Question

我正试图通过ESP8266将温度数据从arduino发送到thingpeak，但我没有配置我的WiFi的代码。我正在搜索过去两天的代码，但没有工作。请提供代码，使用SSID和密码连接到我的本地wifi。

#include <SoftwareSerial.h>
#define BUFFER_SIZE 512
#define GET_SIZE 64
#define dbg Serial  // USB local debug
#include <dht11.h>

dht11 DHT11;

#define DHT11PIN 7
int ledPin = 13;
int lightLevel;
String apiKey = "20YMPJA0XII0IEF4";
SoftwareSerial ser(2,3);
SoftwareSerial esp(11, 12);
String ssid = "ATL-WL";
String pass = "atl#yd81";
String serverPort = "80";

char buffer[BUFFER_SIZE]; // Don't touch
char get_s[GET_SIZE];
char OKrn[] = "OK\r\n"; // Don't touch

String currentCommand = "0000";

byte waitForEsp(int timeout, char* term = OKrn) {
  unsigned long t = millis();
  bool found = false;
  int i = 0;
  int len = strlen(term);
  while (millis() < t + timeout) {
    if (esp.available()) {
      buffer[i++] = esp.read();
      if (i >= len) {
        if (strncmp(buffer + i - len, term, len) == 0) {
          found = true;
          break;
        }
      }
    }
  }
  buffer[i] = 0;
  dbg.print(buffer);
  return found;
}
//Celsius to Fahrenheit conversion
double Fahrenheit(double celsius)
{
  return 1.8 * celsius + 32;
}

//Celsius to Kelvin conversion
double Kelvin(double celsius)
{
  return celsius + 273.15;
}

double dewPoint(double celsius, double humidity)
{
  // (1) Saturation Vapor Pressure = ESGG(T)
  double RATIO = 373.15 / (273.15 + celsius);
  double RHS = -7.90298 * (RATIO - 1);
  RHS += 5.02808 * log10(RATIO);
  RHS += -1.3816e-7 * (pow(10, (11.344 * (1 - 1/RATIO ))) - 1) ;
  RHS += 8.1328e-3 * (pow(10, (-3.49149 * (RATIO - 1))) - 1) ;
  RHS += log10(1013.246);

        // factor -3 is to adjust units - Vapor Pressure SVP * humidity
  double VP = pow(10, RHS - 3) * humidity;

        // (2) DEWPOINT = F(Vapor Pressure)
  double T = log(VP/0.61078);   // temp var
  return (241.88 * T) / (17.558 - T);
}

double dewPointFast(double celsius, double humidity)
{
  double a = 17.271;
  double b = 237.7;
  double temp = (a * celsius) / (b + celsius) + log(humidity*0.01);
  double Td = (b * temp) / (a - temp);
  return Td;
}
void setup() {

  pinMode(13, OUTPUT); // For debugging purposes w/o USB
  // Set baud rates
  digitalWrite(13, HIGH);
  esp.begin(9600);
  dbg.begin(9600);
  ser.begin(9600);
  dbg.println("DEBUG: Running Setup");
  // Reset ESP, Test, Configure, Connect, Start Server
  esp.println("AT+RST"); // Reset
  waitForEsp(4000);
  esp.println("AT"); // Test
  waitForEsp(2000);
  esp.println("AT+CWMODE=1"); // Set to client mode
  waitForEsp(2000);
  esp.println("AT+CWJAP=\"" + ssid + "\",\"" + pass + "\""); // Join AP
  delay(8000); // Sometimes joining is really slow...
  waitForEsp(6000);
  esp.println("AT+CIPMUX=1"); // Allow multiple connections
  waitForEsp(2000);
  esp.println("AT+CIPSERVER=1," + serverPort); // Start server on port
  waitForEsp(2000);
  esp.println("AT+CIFSR");
  waitForEsp(1000);
  dbg.println("DEBUG: Setup complete\n\n");
  digitalWrite(13, LOW);
    ser.println("AT+RST");
}

void loop()
{
    // blink LED on board
  digitalWrite(ledPin, HIGH);   
  delay(200);               
  digitalWrite(ledPin, LOW);
  int lightLevel = analogRead(A0);
  Serial.println("\n");

  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;
  }

  Serial.print("Humidity (%): ");
  Serial.println((float)DHT11.humidity, 2);

  Serial.print("Temperature (°C): ");
  Serial.println((float)DHT11.temperature, 2);

  Serial.print("Temperature (°F): ");
  Serial.println(Fahrenheit(DHT11.temperature), 2);

  Serial.print("Temperature (°K): ");
  Serial.println(Kelvin(DHT11.temperature), 2);

  Serial.print("Dew Point (°C): ");
  Serial.println(dewPoint(DHT11.temperature, DHT11.humidity));

  Serial.print("Dew PointFast (°C): ");
  Serial.println(dewPointFast(DHT11.temperature, DHT11.humidity));
  Serial.print("Light Level: ");
  Serial.println(lightLevel);
  esp_8266();
}
void esp_8266()
{
 // convert to string
  char buf[32];
  String strTemp = dtostrf( DHT11.temperature, 4, 1, buf);
  Serial.print(strTemp);
  Serial.println(" C");
  // TCP connection
  String cmd = "AT+CIPSTART=\"TCP\",\"";
  cmd += "184.106.153.149"; // api.thingspeak.com
  cmd += "\",80";
  ser.println(cmd);

  if(ser.find("Error")){
    Serial.println("AT+CIPSTART error");
    return;
  }

  // prepare GET string
  String getStr = "GET /update?api_key=";
  getStr += apiKey;
  getStr +="&field1=";
  getStr += String(strTemp);
  getStr += "\r\n\r\n";

  // send data length
  cmd = "AT+CIPSEND=";
  cmd += String(getStr.length());
  ser.println(cmd);

  if(ser.find(">")){
    ser.print(getStr);
  }
  else{
    ser.println("AT+CIPCLOSE");
    // alert user
    Serial.println("AT+CIPCLOSE");
  }

  // thingspeak needs 15 sec delay between updates
  delay(5000);  
}
//
// END OF FILE
//

Answer 1

I don't have this device nor a way to test the results but a simple Google search resulted in the following:

AT+CWJAP="<access_point_name>","<password>"

Answer 2

您需要更改：

String ssid = "ATL-WL";
String pass = "atl#yd81";

无论你的ssid和通行证是什么，你的WiFi。我也恳请你改变：

String apiKey = "20YMPJA0XII0IEF4";
String ssid = "ATL-WL";
String pass = "atl#yd81";

现在你已将它们发布到interwebz了。

您还应该确保从thingspeak.com获得新的API密钥。

您还需要确保在setup（）循环中正确处理CR / LF。当可能是错误的串行连接设置时，您可能会错误地假设代码不正确。

我试图通过ESP8266将温度数据从arduino发送到thingpeak，但是我没有配置我的wifi的代码。请帮我

2 个答案: