• 日期: 2024-09-04 23:15:07
  • 标签: 常规

//引入ESP8266.h头文件，建议使用教程中修改后的文件 #include 'ESP8266.h' #include 'dht11.h' #include 'SoftwareSerial.h' #include<WiFi.h> #include<Servo.h>

//配置ESP8266WIFI设置 #define SSID 'HONOR Play4T' //填写2.4GHz的WIFI名称，不要使用校园网 #define PASSWORD '12345678'//填写自己的WIFI密码 #define HOST_NAME 'api.heclouds.com' //API主机名称，连接到OneNET平台，无需修改 #define DEVICE_ID '1099655073' //填写自己的OneNet设备ID #define HOST_PORT (80) //API端口，连接到OneNET平台，无需修改 String APIKey = 'IiJSs17atNND2C77wumz03w63hw='; //与设备绑定的APIKey String lightDatastreamId = 'light'; //光线数据流ID #define INTERVAL_SENSOR 5000 //定义传感器采样及发送时间间隔

//创建dht11示例

dht11 DHT11; //创建舵机 Servo myservo; int servoPin=7; int light=0; int servoPos=0; //定义DHT11接入Arduino的管脚 #define DHT11PIN 4

//定义ESP8266所连接的软串口 /*********************

  • 该实验需要使用软串口
  • Arduino上的软串口RX定义为D3,
  • 接ESP8266上的TX口,
  • Arduino上的软串口TX定义为D2,
  • 接ESP8266上的RX口.
  • D3和D2可以自定义,
  • 但接ESP8266时必须恰好相反 *********************/ SoftwareSerial mySerial(3, 2); ESP8266 wifi(mySerial);

void handleCommand(String command) { Serial.print('Command received: '); Serial.println(command);

if (command == '0') { //控制舵机转到0度位置 myservo.write(0); servoPos = 0; light=0; Serial.println('Servo position: 0'); myservo.write(servoPos); } else if (command == '1') { //控制舵机转到180度位置 myservo.write(180); servoPos = 180; light=1; Serial.println('Servo position: 180'); myservo.write(servoPos); } else { Serial.println('Invalid command'); } }

void setup() { mySerial.begin(115200); //初始化软串口 Serial.begin(9600); //初始化串口 Serial.print('setup begin ');

myservo.attach(servoPin); myservo.write(0);

//以下为ESP8266初始化的代码 Serial.print('FW Version: '); Serial.println(wifi.getVersion().c_str());

if (wifi.setOprToStation()) { Serial.print('to station ok '); } else { Serial.print('to station err '); }

//ESP8266接入WIFI if (wifi.joinAP(SSID, PASSWORD)) { Serial.print('Join AP success '); Serial.print('IP: '); Serial.println(wifi.getLocalIP().c_str()); } else { Serial.print('Join AP failure '); } Serial.println(''); Serial.print('DHT11 LIBRARY VERSION: '); Serial.println(DHT11LIB_VERSION);

mySerial.println('AT+UART_CUR=9600,8,1,0,0'); mySerial.begin(9600); Serial.println('setup end ');

}

unsigned long net_time1 = millis(); //数据上传服务器时间 unsigned long net_time2 = millis(); //获取光线数据时间

void loop(){

if (net_time1 > millis()) net_time1 = millis();

if (millis() - net_time1 > INTERVAL_SENSOR) //发送数据时间间隔 {

int chk = DHT11.read(DHT11PIN);

Serial.print('Read sensor: ');
switch (chk) {
  case DHTLIB_OK:
    Serial.println('OK');
    break;
  case DHTLIB_ERROR_CHECKSUM:
    Serial.println('Checksum error');
    break;
  case DHTLIB_ERROR_TIMEOUT:
    Serial.println('Time out error');
    break;
  default:
    Serial.println('Unknown error');
    break;
}

float sensor_hum = (float)DHT11.humidity; float sensor_tem = (float)DHT11.temperature; Serial.print('Humidity (%): '); Serial.println(sensor_hum, 2);

