EC11 rotary encoder on rp2040 pico compliant - thonny micropython - feat. KY-040

caution - packaged application KY 040 from aliexpress is defective product
- switch signal is constantly random raised...moreover on turreting action

minor detail - because of this, on youtube about KY-040 clip
...omit the switch operation or ... maybe cunningly hidden

rotary encoder 3 pin - detect clock switch

EC11 rotary encoder : pin map, connection circuit

(+)---R(1k~10k)---detect pin                switch---R(1k~10k)---(+)

            (-)---ground pin      rotary

(+)---R(1k~10k)----clock pin                ground---(-)

rotary encoder  direction signal pulse pattern(phase 90 proceeding)

pin signals.

right - clock-wise -> increase

clock 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1... 
detect  1 0 0 1 1 0 0 1 1 0 0 1 1 0 0... 

all combination cases: 0100,0010,1011,1101

left - counter-clock-wise -> decrease

clock 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0...
detect  0 0 1 1 0 0 1 1 0 0 1 1 0 0 1...

all combination cases: 1000,0001,0111,1110

switch - 0,1

micropython-thonny : source code below

from machine import Pin,I2C

class Rotary: # detector, clock, switch(= push button) 
    def __init__(self, detect_pin, clock_pin, switch_pin, callback):
        self.detect = Pin(detect_pin, Pin.IN)
        self.clock = Pin(clock_pin, Pin.IN)
        self.switch = Pin(switch_pin, Pin.IN)        

        self.callback = callback
        self.detect.irq(handler=self.rotate, trigger = Pin.IRQ_RISING | Pin.IRQ_FALLING)
        self.clock.irq(handler=self.rotate, trigger = Pin.IRQ_RISING | Pin.IRQ_FALLING)
        self.switch.irq(handler=self.switching, trigger = Pin.IRQ_RISING | Pin.IRQ_FALLING)

        self.values = [0,0,self.clock.value(),self.detect.value()]
        self.last_wise = ""
        self.last_switch_value = 0

        self.direction = "CW"
        self.cws = ['0100','0010','1011','1101']
        self.ccws = ['1000','0001','0111','1110']

    def switching(self,pin):
        swval = self.switch.value()
        if swval != self.last_switch_value and swval == 1:
            print("switch call back here \n")
        self.last_switch_value = swval

    def rotate(self,pin):
        # print("clock",clock_value,"detect",detect_value,"switch",switch_value,"values",self.values)

        if clock_value == self.values[0] and detect_value == self.values[1]:
            return

        self.values.pop(0)
        self.values.pop(0)
        self.values.append(clock_value)
        self.values.append(detect_value)

        sv = "".join(map(str,self.values))

        if sv in self.cws:
            self.direction = 'CW'
        elif sv in self.ccws:
            self.direction = 'CCW'

        # print("clock",clock_value,"detect",detect_value,"switch",switch_value,"values",self.values)

        if clock_value == 1 and detect_value == 1 and sv != '1111':
            if clock_value == detect_value:
                if self.direction == 'CW':
                    print("+")
                    # self.callback.crease(1)
                elif self.direction == 'CCW':
                    print("-")
                    # self.callback.crease(-1)

#=========================================================================

try:
    ec11 = Rotary(detect_pin=27, clock_pin=26, switch_pin=28, callback=None)
except KeyboardInterrupt:
    pass