You will want to program the project before assembly.
The GitHub repository with all the code and audio samples is located here. Contents:
- Audio directory: 8 .OGG format sound files for the project - direct link
- BLEdogCollar directory: contains BLEdogCollar.ino, listed below.
To download the code, select Download: Project Zip.
// SPDX-FileCopyrightText: 2019 Anne Barela for Adafruit Industries
//
// SPDX-License-Identifier: MIT
// Smartphone-activated audio gizmo (e.g. talking dog collar).
// Uses the following Adafruit parts:
//
// - Bluefruit LE Micro (adafruit.com/product/2661)
// - 500 mAh LiPoly battery (1578)
// - LiPoly backpack (2124)
// - Audio FX Mini sound board (2342 or 2341)
// - 2.5W class D mono amp (2130)
// - Speaker (TBD)
//
// Needs Adafruit_BluefruitLE_nRF51 and Adafruit_Soundboard libs:
// github.com/adafruit
#include <SPI.h>
#include <SoftwareSerial.h>
#include <Adafruit_BluefruitLE_SPI.h>
#include <Adafruit_Soundboard.h>
#define LED A0 // LED on while "talking"
#define AUDIO_ACT 5 // "Act" on Audio FX
#define AUDIO_RESET 6 // "Rst" on Audio FX
Adafruit_Soundboard sfx(&Serial1, NULL, AUDIO_RESET);
Adafruit_BluefruitLE_SPI ble(8, 7, 4); // CS, IRQ, RST pins
char filename[12] = " OGG"; // Tail end of filename NEVER changes
// PROGMEM string arrays are wretched, and sfx.playTrack() expects a
// goofy fixed-length space-padded filename...we take care of both by
// declaring all the filenames inside one big contiguous PROGMEM string
// (notice there are no commas here, it's all concatenated), and copying
// an 8-byte section as needed into filename[]. Some waste, but we're
// not hurting for space. If you change or add any filenames, they MUST
// be padded with spaces to 8 characters, else there will be...trouble.
static const char PROGMEM bigStringTable[] = // play() index
"1 " "2 " "3 " "4 " // 0-3
"5 " "6 " "7 " "8 " // 4-7
"BOOT "; // 8-
void fail(uint16_t ms) { // If startup error, LED flash indicates status
for(uint8_t x=0;;) {
digitalWrite(LED, ++x & 1);
delay(ms);
}
}
void setup(void) {
pinMode(LED, OUTPUT);
digitalWrite(LED, HIGH); // LED steady on during init
Serial1.begin(9600); // Audio FX serial link
if(!sfx.reset()) fail(250); // Audio FX init error? Slow blink
if(!ble.begin(false)) fail(100); // BLE init error? Fast blink
ble.echo(false);
digitalWrite(LED, LOW); // LED off = successful init
play(8); // Play startup sound
}
void loop(void) {
if(ble.isConnected()) {
ble.println(F("AT+BLEUARTRX")); // Request string from BLE module
ble.readline(); // Read outcome
if(!strncmp(ble.buffer, "!B", 2) && // Controller button command
checkCRC(255-'!'-'B', 4) && // Verify checksum
(ble.buffer[3] == '1')) { // Button press? 1=press 0=release
play(ble.buffer[2] - '1');
}
ble.waitForOK();
}
}
boolean checkCRC(uint8_t sum, uint8_t CRCindex) {
for(uint8_t i=2; i<CRCindex; i++) sum -= (uint8_t)ble.buffer[i];
return ((uint8_t)ble.buffer[CRCindex] == sum);
}
void play(uint16_t i) {
digitalWrite(LED, HIGH);
memcpy_P(filename, &bigStringTable[i * 8], 8); // PROGMEM -> RAM
sfx.playTrack(filename);
delay(250); // Need this -- some delay before ACT LED is valid
while(digitalRead(AUDIO_ACT) == LOW); // Wait for sound to finish
digitalWrite(LED, LOW);
}
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