Serial.print('Temperature (oC): ');
Serial.println(sensor_tem, 2);
Serial.println('');

if (wifi.createTCP(HOST_NAME, HOST_PORT)) { //建立TCP连接，如果失败，不能发送该数据
  Serial.print('create tcp ok

'); char buf[10];

  //拼接发送data字段字符串
  String jsonToSend = '{\'Temperature\':';
  dtostrf(sensor_tem, 1, 2, buf);
  jsonToSend += '\'' + String(buf) + '\'';
  jsonToSend += ',\'Humidity\':';
  dtostrf(sensor_hum, 1, 2, buf);
  jsonToSend += '\'' + String(buf) + '\'';
  jsonToSend += '}';

  //拼接POST请求字符串
  String postString = 'POST /devices/';
  postString += DEVICE_ID;
  postString += '/datapoints?type=3 HTTP/1.1';
  postString += '\r\n';
  postString += 'api-key:';
  postString += APIKey;
  postString += '\r\n';
  postString += 'Host:api.heclouds.com\r\n';
  postString += 'Connection:close\r\n';
  postString += 'Content-Length:';
  postString += jsonToSend.length();
  postString += '\r\n';
  postString += '\r\n';
  postString += jsonToSend;
  postString += '\r\n';
  postString += '\r\n';
  postString += '\r\n';

  const char *postArray = postString.c_str(); //将str转化为char数组

  Serial.println(postArray);
  wifi.send((const uint8_t *)postArray, strlen(postArray)); //send发送命令，参数必须是这两种格式，尤其是(const uint8_t*)
  Serial.println('send success');


  if (wifi.releaseTCP()) { //释放TCP连接
    Serial.print('release tcp ok

'); } else { Serial.print('release tcp err '); } postArray = NULL; }//清空数组，等待下次传输数据 else(Serial.print('create tcp err ')); Serial.println(''); net_time1 = millis(); }

if (millis() - net_time2 > INTERVAL_SENSOR) //获取光线数据时间间隔 { //拼接GET请求字符串 String getStr = 'GET /devices/'; getStr += DEVICE_ID; getStr += '/datastreams/'; getStr += lightDatastreamId; getStr += '?'; getStr += 'limit=1'; getStr += ' HTTP/1.1'; getStr += '\r\n'; getStr += 'api-key:'; getStr += APIKey; getStr += '\r\n'; getStr += 'Host:api.heclouds.com\r\n'; getStr += 'Connection:close\r\n'; getStr += '\r\n';

const char *getArray = getStr.c_str(); //将str转化为char数组

if (wifi.createTCP(HOST_NAME, HOST_PORT)) { //建立TCP连接，如果失败，不能发送该数据
  Serial.print('create tcp ok

');

  wifi.send((const uint8_t *)getArray, strlen(getArray)); //send发送命令，参数必须是这两种格式，尤其是(const uint8_t*)

  char buf[1000];
  memset(buf, 0, 1000); //清空数组

  wifi.recv((uint8_t *)buf, 1000, 10000); //接收服务器返回的json数据

  Serial.println(buf);

  //解析json数据，获取light值
  DynamicJsonDocument doc(1024);
  deserializeJson(doc, buf);
  JsonObject data = doc['datastreams'][0]['datapoints'][0];
  int lightValue = data['value'];
  Serial.print('Light value: ');
  Serial.println(lightValue);

  if (lightValue == 0 && light == 1) { //如果光线较暗且舵机位置为180度，则控制舵机转到0度位置
    handleCommand('0');
  } else if (lightValue == 1 && light == 0) { //如果光线较亮且舵机位置为0度，则控制舵机转到180度位置
    handleCommand('1');
  }

  if (wifi.releaseTCP()) { //释放TCP连接
    Serial.print('release tcp ok

'); } else { Serial.print('release tcp err '); } getArray = NULL; }//清空数组，等待下次传输数据 else(Serial.print('create tcp err ')); Serial.println(''); net_time2 = millis(); }

ESP8266 DHT11温湿度传感器数据上传到OneNET并控制舵机

原文地址: https://www.cveoy.top/t/topic/oM3F 著作权归作者所有。请勿转载和采集!

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