Klingel-Sensor mit Arduino Nano und Python

klingel_sender_nano_serial/doorbell.py

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+# https://www.instructables.com/id/Arduino-Python-Communication-via-USB/
+import serial
+import urllib.request
+import logging
+
+logging.basicConfig(level=logging.INFO, format='%(asctime)s %(levelname)s - %(message)s')
+logging.info('Initializing')
+
+
+arduino = serial.Serial('/dev/ttyUSB0', 9600, timeout=.1)
+
+while True:
+    data = arduino.readline()[:-2] #the last bit gets rid of the new-line chars
+    if data:
+        data = data.decode('utf8')
+        if (data == 'RING'):
+            logging.info(data)
+            urllib.request.urlopen('http://192.168.178.51/bell/on')

klingel_sender_nano_serial/klingel_sender_nano_serial.ino

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+int ledPin = LED_BUILTIN;
+int buttonPin = 2; // Button connected to D2 and GND
+bool active = false;
+
+void setup() {
+  pinMode(ledPin, OUTPUT);
+  pinMode(buttonPin, INPUT_PULLUP);
+  Serial.begin(9600);
+  Serial.println("Starting doorbell sensor");
+}
+
+void loop() {
+  int val = digitalRead(buttonPin);
+  
+  if (val == LOW) {
+    delay(2); // catch flares
+    if (val == LOW && active == false) {
+      Serial.println("RING");
+      digitalWrite(ledPin, HIGH);
+      active = true;
+      delay(250);
+    }
+    else {
+      // Serial.println("flare");
+    }
+  }
+  else {
+    delay(2); // catch flares
+    if (val == HIGH) {
+      active = false;
+      digitalWrite(ledPin, LOW);
+    }
+  }
+  
+}