I'm sending json to client and ı got unknown characters

Projects Programming
1

Hi everyone,

My arduino is server , ı'm sending json to my c++ client socket program. and ı got unknown chars as you see.

and the other problem is when the first command I sent is not working, but the second one I sent is working for example 1 is for getting info, I'm sending but not working , when ı send again ıt works, how ı am gonna fix those problems thx.

here is my code:

#include <SPI.h>
#include <Ethernet.h>
#include <ArduinoJson.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192, x, x,x);
IPAddress gateway( 10, 0, 0, 1 );
IPAddress subnet(255, 255, 0, 0);
EthernetServer server(5002);
boolean alreadyConnected = false; // whether or not the client was connected previously
StaticJsonDocument<300> doc;
String inData; //char inData;

void setup() {

 // initialize the ethernet device
 Ethernet.begin(mac, ip, gateway, subnet);
 // start listening for clients
 server.begin();
// Open serial communications and wait for port to open:
 Serial.begin(9600);

 String inData; //char inData;
 char json[] = "{\"model\":\"Arduino UNO R3 - USB Chip CH340\",\"micro\":\"Microcontroller: ATmega328\",\"flash\":\"Flash Memory: 32 KB (ATmega328) 0.5 KB bootloader\",\"sram\":\"SRAM: 2 KB (ATmega328)\" ,\"eeprom\":\"EEPROM: 1 KB (ATmega328)\"}"; 
 DeserializationError error = deserializeJson(doc, json);

  // Test if parsing succeeds.
  if (error) {
    Serial.print(F("deserializeJson() failed: "));
    Serial.println(error.c_str());
    return;
  }

  const char* model = doc["model"];
  const char* micro = doc["micro"];
  const char* flash= doc["flash"];
  const char* sram = doc["sram"];
  const char* eeprom = doc["eeprom"];
  // Print values.
  Serial.println(model);
  Serial.println(micro);
  Serial.println(flash);
  Serial.println(sram);
  Serial.println(eeprom);
 Serial.println(Ethernet.localIP());
}

void loop() {
 // wait for a new client:
 EthernetClient client = server.available();

 // when the client sends the first byte, say hello:
 if (client) {
   if (!alreadyConnected) {
     // clead out the input buffer:
     client.flush();    
     alreadyConnected = true;
   }

  if (client.available() > 0) {
     // read the bytes incoming from the client:
     char thisChar = client.read();
     inData += thisChar;
     // echo the bytes to the server as well:
     Serial.println(thisChar);
  }
if (inData == "1") {

 server.write("Information is loading..");
 serializeJsonPretty(doc, client);
 
}

inData="";

       }
       

       }

the c++ client socket side:

// Do-while loop to send and receive data
	char buf[4096];
	
	string userInput;
	cout << "Getting information about device: 1" << endl;
	do
	{
		
		// Prompt the user for some text
		cout << "> ";
		getline(cin, userInput);

		if (userInput.size() > 0)		// Make sure the user has typed in something
		{
			// Send the text
			int sendResult = send(sock, userInput.c_str(), userInput.size() + 1, 0);
			if (sendResult != SOCKET_ERROR)
			{
				// Wait for response
				ZeroMemory(buf, 4096);
				int bytesReceived = recv(sock, buf, 4096, 0);
				if (bytesReceived > 0)

				{
					// Echo response to console
					cout << "SERVER> " << string(buf, 0, bytesReceived) << endl;
				}
				
			}
		}

	} while (userInput.size() > 0);