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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
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