ESP8266 Trying to get a JSON from server

Projects Programming
1

I'm trying to connect to a TCP/IP server and send a JSON {"id":0,"jsonrpc":"2.0","method":"miner_getstat1"} to get a JSON back. I tried using GET but I would have an HTML in response. So I tried POST but I can’t get it to work.

Any help would be appreciated

#include <ESP8266WiFi.h>

const char* ssid     = "VIDEO";
const char* password = "3Y4U";

const char* host = "192.168.0.58";


void setup() {
  Serial.begin(115200);
  delay(10);

  // Connecting to  WiFi network

  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");  
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

int value = 0;

void loop() {
  delay(5000);
  ++value;

  Serial.print("connecting to ");
  Serial.println(host);
  
  // Use WiFiClient class to create TCP connections
  WiFiClient client;
  const int httpPort = 3333;
  if (!client.connect(host, httpPort)) {
    Serial.println("connection failed");
    return;
  }
  
  // We now create a URI for the request
//  String url = "/";
//  url += streamId;
//  url += "?private_key=";
//  url += privateKey;
//  url += "&value=";
//  url += value;
  
  Serial.print("Requesting URL: ");
//  Serial.println(url);
  
  // Send the request to the server
  // The server uses TCP/IP (not HTTP) for statistics, thats why I am tryng to use POST instead of GET
  // I want to send {"id":0,"jsonrpc":"2.0","method":"miner_getstat1"}
  client.print(String("POST ") + "{"id":0,"jsonrpc":"2.0","method":"miner_getstat1"}" + " \n" +
               "Host: " + host + "\r\n" + 
               "Connection: close\r\n\r\n");
  unsigned long timeout = millis();
  while (client.available() == 0) {
    if (millis() - timeout > 5000) {
      Serial.println(">>> Client Timeout !");
      client.stop();
      return;
    }
  }
  
  // Read all the lines of the reply from server and print them to Serial
  while(client.available()){
    String line = client.readStringUntil('\r');
    Serial.print(line);
  }
  
  Serial.println();
  Serial.println("closing connection");
}

test_internal_ip_tcp_2.ino (1.93 KB)

2

192.168.0.58 looks like a local server. What script are you running on this server? What program is listening on port 3333?

As far as I know, port 3333 is not an HTTP port. And you say that the server doesn't use HTTP, yet you use a request that looks an awful lot like a malformed HTTP request.

You need to escape the quotes in your JSON string.

Pieter

3

Yes I'm connecting through my local router to ethereum Miners using Claymore's dual ethereum miner software Claymore's Dual Ethereum AMD+NVIDIA GPU Miner v15.0 (Windows/Linux) . Yes, I used a WIFICLient for the esp8266 the help me, I'm really a noob.

This is the file that tells me how to connect to API on the servers

Thank for the escape the quotes. But I get a client timeout now when using POST instead of GET.

API.txt (1.86 KB)

4

Don't use POST nor GET. That's HTTP. Also get rid of the HTTP headers, just send the JSON, without anything else.

Pieter