WiFi Doorbell with ESP32 and DFPlayer

1/*
2 * Sources:
3 * https://www.arduino.cc/en/Tutorial/Button
4  * https://techtutorialsx.com/2017/05/19/esp32-http-get-requests/
5 */
6
7#include  <WiFi.h>
8#include <HTTPClient.h>
9 
10const char* ssid     = "WiFi SSID";
11const  char* password = "WiFi password";
12const char* bellUrl = "http://192.168.1.149/bell/on";
13
14const  int buttonPin = 21;    // the number of the pushbutton pin
15const int ledPin =  23;      // the number of the LED pin
16int buttonState = 0;
17
18 
19void  setup() {
20
21  Serial.begin(115200);
22  btStop(); // turn off bluetooth
23
24  pinMode(ledPin, OUTPUT);
25  pinMode(buttonPin, INPUT);
26
27  connectWifi();
28
29}
30  
31void loop() {
32 
33  if ((WiFi.status() == WL_CONNECTED)) {
34
35    buttonState  = digitalRead(buttonPin);
36    delay(100);
37
38    if (buttonState == HIGH)  {
39      digitalWrite(ledPin, HIGH);
40      
41      HTTPClient http;
42   
43      http.begin(bellUrl);
44      Serial.print("GET ");
45      Serial.println(bellUrl);
46      int httpCode = http.GET();
47   
48      if (httpCode > 0) {
49          //String  payload = http.getString();
50          Serial.println(httpCode);
51          //Serial.println(payload);
52        }
53      else {
54        Serial.println("Error on HTTP request");
55      }
56   
57      http.end();
58      delay(200);
59    }
60    else {
61      digitalWrite(ledPin, LOW); 
62    }
63  }
64  else {
65    Serial.println("WiFi  not connected!");
66    digitalWrite(ledPin, HIGH);
67    delay(200);
68    digitalWrite(ledPin,  LOW);
69    delay(50);
70    digitalWrite(ledPin, HIGH);
71    delay(200);
72    digitalWrite(ledPin, LOW);
73    connectWifi();
74  }
75 
76}
77
78void  connectWifi() {
79  boolean ledStatus = false;
80  Serial.print("Connecting to  ");
81  Serial.println(ssid);
82  WiFi.begin(ssid, password);
83  while (WiFi.status()  != WL_CONNECTED) {
84    delay(500);
85    Serial.print(".");
86    ledStatus  = !ledStatus;
87    digitalWrite(ledPin, ledStatus);
88  }
89 
90  Serial.println("WiFi  connected.");
91  Serial.println("IP address: ");
92  Serial.println(WiFi.localIP());
93}
94
95

1/*
2Sources:
3https://www.youtube.com/watch?v=kq2RLz65_w0
4https://www.dfrobot.com/wiki/index.php/DFPlayer_Mini_SKU:DFR0299
5https://github.com/pcbreflux/espressif/blob/master/esp32/arduino/sketchbook/ESP32_DFPlayer_full/ESP32_DFPlayer_full.ino
6https://github.com/pcbreflux/espressif/blob/master/esp32/arduino/sketchbook/ESP32_DFPlayer_full/setup.png
7https://randomnerdtutorials.com/esp32-web-server-arduino-ide/
8*/
9
10#include   <Arduino.h>
11#include "DFRobotDFPlayerMini.h"
12#include <WiFi.h>
13
14HardwareSerial   hwSerial(1);
15DFRobotDFPlayerMini dfPlayer;
16int volume = 5;
17
18const char*   ssid     = "WiFi SSID";
19const char* password = "WiFi password";
20WiFiServer   server(80); // Set web server port number to 80
21
22String header;
23String   ledState = "";
24const int ledPin = 26;
25
26unsigned long timestamp = 0;
27
28
29void   setup()
30{
31  btStop(); // turn off bluetooth
32  hwSerial.begin(9600, SERIAL_8N1,   18, 19);  // speed, type, TX, RX
33  Serial.begin(115200);
34
35// WiFi & LED   ==================================================================
36  pinMode(ledPin,   OUTPUT);
37  digitalWrite(ledPin, LOW);
38
39  // Connect to Wi-Fi network with   SSID and password
40  Serial.print("Connecting to ");
41  Serial.println(ssid);
42   WiFi.begin(ssid, password);
43  while (WiFi.status() != WL_CONNECTED) {
44    delay(500);
45     Serial.print(".");
46  }
47  // Print local IP address and start web server
48   Serial.println("");
49  Serial.println("WiFi connected.");
50  Serial.println("IP   address: ");
51  Serial.println(WiFi.localIP());
52  server.begin();
53  delay(500);
54
55   dfPlayer.begin(hwSerial);  //Use softwareSerial to communicate with mp3
56  dfPlayer.setTimeOut(500);   //Set serial communication time out 500ms
57  dfPlayer.volume(volume);  //Set volume   value (0~30).
