Python Tutorials – Lesson 6 – Position Encoder sensor using Raspberry Pi Pico

To get the reading of position encoder sensor direction change using Raspberry Pi Pico

Required Components

1. Position encoder sensor_1 no
2. Raspberry Pi Pico_1 no
3. Connecting Wires_4 set

Circuit

Steps

1. Make sure the components are working properly.
2. Connect the position encoder sensor to the Raspberry Pi Pico.
3. Connect the Raspberry Pi Pico pin GP8 & GP9 to Position encoder sensor CLK & DT pin and Position encoder SW pin to the GP2 of Raspberry Pi Pico.
4. Connect the +5v and ground(gnd) connections respectively.
5. Check the Python program.
6. Check the Electrical Circuit.
7. Run the Python program.

Python Program

from machine import Pin
import utime

DT_Pin = Pin(9, Pin.IN, Pin.PULL_UP)
CLK_Pin = Pin(8, Pin.IN, Pin.PULL_UP)
SW = Pin(2, Pin.IN, Pin.PULL_UP)

LEDs = [25,4]

#create an empty list to assing pins in pico
led_pins = []

for x in range(0,2):
    led_pins.append(Pin(LEDs[x], Pin.OUT))    

value = 0
previousValue = 1

def rotary_changed():
    
    global previousValue
    global value
    
    if previousValue != CLK_Pin.value():
        if CLK_Pin.value() == 0:
            if DT_Pin.value() == 0:
          
                value = (value - 1)%2
                print("anti-clockwise", value)
            else:
                
                value = (value + 1)%2
                print("clockwise", value)                
        previousValue = CLK_Pin.value()         
         
    if SW.value() == 0:       
        print("Button pressed")
        utime.sleep(1)
        
while True:
    for i in range(0,2):
        led_pins[i].value(0)
        rotary_changed()
        led_pins[value].value(1)
        utime.sleep(0.001)