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嵌入式-手把手教你制作Arduino无线通信系统（ZIGBEE模块、DHT11、光敏、WIFI模块）

前言

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更详细的讲解请移步Bilibili：EDAdong。

设计目标和方案

（1）基于Arduino的无线通信系统具备主机和分机模块，所有模块都以Arduino作为主控，两个模块之间通过ZigBee进行通信；

（2）分机可以实现对温度，湿度以及光照强度的检测，并上传至主机模块；

（3）主机模块实现显示，控制以及远程上传；

（4）主机具备WiFi通信模块，并上传至手机APP端，实现远程控制。

注意事项

WIFI功能属于附加功能，可加可不加，不影响功能实现

原理图及实物图

代码

主机代码

#include

#include //u8g2库

#include

/*定义部分引脚*/

#define led 13 //定义LED的驱动引脚

#define rxPin 9

#define txPin 8

SoftwareSerial mySerial(rxPin, txPin);

/*定义运行过程中的参量*/

int wendu; //全局变量温度

int shidu; //全局变量湿度

int light_strength; //全局变量光照强度

int led_status=0; //定义LED灯的工作状态

int wendu_status=0;

char test;

/*新建iic对象以及显示屏对象*/

U8G2_SSD1306_128X64_NONAME_F_SW_I2C u8g2(U8G2_R0,10,11,U8X8_PIN_NONE); //配置OLED函数

//U8X8_SSD1306_128X64_NONAME_SW_I2C u8x8(/* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE);

/************************存放oled汉字取模数据*********************************/

/*******取16X16汉字字模逐行式顺向高位在前阴码，逐行，逆向，16进制，C51格式******/

static const unsigned char PROGMEM str0[] =

{

0x00,0x00,0x00,0x00,0xBF,0x7F,0x08,0x08,0x08,0x08,0x08,0x04,0x08,0x04,0x3E,0x16,

0x08,0x25,0x88,0x44,0x48,0x44,0x08,0x04,0x38,0x04,0x07,0x04,0x02,0x04,0x00,0x04};/*"环",0*/

static const unsigned char PROGMEM str1[] =

{

0x04,0x01,0x04,0x02,0xC4,0x1F,0x84,0x08,0x1F,0x05,0xE4,0x7F,0x04,0x00,0xC4,0x1F,

0x44,0x10,0xC4,0x1F,0x44,0x10,0xDC,0x1F,0x87,0x04,0x82,0x44,0x40,0x44,0x30,0x78};/*"境",1*/

static const unsigned char PROGMEM str2[] =

{

0x00,0x00,0xC4,0x1F,0x48,0x10,0x48,0x10,0xC1,0x1F,0x42,0x10,0x42,0x10,0xC8,0x1F,

0x08,0x00,0xE4,0x3F,0x27,0x25,0x24,0x25,0x24,0x25,0x24,0x25,0xF4,0x7F,0x00,0x00};/*"温",2*/

static const unsigned char PROGMEM str3[] =

{

0x00,0x00,0xE4,0x1F,0x28,0x10,0x28,0x10,0xE1,0x1F,0x22,0x10,0x22,0x10,0xE8,0x1F,

0x88,0x04,0x84,0x04,0x97,0x24,0xA4,0x14,0xC4,0x0C,0x84,0x04,0xF4,0x7F,0x00,0x00};/*"湿",3*/

static const unsigned char PROGMEM str4[] =

{

0x80,0x00,0x84,0x10,0x88,0x10,0x90,0x08,0x90,0x04,0x80,0x00,0xFF,0x7F,0x20,0x02,

0x20,0x02,0x20,0x02,0x20,0x02,0x10,0x42,0x10,0x42,0x08,0x42,0x04,0x7C,0x03,0x00};/*"光",4*/

static const unsigned char PROGMEM str5[] =

{

0x00,0x00,0xBE,0x3F,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x29,0xBE,0x10,0x22,0x3F,

