ESP8266 Community Forum

- Fri Apr 01, 2016 12:42 pm #44635 Hi, I want to send data between two Teensy3.2 over Wifi (using a router) using ESP8266. I am testing the following code but it is not working, can you please suggest me what is wrong here?

Server

Code: Select all#include <ESP8266_TCP.h>

// ESP8266 Class
ESP8266_TCP wifi;

// Target Access Point
#define ssid         "AirCard-3D52"
#define pass         "52836427"

// Connect this pin to CH_PD pin on ESP8266
#define PIN_RESET    8

void setup()
{
  delay(3000);
 
  // We use Serial1 to interface with ESP8266
  // and use Serial to debugging
  Serial.begin(9600);
  Serial1.begin(115200);
  wifi.begin(&Serial1, &Serial, PIN_RESET);
  // Check that ESP8266 is available
  if(wifi.test())
  {
  // Connect to target Access Point
    String ip = connectAP();
  // Open TCP Server on port 2000 and 30 seconds for connection timeout (Max 2880)
    wifi.openTCPServer(2000, 30);
  }
  else
  {
  // ESP8266 isn't available
    Serial.println("Check module connection and restart to try again...");
    while(true);
  }
}

void loop()
{ 
  // Check for any data has coming to ESP8266
  int dataState = wifi.isNewDataComing(WIFI_SERVER);
  if(dataState != WIFI_NEW_NONE) {
    if(dataState == WIFI_NEW_CONNECTED) {
    // Connected with TCP Client Side
      Serial.println("Status : Connected");
    } else if(dataState == WIFI_NEW_DISCONNECTED) {
    // Disconnected from TCP Client Side
      Serial.println("Status : Disconnected");
    } else if(dataState == WIFI_NEW_MESSAGE) {
    // Got a message from TCP Client Side
      digitalWrite(13,HIGH);
      Serial.println("ID : " + String(wifi.getId()));
      Serial.println("Message : " + wifi.getMessage());
      wifi.closeTCPConnection(0);
    } else if(dataState == WIFI_NEW_SEND_OK) {
    // Message transfer has successful
      Serial.println("SENT!!!!");
    }
  }
}

// Access Point Connection Function that you can loop connect to Access Point until successful
String connectAP()
{
  String ip = "0.0.0.0";
  while(ip.equals("0.0.0.0"))
  {
    ip = wifi.connectAccessPoint(ssid, pass);
    if(!ip.equals("0.0.0.0"))
    {
      break;
    }
  }
  return ip;
}

Client Side

Code: Select all#include <ESP8266_TCP.h>

// ESP8266 Class
ESP8266_TCP wifi;

// Target Access Point
#define ssid         "AirCard-3D52"
#define pass         "52836427"

// TCP Server IP and port
#define serverIP    "192.168.1.3"
#define serverPort  2000

// Connect this pin to CH_PD pin on ESP8266
#define PIN_RESET    6

// Pin that connected to button to send any message
#define PIN_SEND     22

void setup()
{
  delay(3000);
 
  // Set pin for send command to input mode
  pinMode(PIN_SEND, INPUT);
 
 
  // We use Serial1 to interface with ESP8266
  // and use Serial to debugging
  Serial.begin(9600);
  Serial1.begin(115200);
  wifi.begin(&Serial1, &Serial, PIN_RESET);
 
  // Check that ESP8266 is available
  if(wifi.test())
  {
  // Connect to target Access Point
    String ip = connectAP();
    delay(1000);
  }
  else
  {
  // ESP8266 isn't available
    Serial.println("Check module connection and restart to try again...");
    while(true);
  }
}

void loop()
{
  // Check for any data has coming to ESP8266
  int dataState = wifi.isNewDataComing(WIFI_CLIENT);
  if(dataState != WIFI_NEW_NONE)
  {
    Serial.println("Inside If");
    Serial.println(dataState);
   
    if(dataState == WIFI_NEW_CONNECTED) {
    // Connected with TCP Server Side
    // Send a message to TCP Server Side
      Serial.println("Sending");
      wifi.send("12345678");
    } else if(dataState == WIFI_NEW_DISCONNECTED) {
    // Disconnected from TCP Server Side
      Serial.println("Disconnected");
    } else if(dataState == WIFI_NEW_SEND_OK) {
    // Message transfer has successfully
      Serial.println("SENT!!!!");
    } else if(dataState == WIFI_NEW_ALREADY_CONNECT) {
    // Already connected with TCP Server Side
      Serial.println("Already Connect!!");
    }
  }
 
  // When button for connect to TCP Server Side was pressed
  //if(digitalRead(PIN_SEND)>500) {
    // Send message to TCP Server Side and waiting for 1 sec
    Serial.println("Connect!!");
    wifi.connectTCP(serverIP, serverPort);
    delay(1000);
  //}
 
  delay(50);
}

// Access Point Connection Function that you can loop connect to Access Point until successful
String connectAP()
{
  String ip = "0.0.0.0";
  while(ip.equals("0.0.0.0"))
  {
    ip = wifi.connectAccessPoint(ssid, pass);
    if(!ip.equals("0.0.0.0"))
    {
      break;
    }
  }
  return ip;
}