ESP32: Difference between revisions
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* board available from DigiKey quantity "hundreds" ~CAD$35 | * 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 | |||
* Pinouts & etc: https://learn.adafruit.com/adafruit-huzzah32-esp32-feather/pinouts | * Pinouts & etc: https://learn.adafruit.com/adafruit-huzzah32-esp32-feather/pinouts | ||
** 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 | |||
, battery voltage is on A13 | |||
* suggested use with Ardiuno BSP (not mongoose OS) | * suggested use with Ardiuno BSP (not mongoose OS) | ||
Revision as of 12:53, 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
- 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
- ESP32 chip is a very basic microcontroller, CPU is done by same people who did MIPS CPUs.
- ESP32 is supported by "Mongoose OS", familiar with it as we already use the mongoose web server from same people.
- 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