def ScanPressed(pin):
global time_stamp # put in to debounce
global debounce
global PoweredOff
global Scanning
global Going
global camera
global ledPinScanning
global ledPinFoundQR
global bFoundQR
global commandString
time_now = time.time()
if (time_now - time_stamp) >= debounce and PoweredOff==False and Scanning==False and Going==False:
# Play a sound to show that we are scanning
audio.playSound(0)
# Flag that we are scanning
Scanning = True
print("Scan Button pressed")
# Call python script to try and find QR code from webcam image
GPIO.output(ledPinScanning, True) # Turn on the "Scanning" LED
GPIO.output(ledPinFoundQR, False) # Ensure Found QR LED OFF
# Try to find a QR code from the camera.
QRCode = qrscanner.FindQRCode(ledPinScanning, camera, 10)
if (QRCode != ""):
# Play sound that we found one
audio.playSound(10)
# Found a QR Code, Strip out the command portion of the string
commandString = parseQR.parseOutCommand(QRCode)
# Flag that we found a QR code
bFoundQR = True
# Ensure Found QR LED OFF
GPIO.output(ledPinFoundQR, True)
# Turn off the "Scanning" LED
GPIO.output(ledPinScanning, False)
Scanning = False
time_stamp = time_now
