Hardware features and pinout
Hardware overview#
The badge is powered a powerful ARM Cortex-M4 Processor with 1MB of internal Flash memory (which holds the CircuitPython operating system), 16MB of external Flash memory (where your Python code and files are stored), and built-in Bluetooth Low Energy 5 and ZigBee Radio.
The hardware includes a 296x128 E-Paper display, 3-axis accelerometer, two RGB smart LEDs (NeoPixel/WS2812), a vibration motor, 5 input buttons, a USB-C connector, and a LiPo battery recharging circuit.
Extension ports#
The badge includes two hardware extension ports. They both include I2C connectivity:
- Front port with 6 pins: VCC, GND, SCL, SDA, GPIO1, GPIO2.
- Back port with 8 pins: VCC, GND, SCL, SDA, D1, D2, D3, D4.
The GPIO1/2 and D1/2/3/4 pins are digital GPIO pins that can be used for any purpose. GPIO1/2 can also be used as analog inputs.
Hardware details#
- nRF52840 64MHz ARM Cortex-M4F64 CPU with 1MB flash, 256KB ram, USB, Bluetooth Low Energy 5, Thread, and Zigbee
- GDEW029T5 2.9 inch e-paper glass display
- LIS2DH12 I²C Accelerometer
- W25Q128JV 128MBit (16MB) Serial Flash
- Shitty Add-On V1.69BIS Connector
- 8-Pin extension slot (on the back) with I2C interface
- 5 x 6mm Push Buttons
- 2 x WS2812B "NeoPixel" Addressable RGB LEDs
- 1 x Green Indication LED (on the back)
- Reset Button
- Vibration motor
- LiPo battery connector with built-in charger (for 500mA-1000mA battery)
- Power switch
- SOICbite SWD debug port
Pinout#
Usually, you shouldn't care about this, as it's abstracted by the firmware code. But in case you are still interested, here is the hardware pinout:
| Pin | Component | Function |
|---|---|---|
| P0.00 | Extension Slot | D2 Pin |
| P0.01 | E-Paper | SCLK |
| P0.02 | Pushbutton | Down |
| P0.03 | Accelerometer, SAO | SDA |
| P0.04 | SAO | GPIO1 |
| P0.05 | SAO | GPIO2 |
| P0.06 | E-Paper | RESET |
| P0.07 | E-Paper | CS |
| P0.08 | WS2812 Neopixels | DATA |
| P0.10 | Pushbutton | Action |
| P0.12 | E-Paper | D/C |
| P0.13 | Extension Slot | D3 Pin |
| P0.15 | Extension Slot | D1 Pin |
| P0.17 | Vibrator | Vibrate |
| P0.20 | Serial Flash | SO/IO1 |
| P0.22 | Serial Flash | SI/IO0 |
| P0.24 | Extension Slot | D4 Pin |
| P0.26 | E-Paper | BUSY |
| P0.28 | Accelerometer, SAO | SCL |
| P0.29 | Pushbutton | Left |
| P0.30 | Battery Voltage | Analog |
| P0.31 | Pushbutton | Top |
| P1.00 | Serial Flash | SCK |
| P1.02 | Serial Flash | CS |
| P1.04 | Serial Flash | WP/IO2 |
| P1.06 | Serial Flash | HOLD/IO3 |
| P1.09 | E-Paper | MISO |
| P1.10 | E-Paper | MOSI |
| P1.11 | Red LED | Cathode |
| P1.13 | Pushbutton | Right |
Schematic and KiCad EDA files#
Technical drawing#
