Hi everyone !
I was supposed to upload gerbers of this project 2 years ago. The routing was almost done in Eagle, and... I went on with other interesting projects and left that one abandoned for a while.
I feel terrible for all the followers who were expecting updates. But luckily I've got motivated a few weeks ago to reboot this project. I'm proud to show you my first working prototype of the ESP32 audio recorder:
This time I started to work on the firmware before working on the hardware. It was built with parts I had lying around :
- Generic ESP32 development board with integrated USB-serial interface
- SSD1306 OLED display
- SD slot
- PCM1808 breakout board from AliExpress
I tried both ESP-IDF and ESP-ADF to write the firmware. In the end I chose ESP-IDF because I get more control over the ESP32 and also because of compatibility issues with 24-bits ADCs like the PCM1808 I'm using.