--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doorbell_to_mqtt.py	Sat Jan 21 21:59:14 2023 -0800
@@ -0,0 +1,60 @@
+import time
+import logging
+import sys
+import paho.mqtt.client as mqtt
+from pyfirmata import Arduino, INPUT
+
+PULLUP = 0x0b
+
+MIN_REPEAT_SEC = .5
+
+logging.basicConfig(level=logging.INFO)
+log = logging.getLogger()
+
+dev, = sys.argv[1:]
+
+client = mqtt.Client()
+client.will_set('doorbell/online', '0', qos=0, retain=False)
+client.connect('bang')
+
+log.info(f'connecting to {dev}')
+# note that I set StandardFirmata to double baud rate
+board = Arduino(dev, baudrate=115200)
+log.info('done')
+
+pin = board.get_pin('d:2:i')
+pin.mode = PULLUP  # config msg to send to firmata
+pin._mode = INPUT  # fake value so pyfirmata still reads this pin
+
+log.info('running mqtt client')
+client.loop_start()
+log.info('done')
+
+client.publish('doorbell/online', '1')
+
+last_value = None
+last_edge = 0
+
+
+def on_press(t):
+    global last_edge
+    if t > last_edge + MIN_REPEAT_SEC:
+        log.info(f'press {t=}')
+        client.publish('doorbell/button', 'press')
+        log.info('published')
+    last_edge = t
+
+
+try:
+    while True:
+        now = time.time()
+        board.iterate()
+        value = pin.read()
+        if value == 0 and last_value == 1:
+            on_press(now)
+        last_value = value
+        client.loop()
+except Exception:
+    client.publish('doorbell/online', '0')
+    client.disconnect()
+    raise
\ No newline at end of file