#import GPIO library
import RPi.GPIO as GPIO
#set GPIO numbering mode and define input pin
GPIO.setmode(GPIO.BOARD)
GPIO.setup(16,GPIO.IN)
try:
while True:
if GPIO.input(16)==0:
print "Open_16"
else:
print "Closed_16"
finally:
#cleanup the GPIO pins before ending
GPIO.cleanup()
how do i modify the above script to monitor 2 GPIO pins
16 is being monitored how to i monitor pin 16 and say pin 33
thanks for any help
#import GPIO library
import RPi.GPIO as GPIO
#set GPIO numbering mode and define input pin
GPIO.setmode(GPIO.BOARD)
GPIO.setup(16,GPIO.IN)
GPIO.setup(33,GPIO.IN)
try:
while True:
if GPIO.input(16)==0:
print "Open_16"
else:
print "Closed_16"
if GPIO.input(33)==0:
print "Open_33"
else:
print "Closed_33"
finally:
#cleanup the GPIO pins before ending
GPIO.cleanup()
If you want logical relations between the states of the two pins like AND, OR, XOR, ... use logical operators ( https://www.guru99.com/python-operators-complete-tutorial.html )
Related
Write this code with python3. But don't work. Only the relay comes on but it does not turn off.
I need this turn on and after 3 seconds to turn off.
This is my code:
import RPi.GPIO as GPIO
import time
channel = 23
# GPIO setup
GPIO.setmode(GPIO.BCM)
GPIO.setup(channel, GPIO.OUT)
def motor_on(pin):
GPIO.output(pin, GPIO.HIGH) # Turn motor on
def motor_off(pin):
GPIO.output(pin, GPIO.LOW) # Turn motor off
if __name__ == '__main__':
try:
motor_on(channel)
time.sleep(2)
motor_off(channel)
time.sleep(2)
GPIO.cleanup()
motor_on(channel)
time.sleep(2)
motor_off(channel)
time.sleep(2)
GPIO.cleanup()
except KeyboardInterrupt:
GPIO.cleanup()
There are a couple problems with your code in general -- the indentation at the end should be like this
try:
motor_on(channel)
time.sleep(2)
motor_off(channel)
time.sleep(2)
GPIO.cleanup()
motor_on(channel)
time.sleep(2)
motor_off(channel)
time.sleep(2)
GPIO.cleanup()
except KeyboardInterrupt:
GPIO.cleanup()
and as above, running motor_on() and motor_off() after GPIO.cleanup() will give you errors if you don't run GPIO.setmode() and GPIO.setup() again first -- but with those things fixed, your code works perfectly fine to turn an LED on and off, so there may be a problem with your circuit.
I would like to run my a function within my python program when the time is 7am. Almost like a when function when time == time:
I don't want to use cron because I want this to be internal function not executing the whole script
Here is my python script I have created:
#sprinkler.py file for sprinkler system
#this is the main file for the sprinklerOS
#functions to import for our test_run.py file
import RPi.GPIO as GPIO
import time
import argparse
import sys
import datetime
#how many zones the user/YOU have set up
zone_count = 10
#gpio pins on the raspberry pi for sprinkler system
pin = [12,7,16,11,18,13,22,15,32,29]
#set mode to board meaning the pin number on pi (1-40) instead of gpio number
GPIO.setmode(GPIO.BOARD)
GPIO.setwarnings(False)
#setting up all of the lights or relays as outputs(in a while loop)
for a in range(10):
GPIO.setup(pin[a],GPIO.OUT)
GPIO.output(pin[a], GPIO.LOW)
def run_sprinklers():
for b in range(zone_count):
run_time = 5
GPIO.output(pin[b], GPIO.HIGH)
time.sleep(run_time)
GPIO.output(pin[b], GPIO.LOW)
time.sleep(1)
I want to run_sprinklers() when the time is 7am
Thank you in advanced
As others have mentioned in the comments, cron is probably the best solution. However if this is a persistent process and you cannot rely on a tool like cron the schedule module, https://github.com/dbader/schedule, might be of interest to you.
import RPi.GPIO as GPIO
import time
import argparse
import sys
import datetime
import schedule
#how many zones the user/YOU have set up
zone_count = 10
#gpio pins on the raspberry pi for sprinkler system
pin = [12,7,16,11,18,13,22,15,32,29]
#set mode to board meaning the pin number on pi (1-40) instead of gpio number
GPIO.setmode(GPIO.BOARD)
GPIO.setwarnings(False)
#setting up all of the lights or relays as outputs(in a while loop)
for a in range(10):
GPIO.setup(pin[a],GPIO.OUT)
GPIO.output(pin[a], GPIO.LOW)
def run_sprinklers():
for b in range(zone_count):
run_time = 5
GPIO.output(pin[b], GPIO.HIGH)
time.sleep(run_time)
GPIO.output(pin[b], GPIO.LOW)
time.sleep(1)
schedule.every().day.at("7:00").do(run_sprinklers)
while True:
schedule.run_pending()
time.sleep(1)
I'm doing a project which I got to move two motors and they have differents movements. There are the codes:
import RPi.GPIO as GPIO ## Import GPIO library
import time ## Import 'time' library. Allows us to use 'sleep'
import sys
GPIO.setmode(GPIO.BOARD) ## Use board pin numbering
GPIO.setup(19, GPIO.OUT) ## Setup GPIO Pin 11(motor b enable) to OUT
GPIO.setup(16, GPIO.OUT) ## Setup GPIO Pin 11(motor a enable) to OUT
GPIO.setup(22, GPIO.OUT) ## Setup GPIO Pin 11(motor a control) to OUT
GPIO.setup(18, GPIO.OUT) ## Setup GPIO Pin 11(motor a control) to OUT
GPIO.setup(23, GPIO.OUT) ## Setup GPIO Pin 11(motor b control) to OUT
GPIO.setup(21, GPIO.OUT) ## Setup GPIO Pin 11(motor b control) to OUT
GPIO.output(16, False) ## disable motor a
GPIO.output(19, True) ## enable motor b
p=GPIO.PWM(19,50) ## frequency 50
p.start(1)
try:
while True:
GPIO.output(22, False) ## dont run motor a
GPIO.output(18, False) ## dont run motor a
GPIO.output(23, True) ## run motor b
GPIO.output(21, False) ## run motor b
p.ChangeDutyCycle(35) ## duty cycle 10%
except KeyboardInterrupt:
pass
p.stop()
GPIO.cleanup()
sys.exit()
Code #2
import RPi.GPIO as GPIO
from time import sleep
import sys
GPIO.setmode(GPIO.BOARD)
Motor1A = 22
Motor1B = 18
Motor1E = 16
Motor2A = 23
Motor2B = 21
Motor2E = 19
GPIO.setup(Motor1A,GPIO.OUT)
GPIO.setup(Motor1B,GPIO.OUT)
GPIO.setup(Motor1E,GPIO.OUT)
GPIO.setup(Motor2A,GPIO.OUT)
GPIO.setup(Motor2B,GPIO.OUT)
GPIO.setup(Motor2E,GPIO.OUT)
print "Going forwards"
GPIO.output(Motor1A,GPIO.HIGH)
GPIO.output(Motor1B,GPIO.LOW)
GPIO.output(Motor1E,GPIO.HIGH)
GPIO.output(Motor2A,GPIO.HIGH)
GPIO.output(Motor2B,GPIO.LOW)
GPIO.output(Motor2E,GPIO.HIGH)
sleep(2)
print "Now stop"
GPIO.output(Motor1E,GPIO.LOW)
GPIO.output(Motor2E,GPIO.LOW)
GPIO.cleanup()
sys.exit()
I want to mix both codes in one. I mean, convert these two codes in one which has two differents speed.
Or If someone knows another code I'll be very thankful
How do I do that?
