ESP32 Forum

Code: Select all

WiFiServer server(23);
WiFiClient serverClient;

void setup() {
    Serial.begin(115200);
    delay(5000);
    Serial.println("\nConnecting");

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

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

    //start UART and the server
    Serial2.begin(57600);
    server.begin();
    server.setNoDelay(true);

    Serial.print("Ready! Use 'telnet ");
    Serial.print(WiFi.localIP());
    Serial.println(" 23' to connect");
}

void loop() {
    //check if there are any new clients
    if (server.hasClient()){
        //find free/disconnected spot
        if (!serverClient || !serverClient.connected()){
            if(serverClient)
                serverClient.stop();

            serverClient = server.available();
            if (!serverClient)
                Serial.println("available broken");
            else {
                server.available().stop();
            }

            Serial.print("New client: ");
            Serial.println(serverClient.remoteIP());
        }
    }

    //check telnet clients for data
    if (serverClient && serverClient.connected()){
        if(serverClient.available()){
            //get data from the telnet client and push it to the UART
            while(serverClient.available())
                Serial2.write(serverClient.read()); // This triggers the Serial2.available() method below
            serverClient.flush();
        }
    }
    else {
        if (serverClient) {
            serverClient.stop();
        }
    }

    //check UART for data
    if(Serial2.available()){
        size_t len = Serial2.available();
        uint8_t sbuf[len];
        Serial2.readBytes(sbuf, len);
        //push UART data to all connected telnet clients
        if (serverClient && serverClient.connected()){
            serverClient.write(sbuf, len);
            delay(1);
            Serial2.flush();
        }
    }
}

Code: Select all

//check telnet clients for data
    if (serverClient && serverClient.connected()){
        Serial.println("COMM"); // <<< HERE
        if(serverClient.available()){
            //get data from the telnet client and push it to the UART
            while(serverClient.available())
                Serial2.write(serverClient.read()); // This triggers the Serial2.available() method below
            serverClient.flush();
        }
    }