Keyestudio 4WD Bluetooth Multi-functional Car - Page 123

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Sample Code：
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#include <LiquidCrystal_I2C.h> //including the libraries of I2C-LCD1602 liquid crystal
#include <Wire.h> //including the libraries of I2C
unsigned char Bluetooth_val; //defining variable val
LiquidCrystal_I2C lcd(0x27,16,2); //defining liquid crystal
#define Lpwm_pin 5 //adjusting speed
#define Rpwm_pin 10 //adjusting speed //
int pinLB=2; // defining pin2 left rear
int pinLF=4; // defining pin4 left front
int pinRB=7; // defining pin7 right rear
int pinRF=8; // defining pin8 right front
unsigned char Lpwm_val = 255;
unsigned char Rpwm_val = 255;
int Car_state=0;
void M_Control_IO_config(void)
{
pinMode(pinLB,OUTPUT); // pin 2
pinMode(pinLF,OUTPUT); // pin 4
pinMode(pinRB,OUTPUT); // pin 7
pinMode(pinRF,OUTPUT); // pin 8
pinMode(Lpwm_pin,OUTPUT); // pin 11 (PWM)
pinMode(Rpwm_pin,OUTPUT); // pin 10 (PWM)
}
void Set_Speed(unsigned char Left,unsigned char Right)