我想将 POST 请求从 arduino 发送到 mysql 工作台并保存值

I want to send POST request from arduino to mysql workbench and save the value

本文关键字：mysql 工作台 保存 POST 请求 arduino      更新时间：2023-10-16

我已经在 Spring 引导应用程序中创建了 api。 我的 Arduino 代码在 Arduino 日志中返回 -1 (httpcode(。所以我的 api 对 POST 数据是什么 http://localhost:8080/ApparelProject/device/saveDistance/{值} 以下是我的Arduino代码。

Arduino 代码

#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h> 
// defines pins numbers
const int trigPin = 2;  //D4
const int echoPin = 0;  //D3
// defines variables
long duration;
int distance;
void setup() {
pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
Serial.begin(9600); // Starts the serial communication
}
void loop() {
// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);
// Calculating the distance
distance= duration*0.034/2;
// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);
HTTPClient http;
http.begin("http://localhost:8080/ApparelProject/device/saveDistance");
http.addHeader("Content-Type", "text/plain;charset=UTF-8");
int httpCode = http.POST("125");
Serial.println(httpCode);
http.end();
/* HTTPClient http;
String url = "localhost:8080/ApparelProject/device/saveDistance/"+String(distance);
Serial.println(url);
//localhost:8080/ApparelProject/device/saveDistance/20000    
http.begin(url);
//POST method
int httpCode = http.GET();
Serial.println(httpCode);
http.end();*/
delay(2000);
}

弹簧代码

@RequestMapping(value = "/saveDistance/{distance}", method = RequestMethod.POST)
public String saveDistance(HttpServletRequest request, @PathVariable(value ="distance") String distance) {
System.out.println(distance);
return distanceimpl.saveDistance(distance);
}

尝试这样的事情。

HTTPClient http;
http.begin("http://localhost:8080/ApparelProject/device/saveDistance/125");
http.addHeader("Content-Type", "text/plain;charset=UTF-8");
int httpCode = http.POST();
Serial.println(httpCode);
http.end();

尝试这样的事情以确保连接正常工作。

void setup() {
Serial.begin(115200);
delay(4000);   //Delay needed before calling the WiFi.begin
WiFi.begin(ssid, password); 
while (WiFi.status() != WL_CONNECTED) { //Check for the connection
delay(1000);
Serial.println("Connecting to WiFi..");
}
Serial.println("Connected to the WiFi network");
}

试试这个... 为此，您将需要ArduinoJSON库。

StaticJsonBuffer<300> JSONbuffer;   //Declaring static JSON buffer
JsonObject& JSONencoder = JSONbuffer.createObject();
JSONencoder["value"] = "125"; //or some variable
char JSONmessageBuffer[300];
JSONencoder.prettyPrintTo(JSONmessageBuffer, sizeof(JSONmessageBuffer));
HTTPClient http;    //Declare object of class HTTPClient
http.begin("http://Your_PC_IP_Address:8080/ApparelProject/device/saveDistance");      //Specify request destination
http.addHeader("Content-Type", "application/json");  //Specify content-type header
int httpCode = http.POST(JSONmessageBuffer);   //Send the request
String payload = http.getString();                  //Get the response payload

它为您提供了这种JSON数组。

{
value:"125"
}

根据该更改，您的后端 API 抱歉，我对 Spring 端点知之甚少。

相关文章：