ESP32: Difference between revisions
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* Adafruit HUZZAH32 – ESP32 Feather Board, https://www.adafruit.com/product/3405 | * Adafruit HUZZAH32 – ESP32 Feather Board, https://www.adafruit.com/product/3405 | ||
* based on ESP-WROOM-32 module, uses ESP32-D0WDQ6 chip, https://en.wikipedia.org/wiki/ESP32 | * based on ESP-WROOM-32 module, uses ESP32-D0WDQ6 chip, https://en.wikipedia.org/wiki/ESP32 | ||
* board available from DigiKey quantity "hundreds" ~CAD$35 | * board available from DigiKey quantity "hundreds" ~CAD$35 | ||
Revision as of 12:50, 26 March 2020
Adafruit HUZZA32
- Adafruit HUZZAH32 – ESP32 Feather Board, https://www.adafruit.com/product/3405
- based on ESP-WROOM-32 module, uses ESP32-D0WDQ6 chip, https://en.wikipedia.org/wiki/ESP32
- board available from DigiKey quantity "hundreds" ~CAD$35
https://www.digikey.ca/product-detail/en/adafruit-industries-llc/3405/1528-2181-ND/7244967 https://www.digikey.ca/product-detail/en/adafruit-industries-llc/3591/1528-2514-ND/8119805
- USB power connector - connection for external 3.7 V battery, charged from USB - serial IO 3.3V RX+TX - 1x SPI (where is the rest?) - 1x I2C (where is the rest?) - 7 GPIO top, shared with 2 DACs and 6 ADCs - 7 GPIO bottom, shared with 7 ADCs and other functions - everything is 3.3V, *NOT* 5V safe - there is ADC1 and ADC2, not clear what it means, ADC voltage range not clear - ADC1 or ADC2 cannot be used with Wifi (this is unclear) - ESP32 SD card interface not connected - ESP32 serial IO connected to USB via USB-serial-bridge chip (the best I can tell) - power is USB with battery backup, one header pin provides regulated 3.3 V power to user (available current not clear, maybe 250 mA) , battery voltage is on A13
- suggested use with Ardiuno BSP (not mongoose OS)
- module schematic: https://cdn-learn.adafruit.com/assets/assets/000/041/630/original/feather_schem.png?1494449413
ESP-WROOM-32 module
- general page: https://www.espressif.com/en/products/hardware/modules
- product page: https://www.espressif.com/zh-hans/esp-wroom-32/resources (in Chineese)
- data sheet: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_cn.pdf (in Chineese)
- data sheet: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_en.pdf (English)
Information from adafruit: https://www.adafruit.com/product/3405 and https://learn.adafruit.com/adafruit-huzzah32-esp32-feather
- 240 MHz CPU, 520 kbytes SRAM, Wifi, Bluetooth, 4 Mbyte flash, interface for SD card. - 3x UART - 3x SPI - 2x I2C - 12 ADC inputs - 2 DAC - more goodies - everything is 3.3V, *NOT* 5V safe