#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
Created on Tue Jan 30 15:42:17 2018

@author: uli
"""

import pigpio
import sys

_BLUE  = 22
_RED   = 18
_GREEN = 17

if len(sys.argv) != 4:
    print "Usage: ",sys.argv[0], "r,g,b values 0..255" 
    sys.exit()
    
for i in range(1,4):
    if  int(sys.argv[i]) < 0:
        print "rgb values not in range 0..255 (negativ)"
        sys.exit()
    
for i in range(1,4):
    if int(sys.argv[i]) > 255:
        print "rgb values not in range 0..255 (too big)", i, " ", sys.argv[i]
        sys.exit()

pi = pigpio.pi()
pi.set_mode(_GREEN,pigpio.OUTPUT)
pi.set_mode(_RED,pigpio.OUTPUT)
pi.set_mode(_BLUE,pigpio.OUTPUT)

pi.write(_GREEN,pigpio.LOW)
pi.write(_RED,pigpio.LOW)
pi.write(_BLUE,pigpio.LOW)

print "Setting red component to ", sys.argv[1]
pi.set_PWM_dutycycle(_RED,sys.argv[1])
print "Setting green component to ", sys.argv[2]
pi.set_PWM_dutycycle(_GREEN,sys.argv[2])    
print "Setting blue component to ", sys.argv[3]
pi.set_PWM_dutycycle(_BLUE,sys.argv[3])