class TsicSource(SignalSource):
"""
Temperature measurement signal source from TSIC 206/306 connected to GPIO.
"""
def __init__(self, identifier: str, pigpio_pi: pigpio, gpio_bcm: int,
**kwargs):
super().__init__(identifier, **kwargs)
try:
self.__gpio = gpio_bcm
self.tsic = TsicInputChannel(pigpio_pi, gpio_bcm)
except Exception as e:
logger.warning('Failed to initialize TSIC input channel: ' +
str(e))
# handle missing GPIO access for windows development
self.tsic = None
def start(self) -> None:
super().start()
if self.tsic is not None:
self.tsic.start(lambda m: self._send(round(m.degree_celsius, 3),
self.STATUS_OK))
def stop(self) -> None:
super().stop()
if self.tsic is not None:
self.tsic.stop()
def __repr__(self) -> str:
return super().__repr__() + ' bcm_gpio=' + str(self.__gpio)
def read_temp():
pi = pigpio.pi()
tsic = TsicInputChannel(pigpio_pi=pi, gpio=temperature_pin, tsic_type=TSIC306)
measurement = tsic.measure_once(timeout=1.0)
pi.stop()
if not (measurement == Measurement.UNDEF):
return measurement.degree_celsius
def read_temp():
pi = pigpio.pi()
tsic = TsicInputChannel(pigpio_pi=pi, gpio=pin, tsic_type=TSIC306)
measurement = tsic.measure_once(timeout=1.0)
pi.stop()
if measurement == Measurement.UNDEF:
return "-273.15"
else:
return f"{round(measurement.degree_celsius, 2)}"
def __init__(self, pigpio_pi, gpio_bcm, **kwargs):
super().__init__(**kwargs)
try:
self.__gpio = gpio_bcm
self.tsic = TsicInputChannel(pigpio_pi, gpio_bcm)
except Exception as e:
logger.warn('Failed to initialize TSIC input channel: ' + str(e))
# handle missing GPIO access for windows development
self.tsic = None
def __init__(self, gpio=4):
self._temperature: float = 0
self._lock = threading.Lock()
pi = pigpio.pi()
self.tsic = TsicInputChannel(pigpio_pi=pi,
gpio=gpio,
tsic_type=TSIC306)
self.tsic.start(self._store_measurement)
time.sleep(0.2)
class TemperatureReader(object):
def __init__(self, gpio=4):
self._temperature: float = 0
self._lock = threading.Lock()
pi = pigpio.pi()
self.tsic = TsicInputChannel(pigpio_pi=pi,
gpio=gpio,
tsic_type=TSIC306)
self.tsic.start(self._store_measurement)
time.sleep(0.2)
def get(self) -> float:
self._lock.acquire()
ret_temp = self._temperature
self._lock.release()
return ret_temp
def close(self):
self.tsic.stop()
def _store_measurement(self, measurement: Measurement):
self._lock.acquire()
self._temperature = round(measurement.degree_celsius)
self._lock.release()
"""
__author__ = 'Holger Fleischmann'
__copyright__ = 'Copyright 2019, Holger Fleischmann, Bavaria/Germany'
__license__ = 'Apache License 2.0'
import time
import pigpio
from tsic import TsicInputChannel, Measurement, TSIC306
# TsicInputChannel and ZacWireInputChannel require pigpio
# for GPIO access with precise timing:
pi = pigpio.pi()
tsic = TsicInputChannel(pigpio_pi=pi, gpio=17, tsic_type=TSIC306)
print('\nA. Single measurement:')
print(tsic.measure_once(timeout=1.0))
print('\nB. All measurements for 1 second:')
tsic.start(lambda measurement: print(measurement))
time.sleep(1)
tsic.stop()
print('\nC. One measurement per second for 3 seconds:')
# start receiving in a context:
with tsic:
for i in range(3):
time.sleep(1)