0x22,0x21,0x22,0x21,0x22,0x21,0x3E,0x3F,0x00,0x00,0x12,0x11,0x22,0x22,0x21,0x22};/*"照",5*/

static const unsigned char PROGMEM str6[] =

{

0x00,0x00,0x9F,0x3F,0x90,0x20,0x90,0x20,0x90,0x3F,0x1E,0x04,0x02,0x04,0xC2,0x7F,

0x42,0x44,0x5E,0x44,0xD0,0x7F,0x10,0x04,0x10,0x24,0x10,0x44,0xEA,0x7F,0x04,0x40};/*"强",6*/

static const unsigned char PROGMEM str7[] =

{

0x80,0x00,0x00,0x01,0xFC,0x7F,0x44,0x04,0x44,0x04,0xFC,0x3F,0x44,0x04,0x44,0x04,

0xC4,0x07,0x04,0x00,0xF4,0x0F,0x24,0x08,0x42,0x04,0x82,0x03,0x61,0x0C,0x1C,0x70};/*"度",7*/

static const unsigned char PROGMEM str8[] =

{

0x08,0x00,0x08,0x00,0xC8,0x7F,0x08,0x04,0x2A,0x04,0x1A,0x04,0x0A,0x04,0x09,0x04,

0x08,0x04,0x08,0x04,0x08,0x04,0x14,0x04,0x24,0x04,0x22,0x04,0x02,0x05,0x01,0x02};/*"灯",8*/

static const unsigned char PROGMEM str9[] =

{

0x00,0x04,0x80,0x04,0xBF,0x04,0x88,0x3F,0x88,0x04,0x48,0x04,0x3E,0x04,0xC8,0x7F,

0x08,0x0E,0x08,0x15,0x08,0x15,0xB8,0x24,0x87,0x24,0x42,0x44,0x00,0x04,0x00,0x04};/*"珠",9*/

static const unsigned char PROGMEM str10[] =

{

0x00,0x00,0xFE,0x3F,0x10,0x04,0x10,0x04,0x10,0x04,0x10,0x04,0x10,0x04,0xFF,0x7F,

0x10,0x04,0x10,0x04,0x10,0x04,0x10,0x04,0x08,0x04,0x08,0x04,0x04,0x04,0x02,0x04};/*"开",10*/

static const unsigned char PROGMEM str11[] =

{

0x08,0x08,0x10,0x08,0x10,0x04,0x00,0x00,0xFC,0x1F,0x80,0x00,0x80,0x00,0x80,0x00,

0xFF,0x7F,0x80,0x00,0x40,0x01,0x40,0x01,0x20,0x02,0x10,0x04,0x0C,0x18,0x03,0x60};/*"关",11*/

void oled_image()

{

u8g2.clearBuffer();//清屏

u8g2.drawXBMP(0, 0, 16, 16, str0);u8g2.drawXBMP(16, 0, 16, 16, str1);u8g2.drawXBMP(32, 0, 16, 16, str2);u8g2.drawXBMP(48, 0, 16, 16, str7);//环境温度

u8g2.drawXBMP(0, 16, 16, 16, str0);u8g2.drawXBMP(16, 16, 16, 16, str1);u8g2.drawXBMP(32, 16, 16, 16, str3);u8g2.drawXBMP(48, 16, 16, 16, str7);//环境湿度

u8g2.drawXBMP(0, 32, 16, 16, str4);u8g2.drawXBMP(16, 32, 16, 16, str5);u8g2.drawXBMP(32, 32, 16, 16, str6);u8g2.drawXBMP(48, 32, 16, 16, str7);//光照强度

u8g2.drawXBMP(0, 48, 16, 16, str8);u8g2.drawXBMP(16, 48, 16, 16, str9);u8g2.drawXBMP(32, 48, 16, 16, str10);u8g2.drawXBMP(48, 48, 16, 16, str11);//灯珠开关

u8g2.setFont(u8g2_font_ncenB14_tr);//字体08

u8g2.setCursor(64, 16);//设置显示位置

u8g2.print(":");//输出字符

u8g2.setCursor(64, 32);//设置显示位置

u8g2.print(":");//输出字符

u8g2.setCursor(64, 48);//设置显示位置

u8g2.print(":");//输出字符

u8g2.setCursor(64, 64);//设置显示位置

u8g2.print(":");//输出字符

u8g2.sendBuffer();//开显示

}

/****************OLED显示***************/

void oleddisplay()

