Rotary Encoders

Rotary Encoder

For basic information on rotary encoders, refer to this great tutorial from Adafruit

Basic Test

Try the example below by changing the pin definition

import board
import rotaryio
# Encoder Setup
encoder = rotaryio.IncrementalEncoder(board.P0_26, board.P0_06)
last_position = None
while True:
position = encoder.position
if last_position is None or position != last_position:
print(position)
last_position = position

If you want to see an example of how to read a rotary encoder, see this video

miniMacro5 - 5 Encoders Test

Note: CircuitPython seems to only support up to 4 rotary encoders for the nRF52. Internally, it uses 2 GPIOTE channels to monitor the encoder and trigger updates when rotation is happening. Since the nRF52840 has 8 GPIOTE channels, up to 4 rotary encoders are available. Other features may use GPIOTE channels and as such, the maximum number of rotary encoders which can be initialized may be less. If you want to see more information on how it's implemented, go see the updated files for this Pull request

import board
import rotaryio
# Encoder Setup
encoder1 = rotaryio.IncrementalEncoder(board.P0_26, board.P0_06)
encoder2 = rotaryio.IncrementalEncoder(board.P0_08, board.P0_29)
encoder3 = rotaryio.IncrementalEncoder(board.P0_15, board.P0_02)
encoder4 = rotaryio.IncrementalEncoder(board.P0_17, board.P0_20)
encoder5 = rotaryio.IncrementalEncoder(board.P0_09, board.P0_13)
last_position1 = None
last_position2 = None
last_position3 = None
last_position4 = None
last_position5 = None
while True:
position1 = encoder1.position
position2 = encoder2.position
position3 = encoder3.position
position4 = encoder4.position
position5 = encoder5.position
if last_position1 is None or position1 != last_position1:
print(position1, position2, position3, position4, position5)
if last_position2 is None or position2 != last_position2:
print(position1, position2, position3, position4, position5)
if last_position3 is None or position3 != last_position3:
print(position1, position2, position3, position4, position5)
if last_position4 is None or position4 != last_position4:
print(position1, position2, position3, position4, position5)
if last_position5 is None or position5 != last_position5:
print(position1, position2, position3, position4, position5)
last_position1 = position1
last_position2 = position2
last_position3 = position3
last_position4 = position4
last_position5 = position5