¶ MICROBIT
Pins 0-20: pads and edge connector (except 17 & 18, which are 3.3v connections)
Button A: pin 5
Button B: pin 11
Pins 23-28: COL4, COL5, COL6, ROW1, ROW2, ROW3
Analog input:
pins 0-4 and 10
Serial: RX-pin 0, TX-pin 1
I2C:
Pin 19 - SCL
Pin 20 - SDA
SPI:
Pin 13 - SPI Clock
Pin 14 - SPI MISO
Pin 15 - SPI MOSI
¶ MICROBIT V2
Pins 0-20: pads and edge connector (except 17 & 18, which are 3.3v connections)
Button A: pin 5
Button B: pin 11
Speaker: pin 27
Analog input:
pins 0-4 and 10
Microphone: pin A6
Serial: RX-pin 0, TX-pin 1
I2C:
Pin 19 - SCL
Pin 20 - SDA
SPI:
Pin 13 - SPI Clock
Pin 14 - SPI MISO
Pin 15 - SPI MOSI
¶ CALLIOPE MINI
Pins 0-19 are for the large pads and 26 pin connector
Button A: pin 20
Button B: pin 22
Motor/Speaker: pins 23-25
NeoPixel: pin 26
Analog inputs:
A0 - microphone
A1, A2 - pads 1 and 2
A3, A4, A5 - connector pins 4, 5, and 6
A6, A7 - connector pins 17, 18 and Grove connector 2
Serial: not supported
¶ CIRCUIT PLAYGROUND EXPRESS
Pins 0-7 Pads on board
Pin 8 - button A
Pin 9 - button B
Pin 10 - slide switch
Pin 11 - IR receiver
Pin 12 - IR transmitter
Pin 13 - red LED
Pin 14 - neopixels
Pin 15 - speaker disable
Analog inputs:
A0-A7 - Pads on board
Serial: RX-pin 6, TX-pin 7
¶ CIRCUIT PLAYGROUND BLUEFRUIT
Pins 0-7 Pads on board
Pin 8 - button A
Pin 9 - button B
Pin 10 - slide switch
Pin 11 - neopixels
Pin 12 - red LED
Analog inputs:
A0-A7 - Pads on board
Serial: RX-pin 6, TX-pin 7
¶ CLUE
Pins 0-20 Edge connector pins (except 17 & 18)
Pin 17 - red LED
Pin 18 - NeoPixel
Pin 21 - speaker
Pin 22 - white LED
Serial: RX-pin 0, TX-pin 1
I2C:
Pin 19 - SCL
Pin 20 - SDA
Clue i2c sensor addresses:
28 - LIS3MDL magnetometer
57 - APDS9960 light & gesture
68 - SHT31-D temp & humidity
106 - LSM6DS accelerometer & gyroscope
119 - BMP280 temperature & air pressure
¶ RPi PICO
https://datasheets.raspberrypi.com/pico/pico-datasheet.pdf
External Pins
Pins 0-22 - digital only
Pins 26-28 - analog or digital
Serial
Pin 0 - TX
Pin 1 - RX
I2C
Pin 4 - SDA
Pin 5 - SCL
SPI
Pin 16 - SPI MISO
Pin 17 - SPI SS
Pin 18 - SPI Clock
Pin 19 - SPI MOSI
Internal Pins
Pin 23 - (digital output) turn on for better voltage regulation (uses a bit more power)
Pin 24 - (digital input) detects USB connected
Pin 25 - (digital output) user LED
Pin 29 - (analog input) temperature sensor
¶ ESP32 boards including the M5Stack
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I2C: SDA-pin 21, SCL-pin 22
SPI: MOSI 23, MISO 19, CLK 18, CS 5
Serial: RX-pin 16, TX-pin 17
¶ ESP32-C3
13 usable pins: Pins 0-10 + 2 serial pins (which can also be used as GPIOs)
Pins 0-5 can be used for analog input
Serial:
Pins 18-19 on boards with USB-serial converter
Pins 20-21 on boards that use built-in USB-serial
I2C: SDA-pin 5, SCL-pin 6
Default NeoPixel: pin 8 (DevKitC-02)
Note: Boards that use built-in USB-serial may require manually entering boot mode before installing firmware by holding boot button for two seconds or holding the boot button while toggline the reset button. See the documentation for your board.
¶ ESP8266
Serial: TX-pin 4 (no RX; supports serial transmit only)
¶ Adafruit ItsyBitsy MO
23 general purpose pins
A0 - DAC analog output
D13 - User LED
D26 - DotStar Data
D27 - DotStar Clock
Serial: RX-pin 0, TX-pin 1
SnoPixel Neopixels - pin 7
¶ Adafruit Trinket MO
5 general purpose pins + 2 dotstar pins (7 total)
A0/D1 - DAC analog output
D5 - DotStar Data
D6 - DotStar Clock
¶ Adafruit Gemma MO
3 general purpose pins + 2 dotstar pins (5 total)
A0/D1 - DAC analog output
D3 - DotStar Data
D4 - DotStar Clock