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handle serial port unavailable
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1 changed files with 6 additions and 1 deletions
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@ -17,7 +17,12 @@ class AirQualityMonitor:
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SERIAL_DEVICE = os.environ.get("SERIAL_DEVICE", "/dev/ttyUSB0")
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def __init__(self):
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self.ser = serial.Serial(self.SERIAL_DEVICE)
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# if path does not exist, error and exit
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if not os.path.exists(self.SERIAL_DEVICE):
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raise RuntimeError(f"Serial device {self.SERIAL_DEVICE} not found.")
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else:
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print(f"Serial device {self.SERIAL_DEVICE} found.")
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self.ser = serial.Serial(self.SERIAL_DEVICE)
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def get_measurement(self):
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"""Fetches a measurement from the sensor and returns it."""
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