Relative Rotary Encoder SENSOR

Specification

What		Comments
Identifier	REL_ROT_ENCODER
Interface	3 GPIO	GPIO 1: A signal
		GPIO 2: B signal
		GPIO 3: SW signal (switch)
Provides	dir	-1: counter clockwise
		0: no movement
		1: clockwise
	val	encoder value
	sw	0: switch released
		1: switch pushed
Properties	none

Code

In this example an encoder is attached at GPIO26 (A), GPIO14 (B) and GPIO21 (C)

s = sensor.attach("REL_ROT_ENCODER", pio.GPIO26, pio.GPIO14, pio.GPIO21)

s:callback(
   function(magnitude)
      if (magnitude["dir"] == -1) then
         print("ccw, value "..magnitude["val"])
      elseif (magnitude["dir"] == 1) then
         print("cw, value "..magnitude["val"])
      end
   end
)

s:callback(
   function(magnitude)
      if (magnitude["sw"] == 0) then
         print("released")
      elseif (magnitude["sw"] == 1) then
         print("pressed")
      end
   end
)