{

u8g2.clearBuffer();//清屏

u8g2.drawXBMP(0, 0, 16, 16, str0);u8g2.drawXBMP(16, 0, 16, 16, str1);u8g2.drawXBMP(32, 0, 16, 16, str2);u8g2.drawXBMP(48, 0, 16, 16, str7);//环境温度

u8g2.drawXBMP(0, 16, 16, 16, str0);u8g2.drawXBMP(16, 16, 16, 16, str1);u8g2.drawXBMP(32, 16, 16, 16, str3);u8g2.drawXBMP(48, 16, 16, 16, str7);//环境湿度

u8g2.drawXBMP(0, 32, 16, 16, str4);u8g2.drawXBMP(16, 32, 16, 16, str5);u8g2.drawXBMP(32, 32, 16, 16, str6);u8g2.drawXBMP(48, 32, 16, 16, str7);//光照强度

u8g2.drawXBMP(0, 48, 16, 16, str8);u8g2.drawXBMP(16, 48, 16, 16, str9);u8g2.drawXBMP(32, 48, 16, 16, str10);u8g2.drawXBMP(48, 48, 16, 16, str11);//灯珠开关

u8g2.setFont(u8g2_font_ncenB14_tr);//字体08

u8g2.setCursor(64, 16);//设置显示位置

u8g2.print(":");//输出字符

u8g2.setCursor(64, 32);//设置显示位置

u8g2.print(":");//输出字符

u8g2.setCursor(64, 48);//设置显示位置

u8g2.print(":");//输出字符

u8g2.setCursor(64, 64);//设置显示位置

u8g2.print(":");//输出字符

u8g2.setFont(u8g2_font_ncenB14_tr);

u8g2.setCursor(92, 32);

u8g2.print(wendu);

u8g2.setCursor(92, 16);

u8g2.print(shidu);

u8g2.setCursor(92, 48);

u8g2.print(light_strength);

if(led_status==1)

u8g2.drawXBMP(92, 48, 16, 16, str10);

else

u8g2.drawXBMP(92, 48, 16, 16, str11);

u8g2.sendBuffer();//开显示

}

int start_flag;

u8 i;

u8 count;

u8 data_control[9]; //接收区存储数据

u8 recent_data[3];

void read_usart()

{

i = mySerial.available(); //返回目前串口接收区内的已经接受的数据量

if(i != 0)

{

//Serial.print("串口接收到的数据量为:");

//Serial.println(mySerial.available());

while(i--)

{

recent_data[2]=recent_data[1];

recent_data[1]=recent_data[0];

recent_data[0]=mySerial.read();

if(start_flag)

{

data_control[count]=recent_data[0]-48;

count++;

if(count>=9)

{

start_flag=0;

count=0;

//Serial.print("数据存储完毕!\r\n");

}

if(recent_data[0]==49&&recent_data[1]==55&&recent_data[2]==49)

{

start_flag=1;

//Serial.print("检测到起始位，准备开始接收数据\r\n");

}

else

{

}

/*初始化函数*/

void setup()

{

Serial.begin(9600); //初始化波特率115200

Serial.print("大家好");

mySerial.begin(9600);

mySerial.println("T");

/*初始化输出函数*/

pinMode(led, OUTPUT); //设置led引脚为输出模式以便控制led

/*初始化显示屏参数*/

u8g2.begin();

u8g2.enableUTF8Print();

oled_image();

}

int main_zhiling;

void loop()

{

read_usart();

wendu=data_control[0]*100+data_control[1]*10+data_control[2];

shidu=data_control[3]*100+data_control[4]*10+data_control[5];

light_strength=data_control[6]*100+data_control[7]*10+data_control[8];

Serial.print(0xAB);

Serial.print((u8)shidu/100);Serial.print((u8)shidu/10%10);Serial.print((u8)shidu%10);

Serial.print((u8)wendu/100);Serial.print((u8)wendu/10%10);Serial.print((u8)wendu%10);

Serial.print((u8)light_strength/100);Serial.print((u8)light_strength/10%10);Serial.print((u8)light_strength%10);

Serial.print(0xBA);

Serial.available();

main_zhiling=Serial.read();

if(main_zhiling=='T')led_status=1;

else if(main_zhiling=='F')led_status=0;

if(led_status)digitalWrite(led,1),mySerial.print("T");

else digitalWrite(led,0),mySerial.print("F");

oleddisplay();

delay(500);

}

从机代码：

#include "user_dht.h"