58  dfPlayer.EQ(DFPLAYER_EQ_NORMAL);
59  dfPlayer.outputDevice(DFPLAYER_DEVICE_SD);
60   
61  ledState = "on";
62  digitalWrite(ledPin, HIGH);
63  timestamp = millis();
64   dfPlayer.play(1);  //Play the first mp3
65
66}
67
68void loop() {
69
70   WiFiClient client = server.available();   // Listen for incoming clients
71
72   if (ledState == "on" && (millis() - timestamp) > 2000) {
73    ledState = "off";
74     digitalWrite(ledPin, LOW);
75  }
76
77  if (client) {
78    String currentLine   = "";                // make a String to hold incoming data from the client
79     while (client.connected()) {            // loop while the client's connected
80       if (client.available()) {             // if there's bytes to read from the   client,
81        char c = client.read();             // read a byte, then
82         Serial.write(c);                    // print it out the serial monitor
83         header += c;
84        if (c == '\
85') {                    // if the byte   is a newline character
86          // if the current line is blank, you got two   newline characters in a row.
87          // that's the end of the client HTTP request,   so send a response:
88          if (currentLine.length() == 0) {
89            //   HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
90            //   and a content-type so the client knows what's coming, then a blank line:
91            client.println("HTTP/1.1   200 OK");
92            client.println("Content-type:text/html");
93            client.println("Connection:   close");
94            client.println();
95            
96            // turns   the GPIOs on and off
97            if (header.indexOf("GET /bell/on") >= 0) {
98               ledState = "on";
99              digitalWrite(ledPin, HIGH);
100               timestamp = millis();
101              dfPlayer.play(1);  //Play the   first mp3
102            }
103            else  if (header.indexOf("GET /volume/")   >= 0) { // yes, I know this is not RESTful
104              String str1 = header;
105               str1 = str1.substring(header.indexOf("GET /volume/") + 12);
106               volume = str1.substring(0, str1.indexOf(" ")).toInt();
107              
108               if (volume < 0) {
109                volume = 0;
110              }
111               else if (volume > 30) {
112                volume = 30;
113              }
114               
115              dfPlayer.volume(volume);
116              Serial.print("volume   set to ");
117              Serial.println(volume);
118            }
119            
120             // Display the HTML web page
121            client.println("<!DOCTYPE   html><html>");
122            client.println("<head><meta name=\\"viewport\\"   content=\\"width=device-width, initial-scale=1\\">");
123            client.println("<link   rel=\\"icon\\" href=\\"data:,\\">");
124            client.println("<style>html   { font-family: sans-serif; display: inline-block; margin: 0px auto; text-align:   center; }");
125            client.println(".button { background-color: #4CAF50;   border: none; color: white; padding: 16px 40px; text-decoration: none; font-size:   30px; margin: 2px; cursor: pointer;}");
126            client.println(".button2   { background-color: #4CAF50; border: none; color: white; padding: 4px 10px; text-decoration:   none; margin: 1px; cursor: pointer;}</style></head>");
127            
128            client.println("<body><h1>LeWe   T&uuml;rklingel</h1>");
129            client.println("<p>Volume: <a href=\\"/volume/"   + String(volume-1) + "\\"><button class=\\"button2\\">&minus;</button></a> "   + String(volume) + " <a href=\\"/volume/" + String(volume+1) + "\\"><button   class=\\"button2\\">&plus;</button></a></p>");
130            client.println("<p><a   href=\\"/bell/on\\"><button class=\\"button\\">Klingeln</button></a></p>");
131             client.println("<p style='margin-top: 40px; font-size: 8px;'>dfplayer   status: " + printDetail(dfPlayer.readType(), dfPlayer.read()) + "</p>");
132             client.println("<p style='font-size: 8px;'>LED - State " + ledState   + "</p>");
133            client.println("</body></html>");
134            
135             // The HTTP response ends with another blank line
136            client.println();
137             
138            // Break out of the while loop
139            break;
140           } else { // if you got a newline, then clear currentLine
141            currentLine   = "";
142          }
143        } else if (c != '\
') {  // if you got anything   else but a carriage return character,
