Here’s a sketch I wrote 2 years ago to control motor speeds based on various IR codes. You’ll need to put in the codes for whatever your remote transmits.
You’re welcome to use it, YMMV.
/*
* IRremote: IRrecvDemo - demonstrates receiving IR codes with IRrecv
* An IR detector/demodulator must be connected to the input RECV_PIN.
* Version 0.1 July, 2009
* Copyright 2009 Ken Shirriff
* http://arcfn.com
*/
/* well now it controls 2x motors on MotoMama (298) board
Jim Brown June 2012
jim.brownza at gmail dot com
******* PWM on pin3 seems disabled when using IR?
Uses a Philips remote (with RC5 coding)
under rc5, the keys have two toggled values
speed:
vol down: 411 or c11 hex; 1041 or 3089 dec
vol up: 410 or c10 hex; 1040 or 3088 dec
stop:
standby: 3148 or 1100
direction:
cd (fwd): 3391 or 1343
tuner (rev): 3199 or 1141
*/
#include <IRremote.h>
int RECV_PIN = 11;
//get the motors sorted
int motorA_speed_pin = 5; // seems PWM not work on 3 with IR library This is the MM EnA
int motorA_speed = 0; //always start at rest
//int motorA_speed_temp; //for dir change
int motorA_dir_pin1 = 2; // MM ln1
int motorA_dir_pin2 = 4; // MM ln2
int motorB_dir_pin1 = 7; // MM ln3
int motorB_dir_pin2 = 8; // MM ln4
int motorB_speed_pin = 6; // seems PWM not work on 3 with IR library This is the MM EnB
int motorB_speed = 0; //always start at rest
//int motorB_speed_temp; //for dir change
int motor_speed_step = 10; // and change in pwm steps of 10 same for both motors
float turn_diff_factor = 0.8;
int turn_time = 1000; //milliseconds
IRrecv irrecv(RECV_PIN);
decode_results results;
void setup()
{
Serial.begin(9600);
irrecv.enableIRIn(); // Start the receiver
pinMode(motorA_speed_pin, OUTPUT);
analogWrite(motorA_speed_pin, motorA_speed);
pinMode(motorA_dir_pin1, OUTPUT);
pinMode(motorA_dir_pin2, OUTPUT);
digitalWrite(motorA_dir_pin1, 1); //start forward
digitalWrite(motorA_dir_pin2, 0); //start forward
pinMode(motorB_speed_pin, OUTPUT);
analogWrite(motorB_speed_pin, motorB_speed);
pinMode(motorB_dir_pin1, OUTPUT);
pinMode(motorB_dir_pin2, OUTPUT);
digitalWrite(motorB_dir_pin1, 1); //start forward
digitalWrite(motorB_dir_pin2, 0); //start forward
}
void loop() {
if (irrecv.decode(&results)) {
Serial.println(results.value, DEC);
irrecv.resume(); // Receive the next value
//now act on various key presses
// *********************** STOP
if (results.value == 3148 || results.value == 1100) {
motorA_speed = 0;
motorB_speed = 0;
Serial.print("Stopping ");
Serial.print(motorA_speed);
Serial.print("\t");
Serial.println(motorB_speed);
analogWrite(motorA_speed_pin, motorA_speed);
analogWrite(motorB_speed_pin, motorB_speed);
} //end of stopping
// *********************** END OF STOP
// *********************** SET STRAIGHT LINE SPEED
//straight line speed.... both motors the same
// only time they differ is during a turn and it restores the changed one
// after a turn anyway
//
if (results.value == 1041 || results.value == 3089) {
//slowing
//slow motorA
motorA_speed = motorA_speed - motor_speed_step;
if (motorA_speed < 0) {
motorA_speed = 0;
}
//slow motorB
motorB_speed = motorB_speed - motor_speed_step;
if (motorB_speed < 0) {
motorB_speed = 0;
}
Serial.print("Going down to ");
Serial.print(motorA_speed);
Serial.print("\t");
Serial.println(motorB_speed);
analogWrite(motorA_speed_pin, motorA_speed);
analogWrite(motorB_speed_pin, motorB_speed);
} //end of slowing
//
if (results.value == 1040 || results.value == 3088) {
//speeding
//speed motorA
motorA_speed = motorA_speed + motor_speed_step;
if (motorA_speed > 255) {
motorA_speed = 255;
}
//speed motor2
motorB_speed = motorB_speed + motor_speed_step;
if (motorB_speed > 255) {
motorB_speed = 255;
}
Serial.print("Going up to ");
Serial.print(motorA_speed);
Serial.print("\t");
Serial.println(motorB_speed);
analogWrite(motorA_speed_pin, motorA_speed);
analogWrite(motorB_speed_pin, motorB_speed);
} //end of speeding
// *********************** END OF SET STRAIGHT LINE SPEED
// *************************** SET DIRECTION
// for the hell of it, gna stop and continue at same after setting speed
if (results.value == 3391 || results.value == 1343) {
// forward
Serial.print("Setting direction Forward");
//stop
analogWrite(motorA_speed_pin, 0);
analogWrite(motorB_speed_pin, 0);
// set dir forward
digitalWrite(motorA_dir_pin1, 1);
digitalWrite(motorA_dir_pin2, 0);
digitalWrite(motorB_dir_pin1, 1);
digitalWrite(motorB_dir_pin2, 0);
// back to speed
analogWrite(motorA_speed_pin, motorA_speed);
analogWrite(motorB_speed_pin, motorB_speed);
} // end of forward
if (results.value == 3199 || results.value == 1141) {
// reverese
Serial.print("Setting direction Reverse");
//stop
analogWrite(motorA_speed_pin, 0);
analogWrite(motorB_speed_pin, 0);
// set dir forward
digitalWrite(motorA_dir_pin1, 0);
digitalWrite(motorA_dir_pin2, 1);
digitalWrite(motorB_dir_pin1, 0);
digitalWrite(motorB_dir_pin2, 1);
// back to speed
analogWrite(motorA_speed_pin, motorA_speed);
analogWrite(motorB_speed_pin, motorB_speed);
} // end of reverse
// *********************** END OF SET DIRECTION
// ************************* TURNING
if (results.value == 3169 || results.value == 1121) {
// turn left... slow motorA
Serial.println("Turning LEFT");
analogWrite(motorA_speed_pin, turn_diff_factor * motorA_speed);
delay(turn_time);
analogWrite(motorA_speed_pin, motorA_speed);
} //end of left
if (results.value == 3168 || results.value == 1120) {
// turn right... slow motorB
Serial.println("Turning RIGHT");
analogWrite(motorB_speed_pin, turn_diff_factor * motorB_speed);
delay(turn_time);
analogWrite(motorB_speed_pin, motorB_speed);
} //end of right
} //end of ir
} //end of loop
