JSON API not working? Send via URL encode

Questions
1

I am trying to send a JSON call via URL encode but it does not seem to work?

My Json:

{"MultiRelay":{"relay":0,"on":true}}

Converted:

%7B%22MultiRelay%22%3A%7B%22relay%22%3A0%2C%22on%22%3Atrue%7D%7D

My call string:

http://192.168.178.59/json?data=%7B%22MultiRelay%22%3A%7B%22relay%22%3A0%2C%22on%22%3Atrue%7D%7D

The Multi-Relay should witch … but does not do?

2

you need to POST JSON

3

So I can not just put this url in a browser?

4

I managed to put it in a post request:

void postJSON() {
  // Your JSON data
  String jsonData = "{\"MultiRelay\":{\"relay\":0,\"on\":true}}";

  // Your server's IP address or domain
  String serverIP = "192.168.178.59";

  // Create an HTTPClient object
  HTTPClient http;

  // Your URL
  String url = "http://" + serverIP + "/json";

  // Send the POST request with JSON data in the body
  http.begin(url);
  http.addHeader("Content-Type", "application/json");
  int httpCode = http.POST(jsonData);

  // Check for a successful POST request
  if (httpCode > 0) {
    String payload = http.getString();
    Serial.println(httpCode);
    Serial.println(payload);
  } else {
    Serial.println("Error in POST request");
  }

  http.end();
}

… that works!

5

Use /json/state as it is leaner.

6

How would that look like given that function I currently have:

void jsonRequest(String jsonData) {
  HTTPClient http;
  String url = baseUrl + "json";

  // Send the POST request with JSON data in the body
  http.begin(url);
  http.addHeader("Content-Type", "application/json");
  int httpCode = http.POST(jsonData);

  // Check for a successful POST request
  if (httpCode > 0) {
    String payload = http.getString();
    Serial.println(httpCode);
    Serial.println(payload);
  } else {
    Serial.println("Error in POST request");
  }

  http.end();
}
void loop() {
  jsonRequest("{MultiRelay:{relay:1,on:false}}");
}
7

If I understand correctly instead of:

String url = baseUrl + "json";

… I write:

String url = baseUrl + "json/state";

The benefit being? It creates a smaller feedback response?