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Modify relay .

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Modify the relay project , schematic and python code.
This commit is contained in:
Suhayl
2018-09-26 18:43:54 +08:00
parent db1f88c41b
commit 8dfa1647a9
2 changed files with 27 additions and 17 deletions
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Code/Python_Code/14.1.1_Relay/Relay.py
+27 -17
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@@ -3,35 +3,45 @@
# Filename : Relay.py
# Description : Button control Relay and Motor
# Author : freenove
# modification: 2018/08/02
# modification: 2018/09/26
########################################################################
import RPi.GPIO as GPIO
import time
relayPin = 11 # define the relayPin
buttonPin = 12 # define the buttonPin
relayState = False
debounceTime = 50
def setup():
print ('Program is starting...')
GPIO.setmode(GPIO.BOARD) # Numbers GPIOs by physical location
GPIO.setup(relayPin, GPIO.OUT) # Set relayPin's mode is output
GPIO.setup(buttonPin, GPIO.IN, pull_up_down=GPIO.PUD_UP) # Set buttonPin's mode is input, and pull up to high
GPIO.setup(buttonPin, GPIO.IN)
def buttonEvent(channel):
global relayState
print ('buttonEvent GPIO%d'%channel)
relayState = not relayState
if relayState :
print ('Turn on relay ... ')
else :
print ('Turn off relay ... ')
GPIO.output(relayPin,relayState)
def loop():
#Button detect
GPIO.add_event_detect(buttonPin,GPIO.FALLING,callback = buttonEvent,bouncetime=300)
relayState = False
lastChangeTime = long(round(time.time()*1000))
buttonState = GPIO.HIGH
lastButtonState = GPIO.HIGH
reading = GPIO.HIGH
while True:
pass
reading = GPIO.input(buttonPin)
if reading != lastButtonState :
lastChangeTime = long(round(time.time()*1000))
if ((long(round(time.time()*1000)) - lastChangeTime) > debounceTime):
if reading != buttonState :
buttonState = reading;
if buttonState == GPIO.LOW:
print("Button is pressed!")
relayState = not relayState
if relayState:
print("Turn on relay ...")
else :
print("Turn off relay ... ")
else :
print("Button is released!")
GPIO.output(relayPin,relayState)
lastButtonState = reading
def destroy():
GPIO.output(relayPin, GPIO.LOW) # relay off
@@ -41,6 +51,6 @@ if __name__ == '__main__': # Program start from here
setup()
try:
loop()
except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.
except KeyboardInterrupt:
destroy()