#include

#define analogPin A0 //定义光照强度检测的引脚

#define led 13

#define rxPin 9

#define txPin 8

DHT11 dht11(2); //调用dht11函数，引用2引脚，实际检测温度湿度

SoftwareSerial mySerial(rxPin, txPin);

int main_zhiling; //主机发送过来的指令

int light_val = 0; //定义变量来存储检测到的光照强度值

int led_status=0; //定义变量控制LED灯

extern float wendu; //全局变量温度，从dht文件采集数据传输至主文件

extern float shidu; //全局变量湿度，从dht文件采集数据传输至主文件

void setup()

{

Serial.begin(115200); //初始化波特率115200

pinMode(led, OUTPUT); //设置led引脚为输出模式以便控制led

digitalWrite(led,0); //连接失败LED熄灭

mySerial.begin(9600);

}

void loop()

{

mySerial.available();

main_zhiling=mySerial.read();

if(main_zhiling=='T')led_status=1;

else if(main_zhiling=='F')led_status=0;

dht11.Get_DHT11_Value(); //获取到DHT11的温湿度数据

light_val = analogRead(analogPin); //通过外部模拟输出得到光照强度值

light_val = 100-(int)((float)light_val/1024*100); //由于采集的是电压，从0-4095，于是要做一定的变换使其变成百分比值，另外光照强度最大时，采集到的电压最低，因此要做一定处理

mySerial.print(0xAB);

mySerial.print((u8)shidu/100);mySerial.print((u8)shidu/10%10);mySerial.print((u8)shidu%10);

mySerial.print((u8)wendu/100);mySerial.print((u8)wendu/10%10);mySerial.print((u8)wendu%10);

mySerial.print((u8)light_val/100);mySerial.print((u8)light_val/10%10);mySerial.print((u8)shidu%10);

mySerial.print(0xBA);

//Serial.print("Current humdity = "); Serial.println(shidu);Serial.print("\r\n"); //显示湿度的整数位； Serial.print('.');

//Serial.print("Current temperature = "); Serial.println(wendu);Serial.print("\r\n"); //显示温度的整数位； Serial.print('.');

// Serial.print("Current light = "); Serial.println(light_val);Serial.print("%\r\n"); //显示温度的整数位； Serial.print('.');

if(led_status)digitalWrite(led,1);

else digitalWrite(led,0);

delay(1000);

}

wifi模块代码：

#include "ALIMQTT.C"

#include

//我们测试需要用到的串口，ESP32一共有3个串口，串口0应该是用于程序烧写和打印输出调试用的，所以我们只用1和2

HardwareSerial MySerial_stm32(1);

ALIMQTT mqtt; //定义mqtt的一些任务函数

#define led 2 //定义LED的驱动引脚

int ground_duty,light_duty,wendu_data;//土壤占空比，光照占空比

int hextoint(int i)

{

if(i==48)return 0;

else if(i==49)return 1;

else if(i==50)return 2;

else if(i==51)return 3;

else if(i==52)return 4;

else if(i==53)return 5;

else if(i==54)return 6;

else if(i==55)return 7;

else if(i==56)return 8;

else if(i==57)return 9;

else if(i==65)return 10;

else if(i==66)return 11;

else if(i==67)return 12;

else if(i==68)return 13;

else if(i==69)return 14;

else if(i==70)return 15;

}

//MQTT协议函数

void callback(char *topic, byte *payload, unsigned int length)

{

payload[length]='\0';//payload是接收到的JSON格式数据，length是接收数据的字节数。

StaticJsonDocument<4096>doc;DeserializationError error = deserializeJson(doc, payload);//反序列化JSON数据

if(!error){mqttCommand(doc.as());}

}

void itemCommand(JsonVariant params)

{

Serial.println(params["COMMAND"].as());

mqtt.add("COMMAND",params["COMMAND"].as().c_str());mqtt.send();

}

void mqttCommand(JsonVariant params)

{

if(params.containsKey("params"))

{

if(params["params"].containsKey("COMMAND"))

{/*阿里平台里添加设备属性COMMAND*/

if(params["params"]["COMMAND"].is())

{

if(params["params"]["COMMAND"].as()=="restart"||params["params"]["COMMAND"].as()=="reset")