144          currentLine += c;      // add   it to the end of the currentLine
145        }
146      }
147    }
148    // Clear   the header variable
149    header = "";
150    // Close the connection
151    client.stop();
152     Serial.println("Client disconnected.");
153    Serial.println("");
154  }
155}
156
157String   printDetail(uint8_t type, int value){
158  switch (type) {
159    case TimeOut:
160       return "Time Out!";
161      break;
162    case WrongStack:
163      return   "Stack Wrong!";
164      break;
165    case DFPlayerCardInserted:
166      return   "Card Inserted!";
167      break;
168    case DFPlayerCardRemoved:
169      return   "Card Removed!";
170      break;
171    case DFPlayerCardOnline:
172      return   "Card Online!";
173      break;
174    case DFPlayerPlayFinished:
175      return   "Play Finished!";
176      break;
177    case DFPlayerError:
178      switch (value)   {
179        case Busy:
180          return "Error: Card not found";
181          break;
182         case Sleeping:
183          return "Error: Sleeping";
184          break;
185         case SerialWrongStack:
186          return "Error: Get Wrong Stack";
187           break;
188        case CheckSumNotMatch:
189          return "Error:   Check Sum Not Match";
190          break;
191        case FileIndexOut:
192          return   "Error: File Index Out of Bound";
193          break;
194        case FileMismatch:
195           return "Error: Cannot Find File";
196          break;
197        case   Advertise:
198          return "Error: In Advertise";
199          break;
200         default:
201          break;
202      }
203      break;
204    default:
205       break;
206  }
207}
208
209

1/*
2Sources:
3https://www.youtube.com/watch?v=kq2RLz65_w0
4https://www.dfrobot.com/wiki/index.php/DFPlayer_Mini_SKU:DFR0299
5https://github.com/pcbreflux/espressif/blob/master/esp32/arduino/sketchbook/ESP32_DFPlayer_full/ESP32_DFPlayer_full.ino
6https://github.com/pcbreflux/espressif/blob/master/esp32/arduino/sketchbook/ESP32_DFPlayer_full/setup.png
7https://randomnerdtutorials.com/esp32-web-server-arduino-ide/
8*/
9
10#include  <Arduino.h>
11#include "DFRobotDFPlayerMini.h"
12#include <WiFi.h>
13
14HardwareSerial  hwSerial(1);
15DFRobotDFPlayerMini dfPlayer;
16int volume = 5;
17
18const char*  ssid     = "WiFi SSID";
19const char* password = "WiFi password";
20WiFiServer  server(80); // Set web server port number to 80
21
22String header;
23String  ledState = "";
24const int ledPin = 26;
25
26unsigned long timestamp = 0;
27
28
29void  setup()
30{
31  btStop(); // turn off bluetooth
32  hwSerial.begin(9600, SERIAL_8N1,  18, 19);  // speed, type, TX, RX
33  Serial.begin(115200);
34
35// WiFi & LED  ==================================================================
36  pinMode(ledPin,  OUTPUT);
37  digitalWrite(ledPin, LOW);
38
39  // Connect to Wi-Fi network with  SSID and password
40  Serial.print("Connecting to ");
41  Serial.println(ssid);
42  WiFi.begin(ssid, password);
43  while (WiFi.status() != WL_CONNECTED) {
44    delay(500);
45    Serial.print(".");
46  }
47  // Print local IP address and start web server
48  Serial.println("");
49  Serial.println("WiFi connected.");
50  Serial.println("IP  address: ");
51  Serial.println(WiFi.localIP());
52  server.begin();
53  delay(500);
54
55  dfPlayer.begin(hwSerial);  //Use softwareSerial to communicate with mp3
56  dfPlayer.setTimeOut(500);  //Set serial communication time out 500ms
57  dfPlayer.volume(volume);  //Set volume  value (0~30).
58  dfPlayer.EQ(DFPLAYER_EQ_NORMAL);
59  dfPlayer.outputDevice(DFPLAYER_DEVICE_SD);
60  
61  ledState = "on";
62  digitalWrite(ledPin, HIGH);
63  timestamp = millis();
64  dfPlayer.play(1);  //Play the first mp3
65
66}
67
68void loop() {
69
70  WiFiClient client = server.available();   // Listen for incoming clients
71
72  if (ledState == "on" && (millis() - timestamp) > 2000) {
73    ledState = "off";
74    digitalWrite(ledPin, LOW);
75  }
76
77  if (client) {
78    String currentLine  = "";                // make a String to hold incoming data from the client
79    while (client.connected()) {            // loop while the client's connected
80      if (client.available()) {             // if there's bytes to read from the  client,
81        char c = client.read();             // read a byte, then
82        Serial.write(c);                    // print it out the serial monitor
83        header += c;
84        if (c == '\n') {                    // if the byte  is a newline character
85          // if the current line is blank, you got two  newline characters in a row.
