Tiny Alexa by ESP32-PICO-D4

Name: Tiny Alexa by ESP32-PICO-D4
SKU: 11392
Price: 32.00 USD
Availability: Discontinued

This item is out-of-production (too complex to finish the item), Here I would keep it just for your reference. (No refill anymore)

Designed by microwavemont in Japan

Product Retired

This product is no longer available for sale.

The seller may be offering an improved version or it may be hanging out on the beach, enjoying the retired life.

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Notice Apr.24: Due to the current international shipping delay, now only the domestic order is accepted. I will recover it ASAP shipping status recover.

This item is out-of-production (too complex to finish the item), Here I would keep it just for your reference. (No refill anymore)

What is it?

Very Tiny Alexa experiment board by ESP32-PICO-D4. The board includes ESP32-PICO-D4, CP2102 USB-UART, MAX98357 I2S DAC, WS2812 NeoPixel LED, Lipo charger and glue logic for programming.

Why did you make it?

Since the wonderful implementation by MrBuddyCasino's ESP32 Alexa, I am a bit addicted to this great application, stand-alone Alexa experiment by ESP32. For this purpose, I've made another board, ESP32-ADB-Edge, whose design is originated from ESP32-ADB which is very suitable for web radio and Bluetooth speaker with high-resolution DAC. However, the needs for the Alexa experiment and web radio is apparently different. Stereo high-resolution DAC is not needed for Alexa and also OLED is useless for Alexa. This time I completely re-designed the board specifically for Alexa experiment.

What makes it special?

Tiny size (25 x 36 mm), which is suitable for embedded application
ESP32-PICO-D4, all-in-one SOC is on-board
Single channel, Class-D amplifier embedded DAC, MAX98357 is connected to ESP32 through I2S bus.
MEMS microphone Invensense ICS-43434 is connected to ESP32 through I2S bus.
On-board USB-UART interface (CP2102) with several glue logic for direct binary uploading
NeoPixel WS2812 is on-board for Alexa status indicator (during listening to your voice, RED blinking, during answering BLUE blinking). This function and everything was implemented by MrBuddyCasino.

Notes

The original source of ESP32-Alexa uses "GPIO 17" for I2S MEMS microphone connection, however, GPIO 17 is pre-occupied by internal SPI flash connection of ESP32-PICO-D4. Please replace all of the files here with the original source for this board operation.