hi guys.
the problem is that i get -1 http code that means localhost didnot get data and in localhost htdoc that data didnot created.
so this is my code:
// For wifi and http connection
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266HTTPClient.h>
#include <HttpClient.h>
const char* ssid = "******";
const char* password = "********";
const char* post_link = "http://localhost/Nodemcu/test.php";
String postData;
void setup()
{
Serial.begin(115200);
// -------------------------------------------------------- status of connection to wifi
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");
//-------------------------------------------------------------------- send hello world to localhost
send_to_server("hello world");
}
void loop()
{
}
// -------------------------------------------------------------- send function
void send_to_server(String postData) {
HTTPClient http; //Declare object of class HTTPClient
if (WiFi.status() == WL_CONNECTED)
{ //Check WiFi connection status
// Send and get Data
http.begin(post_link); //Specify request destination
http.addHeader("Content-Type", "application/x-www-form-urlencoded"); //Specify content-type header
int httpCode = http.POST(postData); //Send the request
Serial.println(httpCode); //Print HTTP return code
http.end(); //Close connection
Serial.println(postData);
}
else
{
Serial.println("Error in WiFi connection");
}
delay(500); // interval
}
//************************************************************
<?php
$time = time();
$postData = $_POST["postData"];
$file = 'postData.html';
$data = $time." - ".$postData;
file_put_contents($file, $data);
?>
blh64
April 7, 2020, 5:47pm
2
You are saying the content is 'application/x-www-form-urlencoded' but you are sending a String.
Hare you tried just sending a simple string as plain text? Does that work? link
okay. To ensure i exactly copy the code of the link and edit it and upload it to my nodemcu. but still i get -1.
xamp is run and apache is on.
my nodemcu code: ----------------------------------------------------------------------
#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h>
void setup() {
Serial.begin(115200); //Serial connection
WiFi.begin("******", "********"); //WiFi connection
while (WiFi.status() != WL_CONNECTED) { //Wait for the WiFI connection completion
delay(500);
Serial.println("Waiting for connection");
}
}
void loop() {
if (WiFi.status() == WL_CONNECTED) { //Check WiFi connection status
HTTPClient http; //Declare object of class HTTPClient
http.begin("http://localhost"); //Specify request destination
http.addHeader("Content-Type", "text/plain"); //Specify content-type header
int httpCode = http.POST("Message from ESP8266"); //Send the request
String payload = http.getString(); //Get the response payload
Serial.println(httpCode); //Print HTTP return code
Serial.println(payload); //Print request response payload
http.end(); //Close connection
} else {
Serial.println("Error in WiFi connection");
}
delay(30000); //Send a request every 30 seconds
}
my php code in xamp htdocs: ----------------------------------------------------------------------
<?php
$data = json_encode($_POST);
$file = 'result.txt';
file_put_contents($file, $data);
?>
blh64
April 7, 2020, 10:19pm
4
Can another device connect to localhost?
blh64:
i can connect with my laptop browser.
In this case, 'localhost' is your Arduino, not your PC.
Find the address of the PC and replace localhost by the IP address.
As an example
//http.begin("http://localhost"); //Specify request destination
http.begin("http://192.168.123.123"); //Specify request destination
Your xampp needs to be listening on the given IP address, not on localhost.http://localhost . What happens when you use http://192.168.1.37 ? Can you connect? If not, you'll need to reconfigure xampp.
Do the xampp logs give any indication?
But I'm further not familiar with Arduino/NodeMCU and posting to web servers so probably out of here.
sterretje:
Find the address of the PC and replace localhost by the IP address.
As an example
//http.begin("http://localhost"); //Specify request destination
http.begin("http://192.168.123.123 "); //Specify request destination
okay. i test what u said but still it get me -1.
this is my nodemcu code:
#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h>
void setup() {
Serial.begin(115200); //Serial connection
WiFi.begin("******", "*******"); //WiFi connection
while (WiFi.status() != WL_CONNECTED) { //Wait for the WiFI connection completion
delay(500);
Serial.println("Waiting for connection");
}
}
void loop() {
if (WiFi.status() == WL_CONNECTED) { //Check WiFi connection status
HTTPClient http; //Declare object of class HTTPClient
http.begin("http://192.168.*.**"); //Specify request destination
http.addHeader("Content-Type", "text/plain"); //Specify content-type header
int httpCode = http.POST("Message from ESP8266"); //Send the request
String payload = http.getString(); //Get the response payload
Serial.println(httpCode); //Print HTTP return code
Serial.println(payload); //Print request response payload
http.end(); //Close connection
} else {
Serial.println("Error in WiFi connection");
}
delay(30000); //Send a request every 30 seconds
}
and this is my php in localhost:
<?php
$data = json_encode($_POST);
$file = 'result.txt';
file_put_contents($file, $data);
?>
one point is that when i search my ip in browset, in htdocs php creat a txt file as "result" that means the localhost side is okay but nodemcu cannot send.
another thing i test that i replace "http.begin("http://192.168 ..**")" to another real server "http.begin("http:// ***.ir/test)" and it didnot work too.
i think there is a problem with my nodemcu but i donot know how to test it that it work properly or not in posting data.
Forget about the nodemcu for now. Use a normal browser.
sterretje:http://localhost . What happens when you use http://192.168.1.37 ? Can you connect? If not, you'll need to reconfigure xampp.
Do the xampp logs give any indication?
I will add the you might want to create an index.html with some basic text in there.