Client Server communication between esp32 and esp8266

[hazee007]

Hello guys
am trying to use to use esp32 as a server and two esp32 as a clients,
i have a code for connecting two esp8266 together working but when i use the esp8266 code on esp32 after changing the #include <ESP8266WiFi.h> to #include <WiFi.h> it got uploaded but i am getting a different access point from the one defined in the code.

code for Server

  #include <WiFi.h>

//------------------------------------------------------------------------------------
  // Define I/O Pins
  #define     LED0        2         // WIFI Module LED

//------------------------------------------------------------------------------------
  // Authentication Variables
  char*       ssid;              // SERVER WIFI NAME
  char*       password;          // SERVER PASSWORD

//------------------------------------------------------------------------------------
  // WiFi settings
  #define     MAXSC     6           // MAXIMUM NUMBER OF CLIENTS

  IPAddress APlocal_IP(192, 168, 4, 1);
  IPAddress APgateway(192, 168, 4, 1);
  IPAddress APsubnet(255, 255, 255, 0);

  unsigned int TCPPort = 2390;
 
  WiFiServer  TCP_SERVER(TCPPort);      // THE SERVER AND THE PORT NUMBER
  WiFiClient  TCP_Client[MAXSC];        // THE SERVER CLIENTS Maximum number
//------------------------------------------------------------------------------------
  // Some Variables
  char result[10];


void setup(){
  
  // Setting the serial port
  Serial.begin(115200);           // Computer Communication
    
  // Setting the mode of the pins
  pinMode(LED0, OUTPUT);          // WIFI OnBoard LED Light
    
  // setting up a Wifi AccessPoint
  SetWifi("DataTransfer","");
}

//====================================================================================
 
void loop(){
  
  HandleClients(); 

}

//====================================================================================
 
void SetWifi(char* NameESP, char* Password123){
  // Stop any previous WIFI
  WiFi.disconnect();

  // Setting The Wifi Mode
  WiFi.mode(WIFI_AP_STA);
  Serial.println("WIFI Mode : AccessPoint");
  
  // Setting the AccessPoint name & password
  ssid      = NameESP;
  password  = Password123;
   
  // Starting the access point
  WiFi.softAPConfig(APlocal_IP, APgateway, APsubnet);                 // softAPConfig (local_ip, gateway, subnet)
  WiFi.softAP(ssid, password, 1, 0, MAXSC);                           // WiFi.softAP(ssid, password, channel, hidden, max_connection)     
  Serial.println("WIFI < " + String(ssid) + " > ... Started");
   
  // wait a bit
  delay(50);
   
  // getting server IP
  IPAddress IP = WiFi.softAPIP();
  
  // printing the server IP address
  Serial.print("AccessPoint IP : ");
  Serial.println(IP);

  // starting server
  TCP_SERVER.begin();                                                 // which means basically WiFiServer(TCPPort);
  
  Serial.println("Server Started");
}

//====================================================================================

void HandleClients(){
unsigned long tNow;
       
  if(TCP_SERVER.hasClient()){
    WiFiClient TCP_Client = TCP_SERVER.available();
    TCP_Client.setNoDelay(1);                                          // enable fast communication
    while(1){
      //---------------------------------------------------------------
      // If clients are connected
      //---------------------------------------------------------------
      if(TCP_Client.available()){
        // read the message
        String Message = TCP_Client.readStringUntil('\r');
          
        // print the message on the screen
        Serial.print("Received packet of size ");
        Serial.println(sizeof(Message));
          
        // print who sent it
        Serial.print("From ");
        Serial.print(TCP_Client.remoteIP());
        Serial.print(", port ");
        Serial.println(TCP_Client.remotePort());

        // content
        Serial.print("Content: ");
        Serial.println(Message);

        // generate a response - current run-time -> to identify the speed of the response
        tNow=millis();
        dtostrf(tNow, 8, 0, result);
          
        // reply to the client with a message     
        TCP_Client.println(result);                             // important to use println instead of print, as we are looking for a '\r' at the client
        TCP_Client.flush();
      }
       
      //---------------------------------------------------------------
      // If clients are disconnected                                            // does not realy work....
      //---------------------------------------------------------------     
      if(!TCP_Client || !TCP_Client.connected()){
        // Here We Turn Off The LED To Indicated The Its Disconnectted
        digitalWrite(LED0, LOW);
        break;
      }
      
    }   
  }
  else{
    // the LED blinks if no clients are available
    digitalWrite(LED0, HIGH);
    delay(250);
    digitalWrite(LED0, LOW);
    delay(250);
  }
}

am getting "yourSSIDHere" when i scan for the network on my phone and pc which is not defined in the code.

