tcp/tcp_client/tcp_client.ino

#include <WiFi.h>
const char* ssid     = "yourssid";
const char* password = "12345678";
const char* host = "192.168.4.1";
WiFiClient client;
uint16_t port = 9100;
uint8_t temp;
uint8_t buffer[512];
void taskConnectHost(void *param);
void taskReceive(void *parm);
void setup()
{
    Serial.begin(921600);
    delay(10);
    // We start by connecting to a 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());

    xTaskCreate(taskConnectHost,"taskConnectHost",2048,NULL,1,NULL);
    xTaskCreate(taskReceive,"taskReceive",2048,NULL,1,NULL);
}

void loop()
{

}
////////////////////////////////////////////////////////////
//
void taskConnectHost(void *param){
    Serial.println("taskConnectHost created...");
    for(;;){
        if(!client.connected()){
            Serial.println("connecting to ");
            Serial.printf("%s %d\n",host,port);
            client.connect(host, port);
        }
        vTaskDelay(1000 / portTICK_PERIOD_MS);
    }
}
///////////////////////////////////////////
//
void taskReceive(void *parm){
    vTaskDelay(10 / portTICK_PERIOD_MS);
    Serial.println("taskReceive created...");
    for(;;){
    if (client.connected()) {
        while (client.available() != 0) {
            if (client.available()<=512){
                int cnt = client.available();
                client.read(buffer,cnt);
                Serial.write(buffer,cnt);
            }else{
                client.read(buffer,512);
                Serial.write(buffer,512);
            }
        }
    }
  }
}