GPIO Overview by Selected Board

For the audio to work with your board you need to select the right audio chip (e.g. ES8388) and have the right I2C and I2S pins defined. Unfortunately there is a big variety of different alternatives.

Selected Boards:

• 1 lyrat_v4_3 (ES8388)
• 2 lyrat_v4_2 (ES8388) - DRAFT Not Tested
• 3 lyrat_mini_v1_1 (ES8311) - DRAFT Not Tested
• 4 esp32_s2_kaluga_1_v1_2 (ES8311) - DRAFT Not Tested
• 5 ai_thinker (ES8388) 2957 3478
• 6 ai_thinker (AC101) 2762 2957
• 7 ai_thinker (ES8388) 2957
• 10 generic_es8388
• 11 generic_es8311

Interface	Pin	1	2	3	4	5	6	7	10	11
I2C	sda	18	18	18	8	33	33	18	33	18
I2C	scl	23	23	23	7	32	32	23	32	23
I2S	bck	5	5	5	18	27	27	5	27	5
I2S	ws	25	25	25	17	25	26	25	25	25
I2S	data_out	26	26	26	12	26	25	26	26	26
I2S	data_in	35	35	35	46	35	35	35	35	35
I2S	mclk	0	0	0	0	0	0	0	0	0
SPI	cs	13	13	13	13	13	13	13	13	13
SPI	miso	2	2	2	2	2	2	2	2	2
SPI	mosi	15	15	15	15	15	15	15	15	15
SPI	clk	14	14	14	14	14	14	14	14	14

The selected board is loading the information which is defined in src/audio_board as default values. These values however can be changed by overwriting the AudioKitConig values.

When you use generic versions with PlatformIO, you can also override each pin individually in the platformio.ini file. For the available defines please check the es8388 board_def.h or the es8311 board_def.h.

Defines

The following defines are usually made available in the board_def.h:

• PIN_AUDIO_KIT_SD_CARD_CS
• PIN_AUDIO_KIT_SD_CARD_MISO
• PIN_AUDIO_KIT_SD_CARD_MOSI
• PIN_AUDIO_KIT_SD_CARD_CLK
• SDCARD_INTR_GPIO
• BUTTON_REC_ID
• BUTTON_MODE_ID
• BUTTON_SET_ID
• BUTTON_PLAY_ID
• BUTTON_VOLUP_ID
• BUTTON_VOLDOWN_ID
• PIN_KEY1
• PIN_KEY2
• PIN_KEY3
• PIN_KEY4
• PIN_KEY5
• PIN_KEY6
• AUXIN_DETECT_GPIO
• PA_ENABLE_GPIO
• GREEN_LED_GPIO
• RED_LED_GPIO