OpenTONY

Tunes Only Now Yours

Hardware

• ESP32 based audio board ESP32-Audio-Kit from Ai Thinker, schematic. The module on the board is a ESP32-A1S Audio module
• 4Ω3W speaker (x2)
• 1S LiIon Aku
• rfid reader
• accelerometer (t.b.d)
• LED (WS2812ish)
• 2 buttons (volume up & down)

free pins (potentianly) P1

• IO15 (JT_MTDO, SD_CMD ... CS)
• IO13 (JT_MTCK, SD card... maybe also in 1 bit mode.. MOSI)
• IO12 (SD2... MISO)
• IO14 (SD_CLK)

P2

• IO21 not free (AMP enable)
• IO22 (connected to LED)
• IO19 (connected to LED and KEY3)
• IO23 (KEY4)
• IO18 (KEY5)
• IO5 (KEY6 ESP32 thing...?)

SD Card

• up to 64GB, has to be FAT formatted.
• Current S1 DIP switch selections: 0 1 1 0 0, which also works for 4bit SD mode (using SDMMC library)
• https://github.com/pschatzmann/arduino-audiokit/wiki/Problems-with-the-SD-Drive-or-some-conflicting-Buttons
• https://github.com/espressif/arduino-esp32/tree/master/libraries/SD_MMC

Firmware

Currently the board can be controlled using Serial commands (end witn \n):
+,- for volume up and down
N,P for next and previous song
D to display directories and files
L to load mp3s from a directory, i.e. a "playlist"

Based on:

• https://github.com/pschatzmann/arduino-audiokit
• https://github.com/pschatzmann/arduino-audio-tools

Todos

• rfid over vspi - connected to P2 pins
• rfid over i2c?
• secondary board - via uart0, reading spi rfid reader, imu, LED, akku voltage reader, a few buttons...
• playlists
• upload files
• auto limit amount of playtime per day
• Li Aku saver
• upload files over web

code snippets

vspi = new SPIClass(VSPI); vspi.begin(VSPI_CLK, VSPI_MISO, VSPI_MOSI, VSPI_SS);