{

ESP.restart();//模块重启。

}

//这里可以添加其他属性设置代码。

if(params["params"].containsKey("mode"))

{/*阿里平台里添加设备属性LED*/

if(params["params"]["mode"].is())

{

if(params["params"]["mode"].as()==0)

{

digitalWrite(led,0),MySerial_stm32.print("F");

}

if(params["params"]["mode"].as()==1)

{

digitalWrite(led,1),MySerial_stm32.print("T");

}

int start_flag;

int i;

int count;

int data_control[9]; //接收区存储数据

int recent_data[3];

void read_usart()

{

i = MySerial_stm32.available(); //返回目前串口接收区内的已经接受的数据量

if(i != 0)

{

Serial.print("串口接收到的数据量为:");

Serial.println(MySerial_stm32.available());

while(i--)

{

recent_data[2]=recent_data[1];

recent_data[1]=recent_data[0];

recent_data[0]=MySerial_stm32.read();

Serial.println(recent_data[0]);

if(start_flag)

{

data_control[count]=recent_data[0]-48;

count++;

if(count>=9)

{

start_flag=0;

count=0;

Serial.print("数据存储完毕!\r\n");

}

if(recent_data[0]==49&&recent_data[1]==55&&recent_data[2]==49)

{

start_flag=1;

Serial.print("检测到起始位，准备开始接收数据\r\n");

}

/*初始化函数*/

void setup()

{

uint8_t Index;

Serial.begin(115200); //初始化波特率115200

/*初始化输出函数*/

MySerial_stm32.begin(9600, SERIAL_8N1, 14, 15);

pinMode(led,OUTPUT); //定义LEDIO口为输出

digitalWrite(led,LOW); //初始化灯光不亮

/*初始化WIFI参数*/

WiFi.mode(WIFI_STA); //设定WIFI的模式为STA

WiFi.begin("dong","hjsygdsgb"); //这里请使用你自己的WIFI名和密码，第一个是WIFI名，第二个是密码

Index=60; //初始化要用到的参数

Serial.print("\r\n连接WIFI..."); //在串口显示正在连接中

while(WiFi.status()!=WL_CONNECTED && Index!=0)//判断WIFI是否连接

{

Serial.print(".");Index--;delay(500);

digitalWrite(led,not digitalRead(led)); //LED慢速闪烁表示正在连接WIFI.

}

if(Index!=0) //如果Index不等于0，代表WIFI连接成功

{

Serial.println("成功!");

Serial.print("\r\n本机IP地址:");Serial.print(WiFi.localIP());Serial.print("\t\t路由器IP地址:");Serial.println( WiFi.gatewayIP());

digitalWrite(led,1);//LED常亮表示WIFI连接成功.

mqtt.begin("a10YyF1m2qH","Device","be3f7cad81ca344ad2553c5715d095c7","cn-shanghai");//这里的参数请使用你自己在阿里平台申请的设备三元组。最后一个表示站点（阿里云物联网平台有很多站点，请使用你创建设备实例的站点域名称，这里使用的是上海站）。

mqtt.addItemCallback("COMMAND",itemCommand); //属性回调.(全局回调和属性回调是互斥的,以最后注册为准).

mqtt.setCallback(callback); //全局回调.(如果不带参数调用或不调用,则默认为属性回调).

}

else

{

digitalWrite(led,0); //连接失败LED熄灭.

Serial.println("失败!");

}

void loop()

{

read_usart();

wendu_data=data_control[0]*100+data_control[1]*10+data_control[2];

ground_duty=data_control[3]*100+data_control[4]*10+data_control[5];

light_duty=data_control[6]*100+data_control[7]*10+data_control[8];

mqtt.loop(); //mqtt的回调函数，用来不断的循环处理数据

mqtt.add("light",light_duty);mqtt.send(); //输送光照数据至物联网上

mqtt.add("wendu",wendu_data);mqtt.send(); //输送温度数据至物联网上

mqtt.add("humi",ground_duty);mqtt.send(); //输送湿度数据至物联网上

delay(500);

}

总结

通过网盘分享的文件：post21资料合集

链接: https://pan.baidu.com/s/1bzNsPYzqIQXEAcqwu-e-Yg?pwd=zrw9 提取码: zrw9

—来自百度网盘超级会员v6的分享

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