code for client

  #include <ESP8266WiFi.h>    // The Basic Function Of The ESP NOD MCU

//------------------------------------------------------------------------------------
  // Define I/O Pins
  #define       LED0      2       // WIFI Module LED

//------------------------------------------------------------------------------------
  // Authentication Variables
  char*         ssid;            // Wifi Name
  char*         password;        // Wifi Password
  const String  Devicename = "Device_1";

//------------------------------------------------------------------------------------
  // WIFI Module Role & Port
  IPAddress     TCP_Server(192, 168, 4, 1);
  IPAddress     TCP_Gateway(192, 168, 4, 1);
  IPAddress     TCP_Subnet(255, 255, 255, 0);

  unsigned int  TCPPort = 2390;

  WiFiClient    TCP_Client;

//------------------------------------------------------------------------------------
  // Some Variables
  unsigned char buffer[80];
  char result[10];

//====================================================================================

void setup(){
  // setting the serial port ----------------------------------------------
  Serial.begin(115200);  
  
  // setting the mode of pins ---------------------------------------------
  pinMode(LED0, OUTPUT);                          // WIFI OnBoard LED Light
  digitalWrite(LED0, !LOW);                       // Turn WiFi LED Off
  
  // WiFi Connect ----------------------------------------------------
  Check_WiFi_and_Connect_or_Reconnect();          // Checking For Connection
}

//====================================================================================
 
void loop(){

  Send_Request_To_Server();

}

//====================================================================================

void Send_Request_To_Server() {
unsigned long tNow;
    
  tNow=millis();
  dtostrf(tNow, 8, 0, result);                            // create a char[] out of the tNow

  TCP_Client.println(result);                             // Send Data

  while(1){
    int len = TCP_Client.available();                     // Check For Reply   
    if (len > 0) {
      if (len > 80){ 
        len = 80;
      }
      String line = TCP_Client.readStringUntil('\r');     // if '\r' is found
      Serial.print("received: ");                         // print the content
      Serial.println(line);
      break;                                              // exit
    }
    if((millis()-tNow)>1000){                             // if more then 1 Second No Reply -> exit
      Serial.println("timeout");
      break;                                              // exit
    }
  }                        

  TCP_Client.flush();                                     // Empty Bufffer 
  Check_WiFi_and_Connect_or_Reconnect();
}

//====================================================================================

void Check_WiFi_and_Connect_or_Reconnect(){
  if (WiFi.status() != WL_CONNECTED){
 
    TCP_Client.stop();                                  //Make Sure Everything Is Reset
    WiFi.disconnect();
    Serial.println("Not Connected...trying to connect...");
    delay(50);
    WiFi.mode(WIFI_STA);                                // station (Client) Only - to avoid broadcasting an SSID ??
    WiFi.begin("DataTransfer");                         // the SSID that we want to connect to
   
    while(WiFi.status() != WL_CONNECTED){
      for(int i=0; i < 10; i++){
        digitalWrite(LED0, !HIGH);
        delay(250);
        digitalWrite(LED0, !LOW);
        delay(250);
        Serial.print(".");
      }
      Serial.println("");
    }
  // stop blinking to indicate if connected -------------------------------
    digitalWrite(LED0, !HIGH);
    Serial.println("!-- Client Device Connected --!");

  // Printing IP Address --------------------------------------------------
    Serial.println("Connected To      : " + String(WiFi.SSID()));
    Serial.println("Signal Strenght   : " + String(WiFi.RSSI()) + " dBm");
    Serial.print  ("Server IP Address : ");
    Serial.println(TCP_Server);
    Serial.print  ("Device IP Address : ");
    Serial.println(WiFi.localIP());
 
  // conecting as a client -------------------------------------
    Tell_Server_we_are_there();
  }
}

//====================================================================================

void Tell_Server_we_are_there(){
  // first make sure you got disconnected
  TCP_Client.stop();

  // if sucessfully connected send connection message
  if(TCP_Client.connect(TCP_Server, TCPPort)){
    Serial.println    ("<" + Devicename + "-CONNECTED>");
    TCP_Client.println ("<" + Devicename + "-CONNECTED>");
  }
  TCP_Client.setNoDelay(1);                                     // allow fast communication?
}

//====================================================================================

PS Both code are working perfect between 2 esp8266 .

[hazee007]

I tried using the insert code
dont know why it give the code like that.

[everslick]

it is three ticks ``` before and after the snipped!

[hazee007]

it is three ticks ``` before and after the snipped!

Thanks Man... Still Looking for solutions tho

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