Raspberry Pi Pico - CircuitPython volume knob

main.py

import digitalio
import board
import usb_hid
import time
from adafruit_hid.keyboard import Keyboard
from adafruit_hid.mouse import Mouse
from adafruit_hid.keycode import Keycode
from adafruit_hid.consumer_control import ConsumerControl
from adafruit_hid.consumer_control_code import ConsumerControlCode

print("== Pi Pico multifunction knob 1.0 ==")

CLK_PIN = board.GP4
DT_PIN = board.GP3
SW_PIN = board.GP2
clk_last = None
count = 0
totalMode = 3
currentMode = 0

cc = ConsumerControl(usb_hid.devices)
mouse = Mouse(usb_hid.devices)
keyboard = Keyboard(usb_hid.devices)


clk = digitalio.DigitalInOut(CLK_PIN)
clk.direction = digitalio.Direction.INPUT

dt = digitalio.DigitalInOut(DT_PIN)
dt.direction = digitalio.Direction.INPUT

sw = digitalio.DigitalInOut(SW_PIN)
sw.direction = digitalio.Direction.INPUT
sw.pull = digitalio.Pull.UP

def millis():
    return time.monotonic() * 1000

def ccw():
    print("CCW")
    
    if (currentMode == 0):    # Mac brightness down
        keyboard.send(Keycode.SCROLL_LOCK)
        
    elif(currentMode ==1):    # Mac horizontal scroll right
        keyboard.press(Keycode.SHIFT)
        mouse.move(wheel=-1)
        keyboard.release(Keycode.SHIFT)

    elif(currentMode == 2):   # Volume decrement
        cc.send(ConsumerControlCode.VOLUME_DECREMENT)
        
def cw():
    print("CW")
    if (currentMode == 0):     # Mac brightness up
        keyboard.send(Keycode.PAUSE)              
        
    elif(currentMode ==1):     # Mac horizontal scroll left
        keyboard.press(Keycode.SHIFT)
        mouse.move(wheel=1)
        keyboard.release(Keycode.SHIFT)
   
    elif(currentMode == 2):     # Volume increment
        cc.send(ConsumerControlCode.VOLUME_INCREMENT)

        
def long_press():
    #Mac sleep: CMD + OPT + EJECT
    keyboard.press(Keycode.ALT, Keycode.COMMAND)  
    cc.send(ConsumerControlCode.EJECT)
    keyboard.release_all()

while(1):
    clkState = clk.value
    if(clk_last !=  clkState):
        if(dt.value != clkState):
            cw()
        else:
            ccw()
            
    if (sw.value == 0):
        pressTime = millis()
        time.sleep(0.2)
        longPress = False
        
        while(sw.value == 0):
            if(millis() - pressTime > 1000 and not longPress):
                print("longPress")
                longPress = True
                long_press()
                

        if (not longPress):
            currentMode += 1
            currentMode %= totalMode
            print("Mode: " + str(currentMode))
            
    clk_last = clkState
    

If anyone is interested, I've made some improvements to the code, for example fixing the problem that the knob sometimes stops working. Xitee1/multimedia-knob

If anyone is interested, I've made some improvements to the code, for example fixing the problem that the knob sometimes stops working. Xitee1/multimedia-knob

Thanks!

got error Traceback (most recent call last):
File "", line 5, in
ImportError: no module named 'adafruit_hid'

got error Traceback (most recent call last): File "", line 5, in ImportError: no module named 'adafruit_hid'

You haven't copied the adafruit_hid library to the pico. Follow the instructions carefully. Check out my version of the knob (comment above). There you can download and extract the library from if you can't find it online.

thanks will try...just starting here ; - )

thanks alot...

If anyone is interested, I added some features on this, click on the link for more information luckkyboy/multimedia-knob

thanks alot...

If anyone is interested, I added some features on this, click on the link for more information luckkyboy/multimedia-knob

I finally got to try it out and it works very well so far.
I'll add a link to it in my repo as I will use your's from now on 😄
But you should definitively enable issues for your repo.
Also, it took me a while to find out that you've swapped the pins which made the knob behave weirdly 😆

thanks alot...
If anyone is interested, I added some features on this, click on the link for more information luckkyboy/multimedia-knob

I finally got to try it out and it works very well so far. I'll add a link to it in my repo as I will use your's from now on 😄 But you should definitively enable issues for your repo. Also, it took me a while to find out that you've swapped the pins which made the knob behave weirdly 😆

Cooool!
So happy you did that!
You can get more information from readme of GPIO or parts list