Http requests to Localhost from esp8266

Using Arduino Networking, Protocols, and Devices
1

I am working with esp8266, and I want to access some data from my php laravel apis hosted on my laptop, so far I am unable to do so.
I have set up a mobile hotspot on my laptop and connected my phone to the laptop's hotspot.
My laptop IPv4 is : http://192.168.100.40/
and postman gives appropriate responses.
Also I check on my mobile device by connecting it to laptop's hotspot and I get appropriate responses.

here is my esp8266 code:

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <DNSServer.h>
#include <WiFiManager.h>
// #include <HttpClient.h>
#include <ESP8266mDNS.h>
#include <ArduinoJson.h>
#include <ESP8266HTTPClient.h>
DNSServer dnsServer;
WiFiManager wifiManager;

void setup() {
  Serial.begin(9600);
  // WiFi.disconnect(true);
  // ESP.eraseConfig();
  // Connect to WiFi
  WiFiManager wifiManager;
  wifiManager.setTitle("esp");
  wifiManager.setDarkMode(true);
  wifiManager.autoConnect("esp");
  // Print MAC address
  Serial.print("MAC address: ");
  Serial.println(WiFi.macAddress());
  // Configure mDNS
  if (!MDNS.begin("esp")) {
    Serial.println("Error setting up MDNS responder!");
    while(1) { 
      delay(1000);
    }
  }
  Serial.println("mDNS responder started");
  
  // Start DNS server
  dnsServer.start(53, "*", WiFi.softAPIP());


  server.begin();
  Serial.println("HTTP server started");
  Serial.print("entering handle root");
  // Retrieve users data
 WiFiClient client;
  HTTPClient http;

  String url = "http://192.168.100.40:8000/api/users";

  if (http.begin(client, url)) {
    int httpCode = http.GET();

    if (httpCode > 0) {
      Serial.print(httpCode);
      if (httpCode == HTTP_CODE_OK) {

        String payload = http.getString();
        Serial.println("HTTP GET request successful");
        Serial.println("Response: " + payload);
      }
    } else {
      Serial.println("HTTP GET request failed");
    }

    http.end();
  } else {
    Serial.println("Unable to connect to server");
  }
  
}

void loop() {
  server.handleClient();
  MDNS.update();
}

Serial monitor response: HTTP GET request failed

2

please print

httpCode

and tell us what you get.

PS.: section

Using Arduino / Networking, Protocols, and Devices

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3

it doesn't get to httpcode, it fails the first check if (http.begin(client, url))
and thanks for the suggestion, I will do that

4

it does, otherwise it would not print what you have written.
If begin would fail, it should write

Unable to connect to server
5

you are right, I overlooked it

6

thanks for your help, but I just figured out the problem
the problem was the firewall and not the code itself, I configured firewall to enable inbound requests for ports 80 and 3000, and response is received from the localhost.

7

.
Good to hear.
You can mark your thread as solved.
You can say thank you to helpers with the heart.

1 Like
8

alright, I will do that

9

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