micropython-pico : additional libraries for Raspberry-Pi Pico running under MicroPython

to be documented

Libraries

The libraries must be copied on the MicroPython board before using the various examples.

On a WiFi capable plateform:

>>> import mip
>>> mip.install("github:mchobby/micropython-pico")

Or via the mpremote utility :

mpremote mip install github:mchobby/micropython-pico

What are the libraries:

servo.py : offers the Servo class used to control servo-moteur.
ultrasonic.py : offers the Ultrasonic class used to measure distances with a HC-SR04.
buzzer.py : allows to play sound with a Piezo Buzzer (default on GPIO7).
ws2812.py : use the WS2812 / NeoPixel Smart RGB leds (default on GPIO11).

By default, the library generates a pulse between 1.0 to 2.0 ms (mid-point at 1.5ms) for an angle from 0 to 180°.

>>> s=Servo(10)
>>> s.angle(0)
>>> s.angle(90)
>>> s.angle(180)

Pulse values can be changed by calling the set calibration() method

# default calibration
s.calibration( 1.0, 2.0, 1.5, 0, 180 )
# SG92R calibratioin
s.calibration( 0.5, 2.5, 1.5, 0, 180 )

An example is available in the following repository pico-projects under the file test_ultrasonic.py