Control LED using ESP8266 Wifi module and iPhone/Android | W

1#include <SoftwareSerial.h>
2
3#define DEBUG true
4
5SoftwareSerial  esp8266(2,3); // make TX Arduino line is pin 2, make RX Arduino line is pin 3.
6
7boolean  alreadyConnected = false;
8
9// This means that you need to connect the TX line  from the esp to the Arduino's pin 2
10                             // and the RX  line from the esp to the Arduino's pin 3
11void setup()
12{
13
14  Serial.begin(9600);
15  esp8266.begin(9600); // your esp's baud rate might be different
16  
17  pinMode(6,OUTPUT);
18  digitalWrite(6,LOW);
19  
20  pinMode(7,OUTPUT);
21  digitalWrite(7,LOW);
22
23  sendData("AT+RST\
\
24",2000,DEBUG); // reset module
25  sendData("AT+CWMODE=2\
\
26",1000,DEBUG);  // configure as access point
27  sendData("AT+CIFSR\
\
28",1000,DEBUG); // get  ip address
29  sendData("AT+CIPMUX=1\
\
30",1000,DEBUG); // configure for multiple  connections
31  sendData("AT+CIPSERVER=1,80\
\
32",1000,DEBUG); // turn on server  on port 80
33
34}
35
36void loop()
37{
38
39  String inString = "";  
40  if(esp8266.available()) // check if the esp is sending a message 
41  {
42   if  (!alreadyConnected) {
43      // clear out the input buffer:
44    esp8266.flush();
45    Serial.println("We have a new client");
46    esp8266.println("Hello, client!");
47    alreadyConnected = true;
48  }
49
50  if(esp8266.find("+IPD,"))
51  {
52     delay(10); // wait for the serial buffer to fill up (read all the serial data)
53
54    int pinNumber = 0;
55    String tempS = "";
56    esp8266.find("pin=");  // advance cursor to "pin="
57    char temp = esp8266.read();
58    tempS =  temp;
59     
60    pinNumber = tempS.toInt();
61    Serial.println(pinNumber);
62    digitalWrite(pinNumber, !digitalRead(pinNumber)); // toggle pin    
63
64   }
65 }
66 
67}
68
69
70/*
71* Name: sendData
72* Description: Function  used to send data to ESP8266.
73* Params: command - the data/command to send; timeout  - the time to wait for a response; debug - print to Serial window?(true = yes, false  = no)
74* Returns: The response from the esp8266 (if there is a reponse)
75*/
76String  sendData(String command, const int timeout, boolean debug)
77{
78  String response  = "";
79
80    esp8266.print(command); // send the read character to the esp8266
81    
82    long int time = millis();
83    
84    while( (time+timeout) > millis())
85    {
86      while(esp8266.available())
87      {
88
89        // The esp has  data so display its output to the serial window 
90        char c = esp8266.read();  // read the next character.
91        response+=c;
92      }  
93    }
94    
95    if(debug)
96    {
97      Serial.print(response);
98    }
99    
100    return  response;
101  }