Add web radio example (#20)

A simple stream handler to play web radio stations using ESP8266

examples/WebRadioDemo/WebRadioDemo.ino

@@ -0,0 +1,131 @@
+/**
+  A simple stream handler to play web radio stations using ESP8266
+
+  Copyright (C) 2018 Vince Gellár (github.com/vincegellar)
+  Licensed under GNU GPL v3
+  
+  Wiring:
+  --------------------------------
+  | VS1053  | ESP8266 |  Other   |
+  --------------------------------
+  |   SCK   |   D5    |    -     |
+  |   MISO  |   D6    |    -     |
+  |   MOSI  |   D7    |    -     |
+  |   XRST  |    -    |    -     |
+  |   CS    |   D1    |    -     |
+  |   DCS   |   D0    |    -     |
+  |   DREQ  |   D3    |    -     |
+  |   5V    |    -    |   VCC    |
+  |   GND   |    -    |   GND    |
+  --------------------------------
+
+  Dependencies:
+  -VS1053 library by baldram (https://github.com/baldram/ESP_VS1053_Library)
+  -ESP8266Wifi
+
+  To run this example define the platformio.ini as below.
+
+  [env:nodemcuv2]
+  platform = espressif8266
+  board = nodemcuv2
+  framework = arduino
+  build_flags = -D PIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH
+
+  lib_deps =
+    ESP_VS1053_Library
+
+  Instructions:
+  -Build the hardware
+    (please find an additional description and Fritzing's schematic here:
+     https://github.com/vincegellar/Simple-Radio-Node#wiring)
+  -Set the station in this file
+  -Upload the program
+
+  IDE Settings (Tools):
+  -IwIP Variant: v1.4 Higher Bandwidth
+  -CPU Frequency: 160Hz
+*/
+
+#include <VS1053.h>
+#include <ESP8266WiFi.h>
+
+#define VS1053_CS     D1
+#define VS1053_DCS    D0
+#define VS1053_DREQ   D3
+
+// Default volume
+#define VOLUME  80
+
+VS1053 player(VS1053_CS, VS1053_DCS, VS1053_DREQ);
+WiFiClient client;
+
+// WiFi settings example, substitute your own
+char* ssid = "TP-Link";
+const char* password = "xxxxxxxx";
+
+//  http://comet.shoutca.st:8563/1
+const char *host = "comet.shoutca.st";
+const char *path = "/1";
+int httpPort = 8563;
+
+uint8_t mp3buff[32];
+
+void setup () {
+    Serial.begin(115200);
+
+    // Wait for VS1053 and PAM8403 to power up
+    // otherwise the system might not start up correctly
+    delay(3000);
+
+    // This can be set in the IDE no need for ext library
+    // system_update_cpu_freq(160);
+
+    Serial.println("\n\nSimple Radio Node WiFi Radio");
+
+    SPI.begin();
+
+    player.begin();
+    player.switchToMp3Mode();
+    player.setVolume(VOLUME);
+
+    Serial.print("Connecting to SSID "); Serial.println(ssid);
+    WiFi.begin(ssid, password);
+
+    while (WiFi.status() != WL_CONNECTED) {
+      delay(500);
+      Serial.print(".");
+    }
+
+    Serial.println("WiFi connected");  
+    Serial.println("IP address: ");  Serial.println(WiFi.localIP());
+
+    Serial.print("connecting to ");  Serial.println(host);
+
+    if (!client.connect(host, httpPort)) {
+      Serial.println("Connection failed");
+      return;
+    }
+
+    Serial.print("Requesting stream: ");
+    Serial.println(path);
+
+    client.print(String("GET ") + path + " HTTP/1.1\r\n" +
+                  "Host: " + host + "\r\n" + 
+                  "Connection: close\r\n\r\n");
+}
+
+void loop() {
+    if(!client.connected()){
+      Serial.println("Reconnecting...");
+      if(client.connect(host, httpPort)){
+        client.print(String("GET ") + path + " HTTP/1.1\r\n" +
+                  "Host: " + host + "\r\n" + 
+                  "Connection: close\r\n\r\n");
+      }
+    }
+
+    if(client.available() > 0){
+      uint8_t bytesread = client.read(mp3buff, 32);
+      player.playChunk(mp3buff, bytesread);
+    }
+}