This is the second version of the smallest ESP32 in the world (link).
This time I've increased its size from 10x10x10mm to 15x21x4mm, but don't take me wrong, it still is the smallest ESP32 ever! Apart from my first version of course.
The circuit is made of 4 PCB layers instead of 6 (first version) and have the following features:
- Micro USB
- DC-DC converter with current capacity up to 1A
- FTDI chip for USB-UART conversion
- ESP32 Pico D4 MCU
- 4 buttons (1 reset + 3 multi purpose)
- 2.2 dbi antenna for WIFI and bluetooth
- Connector for external antenna with signal pass through
- 16 pads 2.54mm pitch for GPIO / Power
- Temperature sensor
- Air pressure sensor
- Humidity sensor
- Gas air quality sensor (VOC)
- 3-axis gyroscope and accelerometer sensor
- 64x32 OLED screen
