Adafruit FLORA Wearable Electronic Platform v3

Round, sewable ATmega32u4 development board (45 mm diameter, 4.7 g) for e-textile projects, with 14 conductive-thread pads, onboard NeoPixel, micro-USB (HID), 3.3V/250mA regulator, and a polarized JST battery connector accepting 3.5–16 V input.
Pinout
- D0RXsewable pad
UART receive and GPIO
Type · GPIO, UARTVoltage · 3.3V logic - D1TXsewable pad
UART transmit and GPIO
Type · GPIO, UARTVoltage · 3.3V logic - D2SDAsewable pad
I2C data, GPIO, interrupt
Type · GPIO, I2CVoltage · 3.3V logic - D3SCLsewable pad
I2C clock, GPIO, interrupt
Type · GPIO, I2CVoltage · 3.3V logic - D6A7PWMsewable pad
GPIO, analog input, PWM
Type · GPIO, Analog, PWMVoltage · 3.3V logic - D9A9PWMsewable pad
GPIO, analog input, PWM
Type · GPIO, Analog, PWMVoltage · 3.3V logic - D10A10PWMsewable pad
GPIO, analog input, PWM
Type · GPIO, Analog, PWMVoltage · 3.3V logic - D12A11sewable pad
GPIO and analog input
Type · GPIO, AnalogVoltage · 3.3V logic - D14MISO2x3 SPI header
SPI MISO and GPIO
Type · GPIO, SPIVoltage · 3.3V logic - D15SCK2x3 SPI header
SPI clock and GPIO
Type · GPIO, SPIVoltage · 3.3V logic - D16MOSI2x3 SPI header
SPI MOSI and GPIO
Type · GPIO, SPIVoltage · 3.3V logic - VBATTsewable pad
Switched battery/USB-derived high-current output for NeoPixels or servos, not recommended as input
Type · PowerVoltage · battery/USB selected output - 3.3Vsewable pad
Onboard regulator output
Type · PowerVoltage · 3.3V, about 100mA recommended - GNDsewable pad
Ground
Type · GroundVoltage · 0V
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| D0RX | sewable pad | GPIO, UART | UART receive and GPIO | 3.3V logic |
| D1TX | sewable pad | GPIO, UART | UART transmit and GPIO | 3.3V logic |
| D2SDA | sewable pad | GPIO, I2C | I2C data, GPIO, interrupt | 3.3V logic |
| D3SCL | sewable pad | GPIO, I2C | I2C clock, GPIO, interrupt | 3.3V logic |
| D6A7PWM | sewable pad | GPIO, Analog, PWM | GPIO, analog input, PWM | 3.3V logic |
| D9A9PWM | sewable pad | GPIO, Analog, PWM | GPIO, analog input, PWM | 3.3V logic |
| D10A10PWM | sewable pad | GPIO, Analog, PWM | GPIO, analog input, PWM | 3.3V logic |
| D12A11 | sewable pad | GPIO, Analog | GPIO and analog input | 3.3V logic |
| D14MISO | 2x3 SPI header | GPIO, SPI | SPI MISO and GPIO | 3.3V logic |
| D15SCK | 2x3 SPI header | GPIO, SPI | SPI clock and GPIO | 3.3V logic |
| D16MOSI | 2x3 SPI header | GPIO, SPI | SPI MOSI and GPIO | 3.3V logic |
| VBATT | sewable pad | Power | Switched battery/USB-derived high-current output for NeoPixels or servos, not recommended as input | battery/USB selected output |
| 3.3V | sewable pad | Power | Onboard regulator output | 3.3V, about 100mA recommended |
| GND | sewable pad | Ground | Ground | 0V |
Pin details
14 connections- D0RXsewable pad
UART receive and GPIO
GPIO, UARTVoltage · 3.3V logic - D1TXsewable pad
UART transmit and GPIO
GPIO, UARTVoltage · 3.3V logic - D2SDAsewable pad
I2C data, GPIO, interrupt
GPIO, I2CVoltage · 3.3V logic - D3SCLsewable pad
I2C clock, GPIO, interrupt
GPIO, I2CVoltage · 3.3V logic - D6A7PWMsewable pad
GPIO, analog input, PWM
GPIO, Analog, PWMVoltage · 3.3V logic - D9A9PWMsewable pad
GPIO, analog input, PWM
GPIO, Analog, PWMVoltage · 3.3V logic - D10A10PWMsewable pad
GPIO, analog input, PWM
GPIO, Analog, PWMVoltage · 3.3V logic - D12A11sewable pad
GPIO and analog input
GPIO, AnalogVoltage · 3.3V logic - D14MISO2x3 SPI header
SPI MISO and GPIO
GPIO, SPIVoltage · 3.3V logic - D15SCK2x3 SPI header
SPI clock and GPIO
GPIO, SPIVoltage · 3.3V logic - D16MOSI2x3 SPI header
SPI MOSI and GPIO
GPIO, SPIVoltage · 3.3V logic - VBATTsewable pad
Switched battery/USB-derived high-current output for NeoPixels or servos, not recommended as input
PowerVoltage · battery/USB selected output - 3.3Vsewable pad
Onboard regulator output
PowerVoltage · 3.3V, about 100mA recommended - GNDsewable pad
Ground
GroundVoltage · 0V
Start wiring
USB · 3.3 V
Confirm the data interface matches your host board.
Module pins: VBATT, 3.3V, GND, D0 / RX, D1 / TX, D2 / SDA, D3 / SCL, D6 / A7 / PWM. Schematik maps them to your board in the app.
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