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rgbled.py
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rgbled.py
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#!/usr/bin/env python
# TESTED WITH RASPBERRY PI 2 ONLY
import RPi.GPIO as GPIO
import sys, time
from daemon import Daemon
import os.path
class RGBLedDaemon(Daemon):
def __init__(self, *args, **kwargs):
self.cf = '/tmp/rgbled-daemon.color'
self.bf = '/tmp/rgbled-daemon.blink'
self.rpin = 17
self.gpin = 27
self.bpin = 22
#PWM frequency in Hz
self.freq = 100
self.color = [255, 0, 0]
self.rled = []
self.gled = []
self.bled = []
Daemon.__init__(self, *args, **kwargs)
def run(self):
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(self.rpin,GPIO.OUT)
GPIO.setup(self.gpin,GPIO.OUT)
GPIO.setup(self.bpin,GPIO.OUT)
self.rled = GPIO.PWM(self.rpin,self.freq)
self.gled = GPIO.PWM(self.gpin,self.freq)
self.bled = GPIO.PWM(self.bpin,self.freq)
self.rled.start(50)
self.gled.start(50)
self.bled.start(50)
while True:
if(os.path.isfile(self.cf) ):
self.color = [int(line) for line in open(self.cf, 'r')]
else:
self.color = [128,128,128]
if(os.path.isfile(self.bf) ):
self.blink = [int(line) for line in open(self.bf, 'r')]
else:
self.blink = [0]
self.rled.ChangeDutyCycle(100*self.color[0]/255)
self.gled.ChangeDutyCycle(100*self.color[1]/255)
self.bled.ChangeDutyCycle(100*self.color[2]/255)
time.sleep(0.75)
if(self.blink[0] == 1):
self.rled.ChangeDutyCycle(0)
self.gled.ChangeDutyCycle(0)
self.bled.ChangeDutyCycle(0)
time.sleep(0.75)
def stop(self, *args, **kwargs):
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(self.rpin,GPIO.OUT)
GPIO.setup(self.gpin,GPIO.OUT)
GPIO.setup(self.bpin,GPIO.OUT)
self.rled = GPIO.PWM(self.rpin,self.freq)
self.gled = GPIO.PWM(self.gpin,self.freq)
self.bled = GPIO.PWM(self.bpin,self.freq)
self.rled.ChangeDutyCycle(0)
self.gled.ChangeDutyCycle(0)
self.bled.ChangeDutyCycle(50)
time.sleep(1)
self.rled.stop()
self.gled.stop()
self.bled.stop()
GPIO.cleanup()
if os.path.exists(self.cf):
os.remove(self.cf)
if os.path.exists(self.bf):
os.remove(self.bf)
Daemon.stop(self, *args, **kwargs)
def setcolor(self, r, g, b):
newcolor=r+"\n"+g+"\n"+b
colors= {'color': newcolor}
with open(self.cf, 'w') as f:
f.write(colors['color'])
def changecolor(self, newcolor):
colors = {'red':"255\n0\n0",
'green': "0\n255\n0",
'blue': "0\n0\n255",
'white': "255\n255\n255",
'yellow': "241\n196\n15",
'orange': "230\n126\n34",
'cyan': "52\n152\n219",
'purple': "155\n89\n182",
'turquoise': "26\n188\n156",
'gray': "128\n128\n128",
'black': "0\n0\n0" }
if(newcolor in colors):
with open(self.cf, 'w') as f:
f.write(colors[newcolor])
def changeblink(self, newvalue):
values = {'on':"1",
'off': "0"}
if(newvalue in values):
with open(self.bf, 'w') as f:
f.write(values[newvalue])
if __name__ == "__main__":
daemon = RGBLedDaemon('/tmp/rgbled-daemon.pid')
if len(sys.argv) == 2:
if 'start' == sys.argv[1]:
daemon.start()
elif 'stop' == sys.argv[1]:
daemon.stop()
elif 'restart' == sys.argv[1]:
daemon.restart()
else:
print "Unknown command"
sys.exit(2)
sys.exit(0)
elif len(sys.argv) == 3:
if 'color' == sys.argv[1]:
daemon.changecolor(sys.argv[2])
elif 'blink' == sys.argv[1]:
daemon.changeblink(sys.argv[2])
elif len(sys.argv) == 5:
if 'set' == sys.argv[1]:
daemon.setcolor(sys.argv[2], sys.argv[3], sys.argv[4])
else:
print "Unknown command"
sys.exit(2)
sys.exit(0)
else:
print "usage: %s start|stop|restart|color [color]|blink [on|off]" % sys.argv[0]
sys.exit(2)