Enceintes WiFilles

Wi-Filles est un programme de sensibilisation des jeunes filles aux métiers et aux compétences du numérique. Les jeunes volontaires suivent des ateliers pendant plusieurs mois, les mercredis après-midi, et pendant les vacances scolaires, en partenariat avec de nombreux·euses professionnel·le·s du numérique. Plus d'infos: Avec la promo 2021 des Wi-Filles de la Loire (article sur le blog de Zoomacom)
Un des deux groupes, accompagné au FabLab par Zoomacom en 2021, a choisi de créer une enceinte mp3 (fichiers sur carte SD, pilotable en wifi depuis un smartphone).

Schéma du montage

Valeurs des composants :

Résistance : 220Ω
Condensateur : 1000µF
Haut parleur : 4Ω 3W

Matériel

Nom	Description	Quantité	Prix unitaire	Prix
Lolin NodeMCU v3	Microcontrolleur	1	7€	7€
DFPlayer Mini	Lecteur MP3	1	1€	1€
Enceinte 4Ω 3W	Sortie sonore	1	2€	2€
Ampli Audio	Amplification du signal sonore	1	0.5€	0.5€
Connecteur micro USB	Pour l'alimentation	1	0.2€	0.2€
Chargeur de batterie Li-Ion	Charge de la batterie du système	1	0.2€	0.2€
Batterie Li-Ion 3.7V 18650	Alimentation nomade	1	2.5€	2.5€
LED RGB	Voyant lumineux	1	0.03€	0.03€
Interrupeur	Marche/Arret du système	1	0.75€	0.75€
Convertisseur de tension 3.3V	Alimentation des cartes électroniques	1	1€	1€
Support batterie 18650	Support batterie	1	0.5€	0.5€
Condensateur 1000µF	Filtrage de l'alimentation	1	0.07€	0.07€
Résistance 220Ω	Protection de la LED	1	0.02€	0.02€
			Total	15.77€

Programme Arduino

Paramètrage de la carte :

- Ajouter la bibliothèque des cartes ESP8266 board dans Arduino IDE (http://arduino.esp8266.com/stable/package_esp8266com_index.json)
- Installer le paquet "esp8266 by ESP8266 Community" via le gestionnaire de cartes
- Utiliser la carte nommée "NodeMCU 1.0 (ESP-12E Module)" pendant l'envoi du code

Bibliothèque(s) à installer :

DFPlayerMini_Fast : Disponible dans le gestionnaire de bibliothèques Arduino ou ICI

Code :

Cliquer pour afficher

#include <DFPlayerMini_Fast.h>
#include <ESP8266WiFi.h>
#include <SoftwareSerial.h>

#define SSID "EnceinteWiFille1"
#define PASSWD "wifilles"

DFPlayerMini_Fast mp3Player;
SoftwareSerial softSerial(D2,D3);
WiFiServer server(80);

#define Pin_R D7
#define Pin_G D6
#define Pin_B D5

int vol, song, R, G, B;

void setup() {
	// Init serial lines
	Serial.begin(115200);
	softSerial.begin(9600);
	delay(10);

	WiFi.mode(WIFI_AP);
	WiFi.softAP(SSID, PASSWD);

	// Print IP address
	Serial.print("IP address : ");
	Serial.println(WiFi.softAPIP());

	// Start web server
	server.begin();

	// Start mp3 player
	mp3Player.begin(softSerial);
	vol = mp3Player.currentVolume();
	song = mp3Player.currentSdTrack();

	R = 1023;
	G = 0;
	B = 1023;

	analogWrite(Pin_R, R);
	analogWrite(Pin_G, G);
	analogWrite(Pin_B, B);

}

void loop() {
	// Init connection with client
	WiFiClient client = server.available();
	if(!client) {
		return;
	}

	while(!client.available()) {
		delay(1);
	}

	// Read client request
	String req = client.readStringUntil('\r');

	// Flush output
	client.flush();

	String text = ""; // Return text
	if(req.indexOf("/volume") != -1) {
		uint8_t idx = req.indexOf("?vol=");
		vol = req.substring(idx+5).toInt();
		vol = map(vol, 0, 100, 0, 30);
		mp3Player.volume(vol);
	} else if(req.indexOf("/play") != -1) {
		mp3Player.resume();
	} else if(req.indexOf("/pause") != -1) {
		mp3Player.pause();
	} else if(req.indexOf("/next") != -1) {
		mp3Player.playNext();
	} else if(req.indexOf("/previous") != -1) {
		mp3Player.playPrevious();
	} else if(req.indexOf("/change") != -1) {
		uint8_t idx = req.indexOf("?song=");
		song = req.substring(idx+6).toInt();
		mp3Player.play(song);
	} else if(req.indexOf("/led") != -1) {
	    uint8_t idx = req.indexOf("?R=");
	    uint8_t idxFin = req.indexOf("&G=");
	    R = req.substring(idx+3, idxFin).toInt();

	    idx = idxFin;
	    idxFin = req.indexOf("&B=");
	    G = req.substring(idx+3, idxFin).toInt();

	    idx = idxFin;
	    B = req.substring(idx+3).toInt();

	    R = map(R, 100, 0, 0, 1023);
	    G = map(G, 100, 0, 0, 1023);
	    B = map(B, 100, 0, 0, 1023);

	    analogWrite(Pin_R, R);
	    analogWrite(Pin_G, G);
	    analogWrite(Pin_B, B);
	}

	// Flush output
	client.flush();

