#define IR_BUTTON_PLAY_PAUSE 67

#define SPEED_1      5 
#define DIR_1        4
 
#define SPEED_2      6
#define DIR_2        7

void setup(){
  Serial.begin(9600);
  IrReceiver.begin(IR_RECEIVE_PIN);

  for (int i = 4; i < 8; i++) {     
    pinMode(i, OUTPUT);
  }
}

void loop(){
   if (IrReceiver.decode()) {
      IrReceiver.resume(); // Enable receiving of the next value
      int command = IrReceiver.decodedIRData.command;
      
      switch (command) {
        case IR_BUTTON_PLUS: {
          digitalWrite(DIR_1, LOW); // set direction
          analogWrite(SPEED_1, 255); // set speed

          digitalWrite(DIR_2, LOW); // set direction
          analogWrite(SPEED_2, 255); // set speed

          break;
        }
        case IR_BUTTON_MINUS: {
          digitalWrite(DIR_1, HIGH); // set direction
          analogWrite(SPEED_1, 255); // set speed

          digitalWrite(DIR_2, HIGH); // set direction
          analogWrite(SPEED_2, 255); // set speed

          break;
        }
        case IR_BUTTON_CH_PLUS: { // stop mototrs
          digitalWrite(DIR_1, HIGH); // set direction
          analogWrite(SPEED_1, 255); // set speed

          digitalWrite(DIR_2, LOW); // set direction
          analogWrite(SPEED_2, 255); // set speed

          break;
        }
        case IR_BUTTON_CH_MINUS: { 
          digitalWrite(DIR_1, LOW); // set direction
          analogWrite(SPEED_1, 255); // set speed

          digitalWrite(DIR_2, HIGH); // set direction
          analogWrite(SPEED_2, 255); // set speed
          
          break;
        }
        case IR_BUTTON_PLAY_PAUSE: { // stop mototrs
          analogWrite(SPEED_1, 0); 
          analogWrite(SPEED_2, 0);  
          break;
        }
      }
  }
}