ReSpeaker Raspberry Expansion Microphone Applications Review

ReSpeaker 2-Mics Pi HAT is a dual microphone expansion board for Raspberry Pi, designed for AI and voice applications. This means that you can build a more powerful and flexible voice product that can integrate Amazon Alexa voice service, Google Assistant, etc. The product use link is obtained in the product description. The board is developed based on WM8960, a low power stereo codec. There are 2 microphones on both sides of the board for collecting sounds and it also provides 3 APA102 RGB LEDs, 1 User Button and 2 on-board Grove interfaces for expanding your applications. What is more, 3.5mm Audio Jack or JST 2.0 Speaker Out are both available for audio output. Features: Raspberry Pi compatible(Support Raspberry Pi Zero, Raspberry Pi 1 B+, Raspberry Pi 2 B and Raspberry Pi 3 B); Dual-Microphones; 2 Grove Interfaces: support GPIO and I2C; Programmable Button and LED: one button and three LEDs; Audio codec onboard; Two types audio output socket : 3.5mm Audio Jack, JST2.0 Speaker Out; Far field support (up to 3 meters); Dimensions: 65mm x 30mm x 15mm; Battery: Exclude. Hardware Overview: Button: User-defined button connected to GPIO17; MIC_L&MIC_R: There is a microphone on the left side of the left; RGB LED: 3 APA102 RGB LEDs, SPI interface to Raspberry Pi; WM8960: Low-Power Stereo Codec; Raspberry Pi 40 Needle: Support Raspberry Pi Zero, Raspberry Pi 1 B +, Raspberry Pi 2 B and Raspberry Pi 3 B; POWER: Micro USB port used to power the ReSpeaker 2-Mics Pi HAT. Power the board while using the speaker to provide enough current. I2C: Grove I2C port, connected to I2C-1; GPIO12: Grove digital port, connected to GPIO12 and GPIO13; JST 2.0 SPEAKER OUT: For connecting speakers, JST 2.0 connector; 3.5mm audio jack: for connecting headphones or speakers with 3.5mm audio plugs; Note: This product does not include the Pi Zero board.