ESP32 Feather V2 - 8MB Flash + 2 MB PSRAM - STEMMA QT

The Adafruit HUZZAH32 ESP32 is one of the most popular feathers and has now been given an upgrade! One of the biggest changes is the change from the obsolete CP2104 to the available CH9102F. Other key changes and improvements with the V2 include:

• Compared to the original Feather with 4 MB Flash and no PSRAM, the V2 has 8 MB Flash and 2 MB PSRAM
• Additional user button tactile switch on input pin 38
• Additional NeoPixel mini RGB LED with the controllable power pin
• Additional STEMMA QT port for plug and play I2C connections
• USB Type C port instead of Micro B
• Separate controllable 3.3V power supply for STEMMA QT to allow for ultra-low power consumption even with sensors are attached
• Designed for low power usage: verified with a PPK to draw 70uA from the Lipoly battery in deep sleep and 1.2mA in light sleep.
• ESP32 Pico module is much smaller, allowing for clear marking of all breakout pads and additional mounting holes!
• Upgrade the USB to the serial converter from CP2102 to CH9102F which is available for purchase! The CH9102F has no issues with uploading at 921600 bps for speedy firmware loading.

However, in order to add the PSRAM, and use the new Pico module which was small enough to allow all the fun extras, some of the breakout pads have changed, so here's what you need to know:

• The pin numbers for the I2C port (SDA, SCL), hardware UART (RX, TX), and SPI (SCK, MOSI, MISO) have changed. If your code has hardcoded use for those pins, you'll want to replace them either with the new numbers or change the code to use the 'pretty' names like SDA or SCK.
  When selecting the new Feather ESP32 V2 board in the Espressif board support package, the correct numbers will be substituted.
  Note the names are in the same spots, they haven't changed where the I2C/UART/SPI pins are located on the board, just which ESP32 pin numbers they are connected to in the module.
• The 'corner' pin next to TX has changed from pin 21 to 37. This pin is not used in any FeatherWings because it's considered an 'extra pin'. It's also changed from a GPIO to input-only
• The remaining numbered pins and A0-A5 pins have not changed pin numbers.

That module nestled in at the end of this Feather contains a dual-core ESP32 chip, 8 MB of SPI Flash, 2 MB of PSRAM, tuned PCB antenna, and all the passives you need to take advantage of this powerful new processor. The ESP32 has both WiFi and Bluetooth Classic/LE support. That means it's perfect for just about any wireless or Internet-connected project.

Because it's part of the Feather eco-system, you can take advantage of the 50+ Wings that they've designed to add all sorts of cool accessories. Plus that built-in battery charging and monitoring you know and love with the ESP32 Feather is still there in this upgrade.

• ESP32 Dual-core 240MHz Xtensa® processor - the classic dual-core ESP32 you know and love!
• The mini module has FCC/CE certification and comes with 8 MByte of Flash and 2 MByte of PSRAM - you can have huge data buffers
• Power options - USB type C or Lipoly battery
• Built-in battery charging when powered over USB-C
• LiPoly battery monitor with two 200K resistor divider
• Reset and User (I38) buttons to reset the board and as a separate input
• High-speed upload with auto-reset and serial debug with ultra-reliable CP2102N chipset.
• STEMMA QT connector for I2C devices, with switchable power, so you can go into low power mode.
• Charge/User LEDs + status NeoPixel with pin-controlled power for low power usage
• Low Power friendly! In deep sleep mode, we can get down to 80~100uA of current draw from the Lipoly connection. Quiescent current is from the power regulator, ESP32 chip, and Lipoly monitor. Turn off the NeoPixel and external I2C power for the lowest quiescent current draw.
• Works with Arduino or MicroPython

• ESP32­ Pico ­Mini 02 Datasheet