{"NAME":"TinyS2","GPIO":[1,1376,3840,4704,1,1,1,1,1,1,0,0,0,0,1,0,0,1,1,0,0,0,1,0,1,1,1,1,0,0,0,0,3200,3232,0,0],"FLAG":0,"BASE":1}

A small form factor ESP32-S2 dev board.

This board uses an ESP32-S2F-N4R2 chip with 4 MB of flash and 2 MB of PSRAM.

When the board is booted into debug by holding BOOT and pressing the RESET button the USB port exposes a serial connection. This can be used to easily flash new firmware.

Flashing

Flash using Tasmota Web Installer and select Tasmota ESP32-S2 option.

For esptool.py download i.e. tasmota32s2.factory.bin and run esptool.py write_flash 0x0 tasmota32s2.factory.bin

To put ESP32-S2 in flash mode GPIO0 needs to be pulled low.

Device Notes

There are two versions of the TinyS2 with slightly different pinouts for the SPI pins.

TinyS2 Schematic

Peripherals

• WS2812B Neopixel
  • On GPIO1 with power on GPIO2.
  • Provided template configures this as WS2812 with GPIO2 as Output Hi for power.
• 1S LiPo battery management subsystem with 2-pin JST-SH connector
  • Battery voltage on GPIO3 and 5V/voltage detection on GPIO21
  • Provided template configures GPIO3 as ADC Input 1 and does not configure GPIO21.

GPIO Pin Mapping

The user pins labelled on the board are set up as User pins in the template.The pin numbers match the ESP’s internal GPIO number assignments allowing relatively easy module configuration without having to translate pin.

The only exception are the pins labeled TX and RX, which are set up as Serial TX/RX in the template.