ESP32-PICO-ADB
==============

Designed by Microwavemont.

https://www.tindie.com/products/microwavemont/esp32-pico-adb/


Product Description
===================

My best seller ESP32-ADB gets a new Espressif's chip; ESP32-PICO-D4 is on-board.


What is it?
-----------

NEW Audio Developing Board (ADB) consists of Espressif's up-to-date chip
ESP32-PICO-D4, 2-ch high resolution audio DAC TI PCM5102A, and LiPo charger
and USB serial interface (CP2102).


Why did you make it?
--------------------

I was totally impressed by Espressif's latest chip ESP32-PICO-D4, "All-in-one
WiFi/Bluetooth chip except for antenna". I've already experienced on making
several ESP32 related developing board and I just want to try making my board
with this new chip.


What makes it special?
----------------------

• YES, ESP32-PICO-D4 on-board

• Tiny 64x32 pixels SSD1306 OLED display is connected to ESP32 through I2C.

• High resolution Audio 2ch-DAC TI PCM5102A on-board.

• LiPo charger circuit with Enable/Disable (USB bus power) jumper.

• Programmable by latest Espressif's ESP-IDF.
  (Arduino IDE support have some function limit.)

• Very thin (3 mm, excluding audio jack and jumper) and light-weight
  implementation.


Note for this item
------------------

This item is a developing board for early adaptor and experimenter. Firmware can
be re-programmed by esp-idf and initial firmware is Bluetooth speaker mode
(device name "hogehoge_mont"). As is in the picture above, this board can work
as web radio as same as my previous item (ESP32-ADB) but it requires programming
process. If larger OLED display is preferred, please consider ESP32-ADB[1]. This
board may be not suitable for "my first ESP32 board".

(Several issue related to latest esp-idf is fixed and new functions are merged
from n24bass's code. Please try new code![2]). For its operation, station switch
must be swapped from GPIO_NUM_16 to GPIO_NUM_0 for web radio operation.
Descriptions of switch are in "controls.c" in the source code. Please "find and
replace" from GPIO_NUM_16 to GPIO_NUM_0.


Video
=====

The movie below is made by the prototype with thin-wire jumpers. The production
version is modified without these jumpers.

"Webradio by ESP32-PICO-D4"
• URL: https://www.youtube.com/watch?v=nWwnk9-hwqU
• Date: 2017 September 11
• Duration: 2m38s


References
==========

[1] https://www.tindie.com/products/microwavemont/esp32-audio-developing-board-esp32-adb/
[2] https://github.com/kodera2t/ESP32_OLED_webradio