Grove - RotaryEncoder SKU: 111020001. Only negative data

Products & Technology Grove
#1

Hello

I’m using Grove RotaryEncoder from Grove Indoor Environment Kit with Intel Edison and python wrapper.
My code is based on Intel example

[code]import time, sys, signal, atexit
import pyupm_rotaryencoder as upmRotaryEncoder

Instantiate a Grove Rotary Encoder, using signal pins D2 and D3

myRotaryEncoder = upmRotaryEncoder.RotaryEncoder(2, 3);

Exit handlers

This function stops python from printing a stacktrace when you hit control-C

def SIGINTHandler(signum, frame):
raise SystemExit

This function lets you run code on exit, including functions from myRotaryEncoder

def exitHandler():
print “Exiting”
sys.exit(0)

Register exit handlers

atexit.register(exitHandler)
signal.signal(signal.SIGINT, SIGINTHandler)

Read the value every second and detect motion

while(1):
print “Position: {0}”.format(myRotaryEncoder.position())
time.sleep(.1)[/code]

But, I can’t understand, why I’m receiving only negative data in all ways of rotating

rotary_encoder = upmRotaryEncoder.RotaryEncoder(2, 3)
last_data = None
while (True):
    current_data = rotary_encoder.position()
    if current_data != last_data:
        last_data = current_data
        print("Position: {0}".format(last_data))
        time.sleep(.1)

snip_20150912141659.png