#!/usr/bin/env python
# author: Powen Ko
import serial
import time
import RPi.GPIO as GPIO

def readlineCR(port):
 rv = ""
 while True:
 ch = port.read()
 rv += ch
 if ch=='\r' or ch=='':
 return rv
 
GPIO.setmode(GPIO.BCM)
GPIO.setup(4,GPIO.OUT)
port = serial.Serial("/dev/ttyAMA0", baudrate=9600, timeout=3.0)


while True:
 rcv = readlineCR(port)
 print(rcv) 
 port.write(rcv)
 str1=rcv.find("h")
 if str1 > 0 :
 GPIO.output(4,1)
 str1=rcv.find("l") 
 if str1 > 0 :
 GPIO.output(4,0)
 time.sleep(0.1)








wget httpss://www.python.org/ftp/python/3.3.2/Python-3.3.2.tar.bz2
tar jxf ./Python-3.3.2.tar.bz2
cd ./Python-3.3.2
./configure --prefix=/opt/python3.3.2
make && sudo make install
python3.2 setup.py install
sudo apt-get install python-serial

#!/usr/bin/env python
# author: Powen Ko
import serial
import time

def readlineCR(port):
  rv = ""
  while True:
    ch = port.read()
    rv += ch
    if ch=='\r' or ch=='':
       return rv

port = serial.Serial("/dev/ttyAMA0", baudrate=115200, timeout=3.0)
while True:
  port.write("\r\nHi! I am Raspberry")
  rcv = readlineCR(port)
  port.write("\r\nYou sent:" + repr(rcv))
  time.sleep(1)



import time
import RPi.GPIO as GPIO

array1=[1,1,1,2,2,2]
array2=[10,20,30,10,20,100]
array3=[0.5,0.5,1.1,0.2,0.3,0.4]

GPIO.setup(GPIO.BCM)
GPIO.setup(4,GPIO.OUT)
p1=GPIO.PWM(4,100)
p1.start(0)
GPIO.setup(17,GPIO.OUT)
p2=GPIO.PWM(17,100)
p2.start(0)
GPIO.setup(27,GPIO.OUT)
p3=GPIO.PWM(27,100)
p3.start(0)
while Ture:
<%%KEEPWHITESPACE%%>  try:
<%%KEEPWHITESPACE%%>    x=0
<%%KEEPWHITESPACE%%>    for b in array1:
<%%KEEPWHITESPACE%%>      a=array2[x]
<%%KEEPWHITESPACE%%>      c=array3[x]
<%%KEEPWHITESPACE%%>      x=x+1
<%%KEEPWHITESPACE%%>      dc= int((a*19/180)+5
<%%KEEPWHITESPACE%%>      if b==1:
<%%KEEPWHITESPACE%%>        p1.ChangeDutyCycle(dc)
<%%KEEPWHITESPACE%%>      elif b==2:
<%%KEEPWHITESPACE%%>        p2.ChangeDutyCycle(dc)
<%%KEEPWHITESPACE%%>      elif b==3:
<%%KEEPWHITESPACE%%>       p3.ChangeDutyCycle(dc)
<%%KEEPWHITESPACE%%>      time.sleep(c)
<%%KEEPWHITESPACE%%>  except ValueError:
<%%KEEPWHITESPACE%%>    print("Not an interger valye")