1 files changed, 75 insertions, 0 deletions
diff --git a/include/py/homekit/soundsensor/node.py b/include/py/homekit/soundsensor/node.py
new file mode 100644
index 0000000..292452f
--- /dev/null
+++ b/include/py/homekit/soundsensor/node.py
@@ -0,0 +1,75 @@
+import logging
+import threading
+
+from typing import Optional
+from time import sleep
+from ..util import stringify, send_datagram, Addr
+
+from pyA20.gpio import gpio
+from pyA20.gpio import port as gpioport
+
+logger = logging.getLogger(__name__)
+
+
+class SoundSensorNode:
+    def __init__(self,
+                 name: str,
+                 pinname: str,
+                 server_addr: Optional[Addr],
+                 threshold: int = 1,
+                 delay=0.005):
+
+        if not hasattr(gpioport, pinname):
+            raise ValueError(f'invalid pin {pinname}')
+
+        self.pin = getattr(gpioport, pinname)
+        self.name = name
+        self.delay = delay
+        self.threshold = threshold
+
+        self.server_addr = server_addr
+
+        self.hits = 0
+        self.hitlock = threading.Lock()
+
+        self.interrupted = False
+
+    def run(self):
+        try:
+            t = threading.Thread(target=self.sensor_reader)
+            t.daemon = True
+            t.start()
+
+            while True:
+                with self.hitlock:
+                    hits = self.hits
+                    self.hits = 0
+
+                if hits >= self.threshold:
+                    try:
+                        if self.server_addr is not None:
+                            send_datagram(stringify([self.name, hits]), self.server_addr)
+                        else:
+                            logger.debug(f'server reporting disabled, skipping reporting {hits} hits')
+                    except OSError as exc:
+                        logger.exception(exc)
+
+                sleep(1)
+
+        except (KeyboardInterrupt, SystemExit) as e:
+            self.interrupted = True
+            logger.info(str(e))
+
+    def sensor_reader(self):
+        gpio.init()
+        gpio.setcfg(self.pin, gpio.INPUT)
+        gpio.pullup(self.pin, gpio.PULLUP)
+
+        while not self.interrupted:
+            state = gpio.input(self.pin)
+            sleep(self.delay)
+
+            if not state:
+                with self.hitlock:
+                    logger.debug('got a hit')
+                    self.hits += 1