86          // that's the end of the client HTTP request,  so send a response:
87          if (currentLine.length() == 0) {
88            //  HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
89            //  and a content-type so the client knows what's coming, then a blank line:
90            client.println("HTTP/1.1  200 OK");
91            client.println("Content-type:text/html");
92            client.println("Connection:  close");
93            client.println();
94            
95            // turns  the GPIOs on and off
96            if (header.indexOf("GET /bell/on") >= 0) {
97              ledState = "on";
98              digitalWrite(ledPin, HIGH);
99              timestamp = millis();
100              dfPlayer.play(1);  //Play the  first mp3
101            }
102            else  if (header.indexOf("GET /volume/")  >= 0) { // yes, I know this is not RESTful
103              String str1 = header;
104              str1 = str1.substring(header.indexOf("GET /volume/") + 12);
105              volume = str1.substring(0, str1.indexOf(" ")).toInt();
106              
107              if (volume < 0) {
108                volume = 0;
109              }
110              else if (volume > 30) {
111                volume = 30;
112              }
113              
114              dfPlayer.volume(volume);
115              Serial.print("volume  set to ");
116              Serial.println(volume);
117            }
118            
119            // Display the HTML web page
120            client.println("<!DOCTYPE  html><html>");
121            client.println("<head><meta name=\\"viewport\\"  content=\\"width=device-width, initial-scale=1\\">");
122            client.println("<link  rel=\\"icon\\" href=\\"data:,\\">");
123            client.println("<style>html  { font-family: sans-serif; display: inline-block; margin: 0px auto; text-align:  center; }");
124            client.println(".button { background-color: #4CAF50;  border: none; color: white; padding: 16px 40px; text-decoration: none; font-size:  30px; margin: 2px; cursor: pointer;}");
125            client.println(".button2  { background-color: #4CAF50; border: none; color: white; padding: 4px 10px; text-decoration:  none; margin: 1px; cursor: pointer;}</style></head>");
126            
127            client.println("<body><h1>LeWe  T&uuml;rklingel</h1>");
128            client.println("<p>Volume: <a href=\\"/volume/"  + String(volume-1) + "\\"><button class=\\"button2\\">&minus;</button></a> "  + String(volume) + " <a href=\\"/volume/" + String(volume+1) + "\\"><button  class=\\"button2\\">&plus;</button></a></p>");
129            client.println("<p><a  href=\\"/bell/on\\"><button class=\\"button\\">Klingeln</button></a></p>");
130            client.println("<p style='margin-top: 40px; font-size: 8px;'>dfplayer  status: " + printDetail(dfPlayer.readType(), dfPlayer.read()) + "</p>");
131            client.println("<p style='font-size: 8px;'>LED - State " + ledState  + "</p>");
132            client.println("</body></html>");
133            
134            // The HTTP response ends with another blank line
135            client.println();
136            
137            // Break out of the while loop
138            break;
139          } else { // if you got a newline, then clear currentLine
140            currentLine  = "";
141          }
142        } else if (c != '\r') {  // if you got anything  else but a carriage return character,
143          currentLine += c;      // add  it to the end of the currentLine
144        }
145      }
146    }
147    // Clear  the header variable
148    header = "";
149    // Close the connection
150    client.stop();
151    Serial.println("Client disconnected.");
152    Serial.println("");
153  }
154}
155
156String  printDetail(uint8_t type, int value){
157  switch (type) {
158    case TimeOut:
159      return "Time Out!";
160      break;
161    case WrongStack:
162      return  "Stack Wrong!";
163      break;
164    case DFPlayerCardInserted:
165      return  "Card Inserted!";
166      break;
167    case DFPlayerCardRemoved:
168      return  "Card Removed!";
169      break;
170    case DFPlayerCardOnline:
171      return  "Card Online!";
172      break;
173    case DFPlayerPlayFinished:
174      return  "Play Finished!";
175      break;
176    case DFPlayerError:
177      switch (value)  {
178        case Busy:
179          return "Error: Card not found";
180          break;
181        case Sleeping:
182          return "Error: Sleeping";
183          break;
184        case SerialWrongStack:
185          return "Error: Get Wrong Stack";
186          break;
187        case CheckSumNotMatch:
188          return "Error:  Check Sum Not Match";
189          break;
190        case FileIndexOut:
191          return  "Error: File Index Out of Bound";
192          break;
193        case FileMismatch:
194          return "Error: Cannot Find File";
195          break;
196        case  Advertise:
197          return "Error: In Advertise";
198          break;
199        default:
200          break;
201      }
202      break;
203    default:
204      break;
205  }
206}
207
208