Question

我正在从传感器收集数据，我想将它们保存到数据库中。所以我用Java API来保存数据库中的数据。我在邮递员中测试了该API，并且一切正常。但是似乎我在部分arduino代码上存在一些问题，我在其中发送了POST请求。有人可以帮我做那部分吗？

#include <SoftwareSerial.h>
#include "cactus_io_AM2302.h"
#include <BMP280.h>

#define AM2302_PIN 2                                
BMP280 bmp;
#define RX 10
#define TX 11
#define P0 1013.25
String AP = "xxxx";       // CHANGE ME
String PASS = "xxxxx"; // CHANGE ME

String API = "????";   // CHANGE ME
String HOST = "api.thingspeak.com";
String PORT = "80";

String Host = "192.168.0.87:8080" ;
String Url = "/e/api/environment_data/sendData" ;

int countTrueCommand;
int countTimeCommand; 
boolean found = false; 
int valSensor = 1;
SoftwareSerial esp8266(RX,TX); 
AM2302 dht(AM2302_PIN);                             


double T = 0; 
double P = 0; 
char measure = 0;
float pritisak = 0;


void setup() {
  Serial.begin(9600);
  esp8266.begin(115200);
  sendCommand("AT",5,"OK");
  sendCommand("AT+CWMODE=1",5,"OK");
  sendCommand("AT+CWJAP=\""+ AP +"\",\""+ PASS +"\"",20,"OK");

  //am2302(dht)
  dht.begin();

  //BMP280 
   if(!bmp.begin()) {             
    while(1);
    }
    bmp.setOversampling(4);
}
void loop() {

  dht.readHumidity();
  dht.readTemperature();

  if (isnan(dht.humidity) || isnan(dht.temperature_C)) {
    return;
  }
  float temperatura = dht.temperature_C;
  float vlaznost = dht.humidity;


  float kvalitet_zraka = analogRead(0);

  pritisak = collectData();

  Serial.println("Sending data: " + String(temperatura));
  String urlfinal = "?temperature="+String(temperatura) + "&humidity=" + String(vlaznost) + "&airQuality=" + String(kvalitet_zraka) + "&pressure=" + String(pritisak);


  String Post = "POST " + Url + " HTTP/1.1\r\n" + 
  "Host: " + Host + "\r\n" + 
  "Content-Type: application/x-www-form-urlencoded" +
  "Content-Length: " + urlfinal.length() + "\r\n" + urlfinal +
  "\r\n" + ;
  sendCommand("AT+CIPMUX=1",5,"OK");
  sendCommand("AT+CIPSTART=0,\"TCP\",\""+ Host +"\","+ 8080,15,"OK"); 
  sendCommand("AT+CIPSEND=0," + String(Post.length()+4),4,">");
  esp8266.println(Post);
  Serial.println(Post);
  delay(30000);
  countTrueCommand++;
  sendCommand("AT+CIPCLOSE=0",5,"OK");
}

void sendCommand(String command, int maxTime, char readReplay[]) {
  while(countTimeCommand < (maxTime*1)) {
    esp8266.println(command);
    if(esp8266.find(readReplay)) {
      found = true;
      break;
    }
    countTimeCommand++;
  }

  if(found == true) {
    countTrueCommand++;
    countTimeCommand = 0;
  }

  if(found == false) {
    countTrueCommand = 0;
    countTimeCommand = 0;
  }
  found = false;
}

float collectData() {
  measure = bmp.startMeasurment();
  if(measure != 0) {
    delay(measure);
    measure = bmp.getTemperatureAndPressure(T, P);
    if(measure != 0) {
      P = P + 17;
      T = T - 0.8; 
      return P;
      delay(30000);
    }
    else
      return 0;
  }
  else
    return 0;
}

我在串行监视器中打印出Postln，这是它的样子：

POST /e/api/environment_data/sendData HTTP/1.1
Host: 192.168.0.27:8080
Content-Type: application/x-www-form-urlencodedContent-Length: 67
?temperature=27.60&humidity=59.70&airQuality=37.00&pressure=1002.39

我也检查了wifi模块的连接，也没关系，因为它可以将数据保存到Thingspeak，但是当我尝试将数据保存到localhost数据库时，则无法正常工作。

Answer 1

几件事：

1：POST数据不是以“？”开头（获取）

2：标题和数据之间必须为空行

3：Content-Type之后必须换行

4：数据后没有新行

因此它将变为：

      String urlfinal = "temperature="+String(temperatura) + "&humidity=" + String(vlaznost) + "&airQuality=" + String(kvalitet_zraka) + "&pressure=" +  String(pritisak);
      String Post = "POST " + Url + " HTTP/1.1\r\n" + 
      "Host: " + Host + "\r\n" + 
      "Content-Type: application/x-www-form-urlencoded; charset=UTF-8\r\n" +
      "Content-Length: " + urlfinal.length() + "\r\n\r\n" + urlfinal";

我也将字符集添加到了Content-Type中，尽管这并不总是必需的。

Arduino Mega和ESP8266-POST请求

1 个答案: