I need simple python code to run my PI GPIO with channgel relay

I have Raspberry Pi B+ and i just bought 8 channel relay. i successfully connected but i really need a simple code to run it to trun on and off the channel relay?

would you please help me

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0 clem57 over 10 years ago

Simsim,

#!/usr/bin/python
import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)

# init list with pin numbers

pinList = [17, 23]

# loop through pins and set mode and state to 'low'

for i in pinList: 
  GPIO.setup(i, GPIO.OUT) 
  GPIO.output(i, GPIO.HIGH)

# time to sleep between operations in the main loop

SleepTimeL = 2

# main loop

try:
  GPIO.output(17, GPIO.LOW)
  print "ONE"
  time.sleep(SleepTimeL); 
  GPIO.output(23, GPIO.LOW)
  print "TWO"
  time.sleep(SleepTimeL);  
 GPIO.cleanup()
  print "Good bye!"

# End program cleanly with keyboard
except KeyboardInterrupt:
  print " Quit"

  # Reset GPIO settings
  GPIO.cleanup()

This code assumes two relays are used and wired to BCM pin 17 and 23. If you wire differently, change pinlist and the two output as well.

Clem

Reply

0 clem57 over 10 years ago

Simsim,

#!/usr/bin/python
import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)

# init list with pin numbers

pinList = [17, 23]

# loop through pins and set mode and state to 'low'

for i in pinList: 
  GPIO.setup(i, GPIO.OUT) 
  GPIO.output(i, GPIO.HIGH)

# time to sleep between operations in the main loop

SleepTimeL = 2

# main loop

try:
  GPIO.output(17, GPIO.LOW)
  print "ONE"
  time.sleep(SleepTimeL); 
  GPIO.output(23, GPIO.LOW)
  print "TWO"
  time.sleep(SleepTimeL);  
 GPIO.cleanup()
  print "Good bye!"

# End program cleanly with keyboard
except KeyboardInterrupt:
  print " Quit"

  # Reset GPIO settings
  GPIO.cleanup()

This code assumes two relays are used and wired to BCM pin 17 and 23. If you wire differently, change pinlist and the two output as well.

Clem

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