Jeff Epler
4715875cc4
.. leading zeros are required for `frontmatter` to treat them as dates
rather than strings, apparently per the YAML specification.
This was done by script:
```py
import re
import datetime
import pathlib
import sys
import frontmatter
rx = re.compile(r'^(\s*)date_added:.*$', re.M)
for path_str in sys.argv[1:]:
print(path_str)
path = pathlib.Path(path_str)
post = frontmatter.load(path)
date_added = post.get("date_added", "")
if isinstance(date_added, datetime.date):
continue
if isinstance(date_added, str):
try:
date_added = datetime.datetime.strptime(date_added, "%Y-%m-%d")
except ValueError as exc:
print(f"Failed to parse date {date_added} in {path_str}: {exc}")
continue
date_added = date_added.date()
content = path.read_text("utf-8")
new_content = rx.sub(lambda m: f"{m.group(1)}date_added: {date_added}", content)
assert content != new_content
path.write_text(new_content, "utf-8")
```
3.9 KiB
| layout | board_id | title | name | manufacturer | board_url | board_image | date_added | family | downloads_display | features | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| download | adafruit_itsybitsy_esp32 | Adafruit ItsyBitsy ESP32 Download | Adafruit ItsyBitsy ESP32 | Adafruit |
|
adafruit_itsybitsy_esp32.jpg | 2024-02-20 | esp32 | true |
|
What's smaller than a Feather but larger than a Trinket? It's an Adafruit ItsyBitsy ESP32, a powerful processor PCB with a plethora of pins! It features the ESP32 Pico module, an FCC-certified module that contains an ESP32 chip with dual-core 240MHz Tensilica processor, WiFi, and Bluetooth classic + BLE, configured with 8 MB of Flash memory, and 2 MB of PSRAM.
We've added some handy accessories like a USB to serial converter chip, power regulator, USB Micro B, buttons, NeoPixel, and Stemma QT I2C connector to outfit this super-hero chip for any task you want to throw it at. This is also an ultra low power ESP32 board with a deep sleep current consumption of 10uA!
At the core of the Itsy is the ESP32 (PICO ECO V3) chip, which is a single 2.4 GHz Wi-Fi and Bluetooth combo chip designed with TSMC’s 40 nm low-power technology. The ESP32 PICO in particular integrates all peripheral components seamlessly, including a crystal oscillator, flash, PSRAM, filter capacitors, and RF matching links in one single package. This makes it perfect for stuffing into a small space as the ItsyBitsy.
Please note, like other ESP32 modules, the ItsyBitsy ESP32 does not have native USB support - instead, there's a USB to serial converter chip. This means it cannot act like a USB keyboard or mouse, but it does have BLE and BT classic, so you could use it wirelessly.
Technical details
- Same size, form-factor as the remaining ItsyBitsy mainboards - with a similar but not identical pinout (there are no pins at the end of the board like most other Itsy's due to the radio antenna being there)
- USB Micro B - To maintain compatibility with the rest of the ItsyBitsy's
- ESP32 V2 03 Dual Core 240MHz Xtensa processor - the ESP32 you know and love, with the latest engineering fixes. Massive user base and thousands of existing projects and libraries to use.
- WiFi, Bluetooth LE, and BT Classic for any IoT project usage
- 8 MB Flash & 2 MB PSRAM
- USB to Serial converter built-in with high-speed UART for debugging and uploading, auto-reset circuit works perfectly with any ESP32 uploading tool.
- Can be used with Arduino IDE, CircuitPython or MicroPython
- Built-in RGB NeoPixel LED with power control to reduce quiescent power in deep sleep
- Built-in Red LED on pin D13
- 5V level-shifted output on D5, perfect for driving NeoPixels or other devices that want 5V logic signal
- Battery input pads on the underside with diode protection for external battery packs up to 6V input
- 20 General Purpose "IO" pins:
- 20 Pads expose pins from the ESP32:
- 3 are analog input only (A3, A4, A5)
- 1 is digital output only (5) with 5V level shifted up
- 13 x 12-bit analog inputs (A0, A1, A2, A3, A4, A5, D12, D13, D14, SDA, SCL, D32, D33)
- Dual 8-bit analog output DACs on A0/A1
- PWM outputs on any pin
- I2C port with STEMMA QT plug-n-play connector - a second I2C port can be defined on any other pins.
- Hardware UART in addition to the USB-serial UART
- Hardware SPI on the high speed SPI peripheral pins - a second SPI port can be defined on any other pins.
- Hardware I2S on any pins
- 8 x Capacitive Touch with no additional components required
- 3.3V regulator with 600mA peak output
- Light sleep at 4mA, deep sleep at ~10uA
- Reset switch for starting your project code over, for entering bootloader mode or for user reading
- User switch on pin 35
- Really small