i am using esp32 as a client and using following example. So here i am getting header response only that is 200. I am not getting any response after that. here is the example

#include <WiFi.h>
#include <HTTPClient.h>
const char* ssid = "yourNetworkName";
const char* password =  "yourPassword";
void setup() {
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    Serial.println("Connecting to WiFi..");
  Serial.println("Connected to the WiFi network");
void loop() {
  if ((WiFi.status() == WL_CONNECTED)) { //Check the current connection status
    HTTPClient http;
    http.begin("http://jsonplaceholder.typicode.com/comments?id=10"); //Specify the URL
    int httpCode = http.GET();                                        //Make the request
    if (httpCode > 0) { //Check for the returning code
        String payload = http.getString();
    else {
      Serial.println("Error on HTTP request");
    http.end(); //Free the resources

given url works with me as well. but if i give other url then i am getting response as 200 only. but not receiving json data which is present on the request url.

  • Your code works without any problem. What do you means "but if i give other url"? BTW, if you are using esp32, don't tag esp8266.
    – hcheung
    Commented Jul 10, 2020 at 14:05

1 Answer 1


A 200 response doesn't guarantee that your payload will actually contain any data. It depends on the server. The server might determine to respond with a 200 code but still not return any JSON code for your request.

I am not at all sure, but the server may be rejecting your request because it doesn't like your user agent. I have seen my own ESP8266 supply ESP8266HTTPClient as its user agent for HTTP requests. You can see from the source code of the HttpClient class that this is the default:

    : _client(nullptr), _userAgent(F("ESP8266HTTPClient"))
// etc...

You might consider setting the user agent for your http client object:

http.setUserAgent("Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0");

If you'd like to investigate a bit more, you might use curl from the command line (this works on linux) to emulate the http request being formulated by your ESP device:

curl -vA "ESP8266HTTPClient" http://jsonplaceholder.typicode.com/comments?id=10

On my linux machine, this returns all the HTTP header information, followed by some JSON for the url you've specified in your code:

    "postId": 2,
    "id": 10,
    "name": "eaque et deleniti atque tenetur ut quo ut",
    "email": "[email protected]",
    "body": "voluptate iusto quis nobis reprehenderit ipsum amet nulla\nquia quas dolores velit et non\naut quia necessitatibus\nnostrum quaerat nulla et accusamus nisi facilis"

Maybe try that with the other url and see what comes out?

You might also modify your post with the Serial output of your sketch to provide more detail.

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