Sending Multiple POST requests to Web Server
Posted: Mon Apr 13, 2020 9:38 amHere I am trying to send data from nodeMCU to two routes "/tempData" and "/updateValues". I tried the code below, but it doesn't work. Any help will be appreciated.
Code: Select all
// For WiFI Connectivity
#include <ESP8266WiFi.h>
// for temperature
#include <SimpleDHT.h>
int pinDHT22 = 2;
SimpleDHT22 dht22(pinDHT22);
// WiFi SSID
const char* ssid = "ssid";
// WiFi Password
const char* password = "password";
// Enter Server-URL here
const char* host = "server_url";
void setup() {
Serial.begin(74880);
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void loop() {
float temperature = 0;
float humidity = 0;
int err = SimpleDHTErrSuccess;
if ((err = dht22.read2(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
//Check for connection error
Serial.print("Read DHT22 failed, err="); Serial.println(err);delay(2000);
return;
}
Serial.print("connecting to ");
Serial.println(host);
// Use WiFiClient class to create TCP connections
WiFiClient client;
const int httpPort = 80;
if (!client.connect(host, httpPort)) {
Serial.println("connection failed");
return;
}
// We now create a URI for the request
String url = "/";
Serial.print("Temperature: ");
Serial.print((float)temperature); Serial.println(" *C, ");
Serial.print("Requesting URL: ");
Serial.println(url);
// Location Coordinates (hard coded) when GPS module not in use
String loc = "del";
// Package-ID of the package being trasported
String id = "H103";
String data = ("Temperature=" + String(((float)temperature)) + "&packageID=" + id + "&Location=" + loc);
Serial.print("Requesting POST: ");
// HTTP FORMAT
// Send request to the server:
client.println("POST /tempData HTTP/1.1");
client.println("Host: server_url[code][/code]");
client.println("Accept: */*");
client.println("Content-Type: application/x-www-form-urlencoded");
client.print("Content-Length: ");
client.println(data.length());
client.println();
client.print(data);
// This will send the request to the server
Serial.print("Requesting POST: ");
// HTTP FORMAT
// Send request to the server:
client.println("POST /updateValues HTTP/1.1");
client.println("Host: server_url[code][/code]");
client.println("Accept: */*");
client.println("Content-Type: application/x-www-form-urlencoded");
client.print("Content-Length: ");
client.println(data.length());
client.println();
client.print(data);
// This will send the request to the server
unsigned long timeout = millis();
while (client.available() == 0) {
if (millis() - timeout > 5000) {
Serial.println(">>> Client Timeout !");
client.stop();
return;
}
}
// Read all the lines of the reply from server and print them to Serial
while(client.available()){
String line = client.readStringUntil('\r');
Serial.print(line);
}
Serial.println();
Serial.println("closing connection");
}