功能：
0.本项目采用STC89C52作为单片机系统的控制MCU
1.通过蓝牙发送指令控制LED灯
2.通过手机APP可以控制8路LED灯的亮灭，可以全亮全灭。
3.通过手机APP可以控制8路LED灯的亮度。每个灯的亮度有3档。具体控制指令如下
a)发送Ox，开启指定LED灯
b)发送Sx，关闭指定LED灯
c)发送Ax，开启指定LED灯，灯光等级1
d)发送Bx，开启指定LED灯，灯光等级2
e)发送Cx，开启指定LED灯，灯光等级3
x取1~8选择控制相应LED,取T控制所有LED灯
4.采用DC002作为电源接口可直接输入5V给整个系统供电

原理图：

PCB ：

主程序：

#include 
#include 
#include 
#include  //Keil library
#include "delay.h"
//	操作方法
// 蓝牙发送字符 CX或cX 表示关闭x位灯， x取值1-8
// 蓝牙发送字符 OX或oX 表示关闭x位灯， x取值1-8
sbit LED1 = P2^0; // 初始化led灯对应引脚
sbit LED2 = P2^1;
sbit LED3 = P2^2;
sbit LED4 = P2^3;
sbit LED5 = P2^4;
sbit LED6 = P2^5;
sbit LED7 = P2^6;
sbit LED8 = P2^7;#define INIT 0xFF // 常量定义
#define OPEN 0x02
#define CLOSE 0x03
#define DAGN01 0x04
#define DAGN02 0x05
#define DAGN03 0x06unsigned char Commd_Flag = INIT; // 命令接受标识unsigned char pwmLed01 = 3; // pwm调整参数
unsigned char pwmLed02 = 3; // pwm调整参数
unsigned char pwmLed03 = 3; // pwm调整参数
unsigned char pwmLed04 = 3; // pwm调整参数
unsigned char pwmLed05 = 3; // pwm调整参数
unsigned char pwmLed06 = 3; // pwm调整参数
unsigned char pwmLed07 = 3; // pwm调整参数
unsigned char pwmLed08 = 3; // pwm调整参数unsigned char countLed01 = 0; // pwm计数
unsigned char countLed02 = 0; // pwm计数
unsigned char countLed03 = 0; // pwm计数
unsigned char countLed04 = 0; // pwm计数
unsigned char countLed05 = 0; // pwm计数
unsigned char countLed06 = 0; // pwm计数
unsigned char countLed07 = 0; // pwm计数
unsigned char countLed08 = 0; // pwm计数void UART_Init(void);
void SendByte(unsigned char dat);
void SendStr(unsigned char *s, unsigned char length);void main(void)
{UART_Init();   // 蓝牙 串口 波特率9600LED1 = 0;LED2 = 0;LED3 = 0;LED4 = 0;LED5 = 0;LED6 = 0;LED7 = 0;LED8 = 0;DelayMs(200);LED1 = 1; // 关闭相应的灯 并恢复命令标志LED2 = 1;LED3 = 1;LED4 = 1;LED5 = 1;LED6 = 1;LED7 = 1;LED8 = 1;DelayMs(10); // 延时有助于稳定P2 = 0xFF;while (1) // 主循环{; // 蓝牙的接收处理 均在中断中处理 请查看串口中断countLed01++;if (countLed01 < pwmLed01) // 占空比调节{LED1 = 0;}						   // 打开else if (countLed01 <= 10) // 关闭时间段{LED1 = 1; // 关闭if (countLed01 == 10)countLed01 = 0; // 一个周期结束}countLed02++;if (countLed02 < pwmLed02) // 占空比调节{LED2 = 0;}						   // 打开else if (countLed02 <= 10) // 关闭时间段{LED2 = 2; // 关闭if (countLed02 == 10)countLed02 = 0; // 一个周期结束}countLed03++;if (countLed03 < pwmLed03) // 占空比调节{LED3 = 0;}						   // 打开else if (countLed03 <= 10) // 关闭时间段{LED3 = 