Introducing or getting started to ESP32

1/* WiFi Web Server LED Blink */
2
3#include <WiFi.h>
4
5const char* ssid     = "Your wifi ssid";     // Enter SSID name of your wifi router
6const char* password = "your wifi password";    // Enter password of your wifi router
7
8WiFiServer server(80);
9
10void setup()
11{
12    Serial.begin(115200);
13    pinMode(2, OUTPUT);      // set the LED pin mode
14
15    delay(10);
16
17    // We start by connecting to a WiFi network
18
19    Serial.println();
20    Serial.println();
21    Serial.print("Connecting to ");
22    Serial.println(ssid);
23
24    WiFi.begin(ssid, password);
25
26    while (WiFi.status() != WL_CONNECTED) {
27        delay(500);
28        Serial.print(".");
29    }
30
31    Serial.println("");
32    Serial.println("WiFi connected.");
33    Serial.println("IP address: ");
34    Serial.println(WiFi.localIP());
35    
36    server.begin();
37
38}
39
40void loop(){
41 WiFiClient client = server.available();   // listen for incoming clients
42
43  if (client) {                             // if you get a client,
44    Serial.println("New Client.");           // print a message out the serial port
45    String currentLine = "";                // make a String to hold incoming data from the client
46    while (client.connected()) {            // loop while the client's connected
47      if (client.available()) {             // if there's bytes to read from the client,
48        char c = client.read();             // read a byte, then
49        Serial.write(c);                    // print it out the serial monitor
50        if (c == '\n') {                    // if the byte is a newline character
51
52          // if the current line is blank, you got two newline characters in a row.
53          // that's the end of the client HTTP request, so send a response:
54          if (currentLine.length() == 0) {
55            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
56            // and a content-type so the client knows what's coming, then a blank line:
57            client.println("HTTP/1.1 200 OK");
58            client.println("Content-type:text/html");
59            client.println();
60
61            // the content of the HTTP response follows the header:
62            client.print("Click <a href=\"/H\">here</a> to turn the LED on pin 2 on.<br>");
63            client.print("Click <a href=\"/L\">here</a> to turn the LED on pin 2 off.<br>");
64
65            // The HTTP response ends with another blank line:
66            client.println();
67            // break out of the while loop:
68            break;
69          } else {    // if you got a newline, then clear currentLine:
70            currentLine = "";
71          }
72        } else if (c != '\r') {  // if you got anything else but a carriage return character,
73          currentLine += c;      // add it to the end of the currentLine
74        }
75
76        // Check to see if the client request was "GET /H" or "GET /L":
77        if (currentLine.endsWith("GET /H")) {
78          digitalWrite(2, HIGH);               // GET /H turns the LED on
79        }
80        if (currentLine.endsWith("GET /L")) {
81          digitalWrite(2, LOW);                // GET /L turns the LED off
82        }
83      }
84    }
85    // close the connection:
86    client.stop();
87    Serial.println("Client Disconnected.");
88  }
89}

1//* Turn LED ON or OFF from your phone 
2 //* Using ESP32's Bluetooth and Mobile app
3 //* turn ON and OFF LED
4
5
6//This example creates a bridge between Serial and Classical Bluetooth (SPP)
7//and also demonstrate that SerialBT have the same functionalities of a normal Serial
8
9#include "BluetoothSerial.h"
10
11#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
12#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
13#endif
14
15BluetoothSerial SerialBT;
16int received;// received value will be stored in this variable
17char receivedChar;// received value will be stored as CHAR in this variable
18
19const char turnON ='H';
20const char turnOFF ='L';
21const int LEDpin = 2;
22
23void setup() {
24  Serial.begin(115200);
25  SerialBT.begin("ESP32_BLUETOOTH_LED"); //Bluetooth device name
26  Serial.println("The device started, now you can pair it with bluetooth!");
27  Serial.println("To turn ON send: H");//print on serial monitor  
28  Serial.println("To turn OFF send: L"); //print on serial monitor 
29  pinMode(LEDpin, OUTPUT);
30 
31}
32
33void loop() {
34    receivedChar =(char)SerialBT.read();
35
36  if (Serial.available()) {
37    SerialBT.write(Serial.read());
38  
39  }
40  if (SerialBT.available()) {
41    
42    SerialBT.print("Received:");// write on BT app
43    SerialBT.println(receivedChar);// write on BT app      
44    Serial.print ("Received:");//print on serial monitor
45    Serial.println(receivedChar);//print on serial monitor    
46    //SerialBT.println(receivedChar);//print on the app    
47    //SerialBT.write(receivedChar); //print on serial monitor
48    if(receivedChar == turnON)
49    {
50     SerialBT.println("LED ON:");// write on BT app
51     Serial.println("LED ON:");//write on serial monitor
52     digitalWrite(LEDpin, HIGH);// turn the LED ON
53       
54    }
55    if(receivedChar == turnOFF)
56    {
57     SerialBT.println("LED OFF:");// write on BT app
58     Serial.println("LED OFF:");//write on serial monitor
59      digitalWrite(LEDpin, LOW);// turn the LED off 
60    }    
61     
62  
63
64  }
65  delay(20);
66}