ESP32-S2 Pins

code.py

# ESP32S2 pins:
# strapping pins*
#
#  0* wpu
#  2  amber LED on Cucumber
#  8  antitipated I2C SDA on production UMFeatherS2
#  9  antitipated I2C SCL on production UMFeatherS2
# 13  blue LED on UMFeatherS2
# 14  LED on Bast
# 15  I2C SDA on Bast
# 16  I2C SCL on Bast
# 18† NeoPixel on Saola & Cucumber
# 19  native USB D-
# 20  native USB D+
# 21  LDO2 enable on UMFeatherS2
# 26  INPUT-ONLY; wpu
# 33  I2C on pre-release UM FeatherS2
# 35  SPI MISO on Bast; SPI MOSI on UMFeatherS2
# 36  SPI SCK on Bast; SPI SCK on UMFeatherS2
# 37  SPI MOSI on bast; SPI MISO on UMFeatherS2
# 38  I2C on pre-release UMFeatherS2
# 39  [INPUT-ONLY]
# 40  I2C SDA on Cucumber; APA102 MOSI on UMFeatherS2
# 41  I2C SCL on Cucumber
# 42  [INPUT-ONLY]
# 43  wpu; "debug uart" TX
# 44  wpu; "debug uart" RX
# 45* wpd; APA102 SCK UMFeatherS2
# 46* INPUT-ONLY; wpd
#
""" †GPIO18 works as U1RXD and is in an uncertain state
when the chip is powered on, which may affect
the chip’s entry into download boot mode.
To solve this issue, add an external pull-up resistor. """

Espressif Saola
https://docs.espressif.com/projects/esp-idf/en/latest/esp32s2/hw-reference/esp32s2/user-guide-saola-1-v1.2.html

Gravitech Cucumber
https://www.gravitech.us/curesdebo.html

UnexpectedMaker FeatherS2
https://unexpectedmaker.com/shop/feathers2-esp32-s2

Electronic Cats Bast WiFi
https://electroniccats.com/blog/bast-wifi-con-el-poder-de-esp32-s2/