	// Generate HTML output
	String htmlPage = "HTTP/1.1 200 OK\r\n";
	htmlPage += "Content-Type: text/html\r\n";
	htmlPage += "\r\n";
	htmlPage += "<!DOCTYPE html>\r\n";
	htmlPage += "<html>\r\n";
	htmlPage += "    <head>\r\n";
	htmlPage += "        <meta charset=\"utf-8\" />\r\n";
	htmlPage += "        <title>Enceinte Wi-Fille</title>\r\n";
	htmlPage += "        <style type=\"text/css\">\r\n";
	htmlPage += "            body {\r\n";
	htmlPage += "              background-color: #c862b7;\r\n";
	htmlPage += "            }\r\n";
	htmlPage += "            svg {\r\n";
	htmlPage += "              border-radius: 20px;\r\n";
	htmlPage += "           }\r\n";
	htmlPage += "        </style>\r\n";
 	htmlPage += "   </head>\r\n";

	htmlPage += "    <body>\r\n";

	htmlPage += "<svg width=\"320\" height=\"118\" version=\"1.1\" viewBox=\"0 0 320 118\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:cc=\"http://creativecommons.org/ns#\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\">  <metadata>   <rdf:RDF>    <cc:Work rdf:about=\"\">     <dc:format>image/svg+xml</dc:format>     <dc:type rdf:resource=\"http://purl.org/dc/dcmitype/StillImage\"/>     <dc:title/>    </cc:Work>   </rdf:RDF>  </metadata>  <path d=\"m0 59v-59h320v118h-320zm169.72 53.423c9.4306-1.948 19.247-6.7898 25.909-12.78l5.0577-4.5473 45.406-0.2979c43.887-0.28793 45.557-0.36897 49.906-2.4221 6.0327-2.8476 10.799-7.7582 13.748-14.164 2.2926-4.9806 2.4145-6.1452 2.0934-20-0.32307-13.94-0.48502-14.957-3.09-19.388-1.512-2.572-4.4118-6.047-6.444-7.7221-7.2739-5.9957-8.2444-6.0995-57.235-6.1216l-44.572-0.020094-4.4084-4.4393c-2.4246-2.4416-7.421-6.0224-11.103-7.9572-20.944-11.006-46.616-7.8537-64.671 7.9405l-5.1398 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	htmlPage += "	    <h1>Choix de musique</h1>\r\n";
	htmlPage += "	    <form method=\"get\" action=\"change\">\r\n";
	htmlPage += "		<input type=\"number\" min=\"1\" max=\"256\" value=\"" + String(song) + "\" name=\"song\"/>\r\n";
	htmlPage += "		<input type=\"submit\" value=\"Jouer\" />\r\n";
	htmlPage += "	    </form>\r\n";

	htmlPage += "	    <h1>Reglage du volume</h1>\r\n";
	htmlPage += "	    <form method=\"get\" action=\"volume\">\r\n";
	htmlPage += "		    <input type=\"number\" min=\"0\" max=\"100\" value=\"" + String(map(vol, 0, 30, 0, 100)) + "\" name=\"vol\"/>\r\n";
	htmlPage += "		    <input type=\"submit\" value=\"Changer le volume\"/>\r\n";
	htmlPage += "	    </form>\r\n";

	htmlPage += "	    <h1>Gestion de la lecture</h1>\r\n";
	htmlPage += "	    <div style=\"display: flex;\">\r\n";
	htmlPage += "		<form action=\"previous\"><input type=\"submit\" value=\"Précédent\"/></form>\r\n";
	htmlPage += "		<form action=\"play\"><input type=\"submit\" value=\"Jouer\"/></form>\r\n";
	htmlPage += "		<form action=\"pause\"><input type=\"submit\" value=\"Stopper\"/></form>\r\n";
	htmlPage += "		<form action=\"next\"><input type=\"submit\" value=\"Suivant\"/></form>\r\n";
	htmlPage += "	    </div>\r\n";

	htmlPage += "      <h1>Couleur LED (Rouge, Vert, Bleu)</h1>\r\n";
	htmlPage += "     <form method=\"get\" action=\"led\">\r\n";
	htmlPage += "   <input type=\"number\" min=\"0\" max=\"100\" value=\"" + String(map(R, 1023, 0, 0, 100)) + "\" name=\"R\"/>\r\n";
	htmlPage += "   <input type=\"number\" min=\"0\" max=\"100\" value=\"" + String(map(G, 1023, 0, 0, 100)) + "\" name=\"G\"/>\r\n";
	htmlPage += "   <input type=\"number\" min=\"0\" max=\"100\" value=\"" + String(map(B, 1023, 0, 0, 100)) + "\" name=\"B\"/>\r\n";
	htmlPage += "   <input type=\"submit\" value=\"Changer\" />\r\n";
	htmlPage += "     </form>\r\n";

	htmlPage += "    </body>\r\n";
	htmlPage += "</html>\r\n";

	// Send html output to client
	client.println(htmlPage);
	delay(1);
}

Connexion à l'enceinte

Cliquer pour afficher

1. Se connecter au WiFi de l'enceinte

Le nom du WiFi est EnceinteWiFilleX (où X est le numéro de l'enceinte)
Le mot de passe du WiFi est wifilles
(Si il y a un message indiquant qu'il n'y a pas d'accès internet, c'est normal, il faut lui dire de rester connecté)

2. Ouvrir un navigateur web (Firefox, Chrome ou autre)

3. Entrer l'URL 192.168.4.1 et charger la page

Ce contenu de Zoomacom est mis à disposition selon les termes de la Licence Creative Commons Attribution - Pas d’Utilisation Commerciale - Partage dans les Mêmes Conditions 4.0 International.
Arduino DIY Musique NodeMCU OpenFactory