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Product: Adafruit (PID 3591) HUZZAH32 – ESP32 Feather Board (pre-soldered) The HUZZAH32 is our ESP32-based Feather, made with the official WROOM32 module. We packed everything you love about Feathers: built in USB-to-Serial converter, automatic bootloader reset, Lithium Ion/Polymer charger, and just about all of the GPIOs brought out so you can use it with any of our Feather Wings.

WROOM32 module nestled in at the end of this Feather contains a dual-core ESP32 chip, 4 MB of SPI Flash, tuned 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.

Here are specifications from Espressif about the ESP32:
240 MHz dual core Tensilica LX6 microcontroller with 600 DMIPS
Integrated 520 KB SRAM
Integrated 802.11b/g/n HT40 Wi-Fi transceiver, baseband, stack and LWIP
Integrated dual mode Bluetooth (classic and BLE)
4 MByte flash include in the WROOM32 module
On-board PCB antenna
Ultra-low noise analog amplifier
Hall sensor
10x capacitive touch interface
32 kHz crystal oscillator
3 x UARTs (only two are configured by default in the Feather Arduino IDE support, one UART is used for bootloading/debug)
3 x SPI (only one is configured by default in the Feather Arduino IDE support)
2 x I2C (only one is configured by default in the Feather Arduino IDE support)
12 x ADC input channels
2 x I2S Audio
2 x DAC
PWM/timer input/output available on every GPIO pin
OpenOCD debug interface with 32 kB TRAX buffer
SDIO master/slave 50 MHz
SD-card interface support The HUZZAH32 is our ESP32-based Feather, made with the official WROOM32 module
This version of the ESP32 Feather comes with plain 0.1" headers already soldered in so its ready for instant gratification and Feather fun!
Please note: The ESP32 is still targeted to developers. Not all of the peripherals are fully documented with example code, and there are some bugs still being found and fixed.
Comes fully assembled and tested, with a USB interface that lets you quickly use it with the Arduino IDE or the low-level ESP32 IDF. Lipoly battery and USB cable not included (but we do have lots of options in the shop if you'd like!)
Product Dimensions: 50.0mm x 23.0mm x 15.6mm / 2.0" x 0.9" x 0.6" Product Weight: 8.4g / 0.3oz Adafruit

Product: HiLetgo ESP32 ESP-32 ESP-32S ESP32S WiFi Bluetooth Wireless Board Module Based ESP-WROOM-32 Dual Core Mode CPU Lithium battery interface (battery not include), 500mA Max charging current.
Package Included:
1 x 16pin
1 x 20pin
1 x ESP32 Board HiLetgo

Product: HiLetgo ESP-WROOM-32 ESP32 ESP-32S Development Board 2.4GHz Dual-Mode WiFi + Bluetooth Dual Cores Microcontroller Processor Integrated with Antenna RF AMP Filter AP STA for Arduino IDE 2.4GHz Dual Mode WiFi + Bluetooth Development Board
Ultra-Low power consumption, works perfectly with the Arduino IDE
Support LWIP protocol, Freertos
SupportThree Modes: AP, STA, and AP+STA
ESP32 is a safe, reliable, and scalable to a variety of applications HiLetgo Black