1; // 关闭if (countLed03 == 10)countLed03 = 0; // 一个周期结束}countLed04++;if (countLed04 < pwmLed04) // 占空比调节{LED4 = 0;}						   // 打开else if (countLed04 <= 10) // 关闭时间段{LED4 = 1; // 关闭if (countLed04 == 10)countLed04 = 0; // 一个周期结束}countLed05++;if (countLed05 < pwmLed05) // 占空比调节{LED5 = 0;}						   // 打开else if (countLed05 <= 10) // 关闭时间段{LED5 = 1; // 关闭if (countLed05 == 10)countLed05 = 0; // 一个周期结束}countLed06++;if (countLed06 < pwmLed06) // 占空比调节{LED6 = 0;}						   // 打开else if (countLed06 <= 10) // 关闭时间段{LED6 = 1; // 关闭if (countLed06 == 10)countLed06 = 0; // 一个周期结束}countLed07++;if (countLed07 < pwmLed07) // 占空比调节{LED7 = 0;}						   // 打开else if (countLed07 <= 10) // 关闭时间段{LED7 = 1; // 关闭if (countLed07 == 10)countLed07 = 0; // 一个周期结束}countLed08++;if (countLed08 < pwmLed08) // 占空比调节{LED8 = 0;}						   // 打开else if (countLed08 <= 10) // 关闭时间段{LED8 = 1; // 关闭if (countLed08 == 10)countLed08 = 0; // 一个周期结束}}
}void UART_Init(void)
{SCON = 0x50;  // SCON: 模式 1, 8-bit UART, 使能接收TMOD |= 0x20; // TMOD: timer 1, mode 2, 8-bit 重装TH1 = 0xFD;	  // TH1:  重装值 9600 波特率 晶振 11.0592MHzTL1 = TH1;TR1 = 1; // TR1:  timer 1 打开EA = 1;	 // 打开总中断ES = 1;	 // 打开串口中断
}void UART_SER(void) interrupt 4 // 串行中断服务程序
{unsigned char R_buf;if (RI) // 判断是接收中断产生{RI = 0; // 标志位清零R_buf = SBUF;if ((R_buf == 'O') || (R_buf == 'o')){Commd_Flag = OPEN; // 接收到打开灯标志}else if ((R_buf == 'S') || (R_buf == 's')){Commd_Flag = CLOSE; // 接收到 关闭灯标志}else if ((R_buf == 'A') || (R_buf == 'a')){Commd_Flag = DAGN01; // 接收到 等级1标志}else if ((R_buf == 'B') || (R_buf == 'b')){Commd_Flag = DAGN02; // 接收到 等级2标志}else if ((R_buf == 'C') || (R_buf == 'c')){Commd_Flag = DAGN03; // 接收到 等级3标志}else if ((R_buf != '1') && (R_buf != '2') && (R_buf != '3') && (R_buf != '4') && (R_buf != '5') && (R_buf != '6') && (R_buf != '7') && (R_buf != '8') && (R_buf != 'T')){Commd_Flag = INIT; // 否则 初始化接受标志}if ((Commd_Flag == OPEN) || (Commd_Flag == DAGN01)) // 根据命令值进行打开相应的灯{switch (R_buf){case '1':pwmLed01 = 3;Commd_Flag = INIT;break; // 打开相应的灯 并恢复命令标志case '2':pwmLed02 = 3;Commd_Flag = INIT;break;case '3':pwmLed03 = 3;Commd_Flag = INIT;break;case '4':pwmLed04 = 3;Commd_Flag = INIT;break;case '5':pwmLed05 = 3;Commd_Flag = INIT;break;case '6':pwmLed06 = 3;Commd_Flag = INIT;break;case '7':pwmLed07 = 3;Commd_Flag = INIT;break;case '8':pwmLed08 = 3;Commd_Flag = INIT;break;case 'T':pwmLed01 = 3;pwmLed02 = 3;pwmLed03 = 3;pwmLed04 = 3;pwmLed05 = 3;pwmLed06 = 3;pwmLed07 = 3;pwmLed08 = 3;Commd_Flag = INIT;break;default:break; // 此处错误判断 不可恢复命令标准}}else if (Commd_Flag == CLOSE) // 根据命令值进行关闭相应的灯{switch (R_buf){case '1':pwmLed01 = 1;Commd_Flag = INIT;break; // 打开相应的灯 并恢复命令标志case '2':pwmLed02 = 1;Commd_Flag = INIT;break;case '3':pwmLed03 = 1;Commd_Flag = INIT;break;case '4':pwmLed04 = 1;Commd_Flag = INIT;break;case '5':pwmLed05 = 1;Commd_Flag = INIT;break;case '6':pwmLed06 = 1;Commd_Flag = INIT;break;case '7':pwmLed07 = 1;Commd_Flag = INIT;break;case '8':pwmLed08 = 1;Commd_Flag = INIT;break;case 'T':pwmLed01 = 1;pwmLed02 = 1;pwmLed03 = 1;pwmLed04 = 1;pwmLed05 = 1;pwmLed06 = 1;pwmLed07 = 1;pwmLed08 = 1;Commd_Flag = INIT;break;default:break; // 此处错误判断 不可恢复命令标准}}else if (Commd_Flag == DAGN02) // 根据命令值进行关闭相应的灯{switch (R_buf){case '1':pwmLed01 = 6;Commd_Flag = INIT;break; // 打开相应的灯 并恢复命令标志case '2':pwmLed02 = 6;Commd_Flag = INIT;break;case '3':pwmLed03 = 6;Commd_Flag = INIT;break;case '4':pwmLed04 = 6;Commd_Flag = INIT;break;case '5':pwmLed05 = 6;Commd_Flag = INIT;break;case '6':pwmLed06 = 6;Commd_Flag = INIT;break;case '7':pwmLed07 = 6;Commd_Flag = INIT;break;case '8':pwmLed08 = 6;Commd_Flag = INIT;break;case 'T':pwmLed01 = 6;pwmLed02 = 6;pwmLed03 = 6;pwmLed04 = 6;pwmLed05 = 6;pwmLed06 = 6;pwmLed07 = 6;pwmLed08 = 6;Commd_Flag = INIT;break;default:break; // 此处错误判断 不可恢复命令标准}}else if (Commd_Flag == DAGN03) // 根据命令值进行关闭相应的灯{switch (R_buf){case '1':pwmLed01 = 9;Commd_Flag = INIT;break; // 打开相应的灯 并恢复命令标志case '2':pwmLed02 = 9;Commd_Flag = INIT;break;case '3':pwmLed03 = 9;Commd_Flag = INIT;break;case '4':pwmLed04 = 9;Commd_Flag = INIT;break;case '5':pwmLed05 = 9;Commd_Flag = INIT;break;case '6':pwmLed06 = 9;Commd_Flag = INIT;break;case '7':pwmLed07 = 9;Commd_Flag = INIT;break;case '8':pwmLed08 = 9;Commd_Flag = INIT;break;case 'T':pwmLed01 = 9;pwmLed02 = 9;pwmLed03 = 9;pwmLed04 = 9;pwmLed05 = 9;pwmLed06 = 9;pwmLed07 = 9;pwmLed08 = 9;Commd_Flag = INIT;break;default:break; // 此处错误判断 不可恢复命令标准}}SBUF = R_buf; // 返回接收到的数据}if (TI) // 如果是发送标志位，清零TI = 0;
}

仿真演示视频：
https://www.bilibili.com/video/BV1JW4y1s7on/

实物演示视频：
https://www.bilibili.com/video/BV1rg411p7Ut/