Nodemcu Esp8266 , Send HTTP Request returns -1 , " ??
Posted: Fri Oct 23, 2020 11:32 amHi All
Please I need Help
I try to send HTTP Request but it fails
HTTP Code returns -1
Although the URL worked successfully on Postman and the Wifi successfully connected
I'm using WIFI manager and it works sucessfully connected to the network
Note : mysite2020 is an example , but my host worked well on POSTMAN and data posted in Database
Here is my code
Please I need Help
I try to send HTTP Request but it fails
HTTP Code returns -1
Although the URL worked successfully on Postman and the Wifi successfully connected
I'm using WIFI manager and it works sucessfully connected to the network
Note : mysite2020 is an example , but my host worked well on POSTMAN and data posted in Database
Here is my code
Code: Select all
#include <OneWire.h>
#include <DallasTemperature.h>
#include <ESP8266WiFi.h>
#include <WiFiManager.h>
#include <ESP8266HTTPClient.h>
#include <Wire.h>
IPAddress staticIP750_100(192,168,1,16);
IPAddress gateway750_100(192,168,1,1);
IPAddress subnet750_100(255,255,255,0);
HTTPClient http;
#define ONE_WIRE_BUS 2 // DS18B20 on NodeMCU pin D4
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature DS18B20(&oneWire);
float temp_0;
const char* host = "http://mysite2020.info";
void setup()
{
Serial.begin(115200);
WiFiManager wifimanger ;
DS18B20.begin();
Wire.begin(D2, D1)
WiFi.mode(WIFI_STA);
wifimanger.autoConnect("Inlet Device","12345");
while ((!(WiFi.status() == WL_CONNECTED))){
delay(300);
Serial.println("...");
}
Serial.println("WiFi connected");
WiFi.config(staticIP750_100, gateway750_100, subnet750_100);
WiFi.hostname("Inlet Device") ;
delay(3000);
Serial.println("Welcome To Device No : 1");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
Serial.println("Your Gateway is : ");
Serial.println((WiFi.gatewayIP().toString().c_str()));
Serial.println("Your Hostname is : ");
Serial.println((WiFi.hostname()));
delay(3000);
Serial.println("Welcome to my Project!");
delay(3000);
}
void loop() {
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;
}
Serial.print("Requesting URL: ");
sendtemp ();
}
void sendtemp ()
{
temp_0=23.26;
String url = "http://mysite2020.info/Api/insert_mssqlserver.php?Reading=" + String(temp_0);
Serial.println(url);
http.begin(url);
http.addHeader("Content-Type", "application/x-www-form-urlencoded");
auto httpCode = http.GET();
Serial.println(httpCode); //Print HTTP return code
String payload = http.getString();
Serial.println(payload); //Print request response payload
http.end(); //Close connection Serial.println();
Serial.println("closing connection");
delay(500);
}