kopia lustrzana https://github.com/botheredbybees/kilnController
104 wiersze
2.9 KiB
Python
104 wiersze
2.9 KiB
Python
import threading,time,random,datetime,logging
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log = logging.getLogger(__name__)
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try:
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from max31855 import MAX31855, MAX31855Error
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sensor_dummy = False
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except ImportError:
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log.warning("Could not initialize temperature sensor, using dummy values!")
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sensor_dummy = True
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class Oven (threading.Thread):
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STATE_IDLE = "IDLE"
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STATE_RUNNING = "RUNNING"
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STATE_ABORT = "ABORT"
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STATE_ERROR = "ERROR"
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def __init__(self):
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threading.Thread.__init__(self)
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self.daemon = True
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self.profile = None
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self.start_time = 0
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self.runtime = 0
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self.totaltime = 0
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self.power = 0.0
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self.state = Oven.STATE_IDLE
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self.temp_sensor = TempSensor(self)
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self.temp_sensor.start()
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self.start()
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def run_profile(self, profile):
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self.profile = profile
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self.totaltime = 300.0
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self.state = Oven.STATE_RUNNING
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self.start_time = datetime.datetime.now()
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log.info("Starting")
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def abort_run(self):
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self.state = Oven.STATE_ABORT
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def run(self):
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while True:
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if self.state == Oven.STATE_RUNNING:
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self.runtime = (datetime.datetime.now() - self.start_time).total_seconds()
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log.info("running at %.1f deg C, power %.2f (%.1fs/%.0f)"%(self.temp_sensor.temperature,self.power,self.runtime,self.totaltime))
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if self.temp_sensor.temperature < 250:
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self.power = 1.0
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else:
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self.power = 0.0
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if self.runtime >= self.totaltime:
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self.power = 0.0
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self.state = Oven.STATE_IDLE
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elif self.state == Oven.STATE_ABORT:
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self.power = 0.0
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self.state = Oven.STATE_IDLE
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time.sleep(1)
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def get_state(self):
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state = {
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'runtime': self.runtime,
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'temperature': self.temp_sensor.temperature,
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'state': self.state,
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'power': self.power,
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'totaltime': self.totaltime
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}
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return state
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class TempSensor(threading.Thread):
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def __init__(self,oven):
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threading.Thread.__init__(self)
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self.daemon = True
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self.temperature = 0
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self.oven = oven
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if not sensor_dummy:
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cs_pin = 27
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clock_pin = 22
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data_pin = 17
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units = "c"
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self.thermocouple = MAX31855(cs_pin, clock_pin, data_pin, units)
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def run(self):
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while True:
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if not sensor_dummy:
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self.temperature = self.thermocouple.get()
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else:
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time_delta = (20.0 - self.temperature)/40
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power_delta = 8.0*self.oven.power
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self.temperature += (time_delta+power_delta)
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time.sleep(1)
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if __name__ == "__main__":
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my_oven = Oven()
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my_oven.run_profile("abc")
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