Seriously, use gpiozero, it's a lot more fun and turns your code into:
from gpiozero import Motor
from time import sleep
motorA = Motor(22, 18) # your gpio pins go here
motorB = Motor(23, 21)
motorA.forward(0.5) # half speed
motorB.forward(0.5)
sleep(2) # wait 2 seconds before stopping the motors
motorA.stop()
motorB.stop()
Then, you can go a step further and use the Robot class instead (Documentation here), and make everything even easier:
from gpiozero import Robot
from time import sleep
robot = Robot(left=(22, 18), right=(23, 21))
robot.forward(1) # full speed
sleep(2)
robot.stop()
The robot class also has some more functions, for example:
robot.left()
robot.right()
Most likely, you'll have to install the library first if you haven't used it yet. Type the following on the terminal in order to do so.
pip install gpiozero
I have a problem with my code working with raspberry pi.
I just started with python so i need some help.
This is the code:
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
led1=22
led2=17
GPIO.setup(led1, GPIO.OUT)
GPIO.setup(led2, GPIO.OUT)
def blink():
GPIO.output(led1, 1)
time.sleep(1)
GPIO.output(led1, 0)
GPIO.output(led2, 1)
time.sleep(1)
GPIO.output(led2, 0)
while(blink):
blink()
try:
main()
except KeyboardInterrupt:
GPIO.cleanup()
when I run this error appear in the console:
RuntimeWarning: This channel is already in use, continuing anyway. Use
GPIO.setwarnings(False) to disable warnings. GPIO.setup(led1,
GPIO.OUT) and:
RuntimeWarning: This channel is already in use, continuing anyway. Use
GPIO.setwarnings(False) to disable warnings. GPIO.setup(led2,
GPIO.OUT)
If I understand correctly the command GPIO.cleanup() should reset all pin of GPIO port and turn off the led.
but this in not happening in fact one of the led remain on.
How can change my code to resolve this issue?
Here is a little help, how to effectively separate your functions, and make them more general. Although this is a working Python script I provided, I didn't tested it on my raspi, but I think it will work -- anyway, let me know if there were any problems!
import RPi.GPIO as GPIO
import time
# Module level constants
LED1 = 22
LED2 = 17
# Sets up pins as outputs
def setup(*leds):
GPIO.cleanup()
GPIO.setmode(GPIO.BCM)
for led in leds:
GPIO.setup(led, GPIO.OUT)
GPIO.output(led, GPIO.LOW)
# Turn on and off the leds
def blink(*leds):
# Blink all leds passed
for led in leds:
GPIO.output(led, GPIO.HIGH)
time.sleep(1)
GPIO.output(led, GPIO.LOW)
if __name__ == '__main__':
# Setup leds
setup(LED1, LED2)
# Run blinking forever
try:
while True:
blink(LED1, LED2)
# Stop on Ctrl+C and clean up
except KeyboardInterrupt:
GPIO.cleanup()
A friendly recommendation:
There is a dedicated Raspberry Pi StackExchange site too: https://raspberrypi.stackexchange.com/
You don't seem to have included main in your question. However the problem may occur if the programs exits for some reason other than KeyboardInterrupt. It's better to free the resource in a finally block
try:
main()
except KeyboardInterrupt:
pass
finally:
GPIO.cleanup()
You are calling main() function but it's not declared (defined), you are using while(blink). So You need to delete the "main()" and put the "Try" before your main function which is the while(blink) loop. Don't forget the proper tabs there.
I just bought a Raspberry Pi and I was playing around with an LED, trying to learn Python. So my setup is as follows: my led is is connected to the 7th PIN of my GPIO and to ground. I made the following code:
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BOARD)
GPIO.setup(7, GPIO.OUT)
GPIO.output(7, True)
time.sleep(10)
GPIO.output(7, False)
time.sleep(5)
GPIO.output(7, True)
When I ran this code, the LED blinks once for 10 seconds, turns off and nevers turns back on. What can be wrong?
Try this:
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BOARD)
GPIO.setup(7, GPIO.OUT)
while True:
GPIO.output(7, True)
time.sleep(10)
GPIO.output(7, False)
time.sleep(5)
It should loop the on/off sequence, causing the light to turn on for 10s, then turn off for 5s, and repeat.