my client INO
//-- Libraries Included --------------------------------------------------------------
#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(57600);
// 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?
}
//====================================================================================
