¶ 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
I2C: SDA-pin 21, SCL-pin 22
SPI: MOSI 23, MISO 19, CLK 18, CS 5
Serial: RX-pin 16, TX-pin 17
¶ 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