Ai-Thinker ESP32-Audio-Kit - with Wi-Fi and Bluetooth

An audio development board based on an ESP32-A1S from Ai-Thinker. The ESP32-A1S is an ESP32 based module containing an audio CODEC with built-in DACs and ADCs, making this development board very well suited for audio projects. Ideal for adding Wi-Fi and/or Bluetooth to your audio project. The USB to serial converter makes it easy to program, even as an Arduino. The board has a micro USB connection with which it can be programmed and/or powered (micro USB cable not included).

Specifications:

• Supply voltage: 3.3V DC (via 3V3 pin), 5V DC (via micro USB) or 2.5 - 4.2V DC (via JST-XH 2p Li-ion/Li-Po battery connection)
• GPIO Voltage: 3.3V
• Microcontroller:
  • Chip: ESP32-S0WD (ESP32-A1S)
  • Clock Frequency: 240MHz
  • Processor cores: 2
  • SRAM: 520KB
  • PSRAM: 4MB
  • Flash memory: 4MB
  • Built-in Wi-Fi
  • Built-in Bluetooth
  • Number of GPIO pins: 9
  • Number of PWM pins: 9
  • Number of analog input pins (ADC): 1
  • Number of analog output pins (DAC): 0
• USB to serial converter: CP2102 (drivers)
• Battery circuit:
  • Chip: TP4056
  • Suitable batteries: Li-ion/Li-Po
  • Maximum charging voltage: 4.2V
  • Maximum charging current: 1A
  • Protection circuit: No
  • Battery connector: JST-XH 2p male
• Audio CODEC:
  • Chip: ES8388
  • ADC channels: 2 (for microphones or line-in)
  • DAC channels 2 (for amps or line-out)
• Amplifier:
  • Chip: NS4150 (2x)
  • Number of channels: 2 (stereo)
  • Maximum nominal output power per channel: 3W (4Ω speakers)
  • Speaker impedance range: 4 - 8Ω
• Audio connections:
  • Headphone/line-out: Audio jack 3.5mm
  • Line-in: Audio jack 3.5mm
  • Speakers: JST-XH 2p male
• 2 Built-in analog microphones
• 6 Built-in programmable buttons
• Built-in SD card holder
• Dimensions PCB: 68 x 82mm (without antenna), 74 x 82mm (with antenna)

Package contents:

• 1x ESP32-A1S Audio Development Board

See the tab "Downloads" for a datasheet of the ESP32-A1S including the schematic diagram of this board (section 5.2).

See the following page for sample code: ESP32-A1S-AudioKit .
The board definitions can be found here: Ai_thinker_audio_kit_v2_2

Note: The sample code is written for the ESP-IDF and is relatively complicated. It is recommended that you only start with this if you already have some programming experience.

Check the tab "Downloads" for more information and/or downloads.