#!/usr/bin/python
import time
import sys
# Import CircuitPlayground class from the circuitplayground.py in the same directory.
from circuitplayground import CircuitPlayground
# Grab the serial port from the command line parameters.
if len(sys.argv) != 2:
print('ERROR! Must specify the serial port as command line parameter.')
sys.exit(-1)
port = sys.argv[1]
# Connect to Circuit Playground board on specified port.
board = CircuitPlayground(port)
# Define function that will be called when data is received from the light sensor.
def light_data(data):
# Print out the raw light sensor ADC value (data[2] holds the value).
print('Light sensor: {0}'.format(data[2]))
# Setup Firmata to listen to light sensor analog input (A5).
# The callback function will be called whenever new data is available.
board.set_pin_mode(5, board.INPUT, board.ANALOG, light_data)
# Loop forever printing light values as they change.
print('Printing light sensor values (Ctrl-C to quit)...')
while (True):
time.sleep(
