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

Do you have any sample code that you've tried so far?

What make/model is the board?

Could this be what you are looking for?:

https://www.youtube.com/watch?v=oaf_zQcrg7g

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

Dear: Simsim

You should know that it is fairly simple using GPIO. As a matter of a fact I used GPIO to make an LED blink Morse code. You should know the code is simple. Try this in python.

import RPi.GPIO as GPIO
import time

You should know that this basically imports GPIO and time so we can use the GPIO board and use time to control the amount of GPIO we use but it does not do anything else. Try this to turn on the board.

GPIO.setmode(GPIO.BOARD)

This will turn on the board try this to create an output.

number = 37
GPIO.setup(number,GPIO.OUT)
GPIO.output(number,True)

Of course there are many ways to create an output but this is the easiest for me anyways. What the the code does is turns on GPIO 26 to ouput high. to create an input do this.

GPIO.setup(GPIO.BCM)
number = 37
GPIO.setup(number, GPIO.IN)
GPIO.input(number, True)

To create a bidrectional (or IO) I don't know. I am sorry but I can't answer that. Next you will need to look at this diagram to help you with your code. Also you should know to look for the diagram relavent to your raspberry pi.

Good luck and bye..

From: Noah

PS in case you are wondering the pinout above is for B+ the pinout below is for A.

My favorite reference for RasPi GPIO hardware and programming is the RasPi Hardware Wiki: http://elinux.org/RPi_Low-level_peripherals

It has programming examples in various languages, including Python: http://elinux.org/RPi_Low-level_peripherals#Python

The Wiki indicates that you need to "sudo" in order to access the GPIOs.  Most of the examples require "sudo" in some form because the /dev/mem device driver normally requires that you run as root.  For more information on this, see the Wiki and the element14 discussion: http://www.element14.com/community/message/60894/l/anyone-know-how-to-access-raspi-gpio-without-sudo#60894

HI Noah

I was just looking at this post as I am looking for assistance with getting a PI A+ board to run 4 Relays with multiple programs held on the SD Card on the PI board.

As well as a web page hosted on the board to access via the wifi dongle directly via iPone or Android to run the programs at the push of a button.

Can you possibly help or be able to point me in the right direction.

Craig