Note: ALL OSOYOO Products for Arduino are Third Party Board which is fully compatible with Arduino

Overview

In this lesson, we will show how to use the IR control and receiver to control a motor. We use the OSOYOO basic board as the MCU board here, and the Osoyoo Model X motor driver is based on the L298N chip, if you plan on working with robots or just building things that move you’ll eventually need to learn how to control a motor. The Osoyoo Model X motor driver module is a simple way to achieve that.

Part List

Software Preparation

IDE(version 1.6.8 or later)

Library: IRremote.h

Connection

  1. Connect battery box, motor to OSOYOO MODEL X motor dirver module according below connection diagram:

2. Connect the OSOYOO basic board and OSOYOO MODEL X motor driver module as below:

OSOYOO Basic Board OSOYOO MODEL X motor driver module
D2 IN1
D4 IN2
D5 ENA
D6 ENB

3. Connect the S pin in IR receiver to D3 pin in board, GND to GND, VCC to 5V, as the following photo :

Code Program

After above operations are completed, connect the board to your computer using the USB cable. The green power LED (labelled PWR) should go on.Open the IDE and choose corresponding board type and port type for you project. Then load up the following sketch onto your your board.

#include
#define IR_RECEIVE_PIN 3 //IR receiver Signal pin connect to Arduino pin D3
#define IN1 2 //K1、K2 motor direction
#define IN2 4 //K1、K2 motor direction
#define ENA 5 // Needs to be a PWM pin to be able to control motor speed ENA
#define ENB 6 // Needs to be a PWM pin to be able to control motor speed ENA

#define IR_ADVANCE 24 //code from IR controller “▲” button
#define IR_BACK 82 //code from IR controller “▼” button
enum DN
{
GO_ADVANCE, //go ahead
GO_BACK,//go back
DEF
}Drive_Num=DEF;

bool stopFlag = true;//set stop flag
bool JogFlag = false;
uint16_t JogTimeCnt = 0;
uint32_t JogTime=0;
/*motor control*/
void go_back(int t) //motor rotate clockwise –>robot go ahead
{
digitalWrite(IN1, LOW);
digitalWrite(IN2, HIGH);
delay(t);
}
void go_ahead(int t) //motor rotate counterclockwise –>robot go back
{
digitalWrite(IN1, HIGH);
digitalWrite(IN2, LOW);
delay(t);
}
void go_stop() //motor brake –>robot stop
{
digitalWrite(IN1, LOW);
digitalWrite(IN2, LOW);
}

/*set motor speed */
void set_motorspeed(int lspeed,int rspeed) //change motor speed
{
analogWrite(ENA,lspeed);//lspeed:0-255
analogWrite(ENB,rspeed);//rspeed:0-255
}
/**************detect IR code***************/
void do_IR_Tick()
{
if(IrReceiver.decode())
{
uint16_t command = IrReceiver.decodedIRData.command;
if(command==IR_ADVANCE)
{
Drive_Num=GO_ADVANCE;
}
else if(command==IR_BACK)
{
Drive_Num=GO_BACK;
}
command = 0;
IrReceiver.resume();
}
}
/**************car control**************/
void do_Drive_Tick()
{
switch (Drive_Num)
{
case GO_ADVANCE:
set_motorspeed(255,255);go_ahead(20);JogFlag = true;JogTimeCnt = 3;JogTime=millis();break;//if GO_ADVANCE code is detected, then go advance
case GO_BACK:
set_motorspeed(255,255);go_back(20);JogFlag = true;JogTimeCnt = 1;JogTime=millis();break;//if GO_BACK code is detected, then backward
default:break;
}
Drive_Num=DEF;
//keep current moving mode for 100 millis seconds
if(millis()-JogTime>=100)
{
JogTime=millis();
if(JogFlag == true)
{
stopFlag = false;
if(JogTimeCnt <= 0)
{
JogFlag = false; stopFlag = true;
}
JogTimeCnt–;
}
if(stopFlag == true)
{
JogTimeCnt=0;
go_stop();
}
}
}
void setup() {
/******L298N******/
pinMode(IN1, OUTPUT);
pinMode(IN2, OUTPUT);
pinMode(ENA, OUTPUT);
pinMode(ENB, OUTPUT);

IrReceiver.begin(IR_RECEIVE_PIN, DISABLE_LED_FEEDBACK);
}

void loop() {
do_IR_Tick();
do_Drive_Tick();
}



Running Result


A few seconds after the upload finishes, pull out the USB cable, put the 18650 batteries into the battery box, install wheel on the motor, then turn on the battery case.