Components

Displays

ht16k33, generic i2c driver for 8x8 LED Matrix

https://github.com/mcauser/deshipu-micropython-ht16k33

LCD1602, generic i2c LCD driver for 16x2 ... 40x4 screens

https://github.com/rhubarbdog/microbit-LCD-driver

tm1637, 4 digit 7 segment LED display

https://github.com/mcauser/microbit-tm1637

Temperature, Humdity and Weather

TMP35, TMP36 & TMP37 - Measure temperature with an analog device

The TMP36 converts between an analog voltage and degrees celcius via the following code snippet. TMP35 and TMP37 use similar logic but have different parameters.

The TMP36 produces 750 mV at 25°C and has an output scale factor of 10 mV/°C

millivolts = pin0.read_analog() * 3300 / 1023
degrees = ((millivolts - 750) / 10) + 25

DHT11 - digitally measure temperature and humidity

https://github.com/rhubarbdog/microbit-dht11

DHT12 - digitally measure temperature and humidity over the i2c bus

https://github.com/mcauser/microbit-dht12

AM2320 - digitally measure temperature and humidity over the i2c bus

https://github.com/mcauser/microbit-am2320

Keypads, Keyboards and Generic Input devices

mpr121 capacative touch keypad

https://github.com/rhubarbdog/microbit-mpr121-keypad

Distance

HC-SR04 - ultrsonic range finder

https://github.com/fizban99/microbit_hcsr04