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detect too many errors and shutdown

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This commit is contained in:
Andrew de Quincey 2021-05-01 15:37:30 +01:00
parent 74a4aa3770
commit c955c1f595
1 changed files with 17 additions and 1 deletions
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18
lib/oven.py
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@ -97,6 +97,9 @@ class TempSensorReal(TempSensor):
def __init__(self): def __init__(self):
TempSensor.__init__(self) TempSensor.__init__(self)
self.sleeptime = self.time_step / float(config.temperature_average_samples) self.sleeptime = self.time_step / float(config.temperature_average_samples)
self.bad_count = 0
self.ok_count = 0
self.bad_stamp = 0
if config.max31855: if config.max31855:
log.info("init MAX31855") log.info("init MAX31855")
@ -122,6 +125,12 @@ class TempSensorReal(TempSensor):
'''use a moving average of config.temperature_average_samples across the time_step''' '''use a moving average of config.temperature_average_samples across the time_step'''
temps = [] temps = []
while True: while True:
# reset error counter if time is up
if (time.time() - self.bad_stamp) > (self.time_step * 4):
self.bad_count = 0
self.ok_count = 0
self.bad_stamp = time.time()
temp = self.thermocouple.get() temp = self.thermocouple.get()
self.noConnection = self.thermocouple.noConnection self.noConnection = self.thermocouple.noConnection
self.shortToGround = self.thermocouple.shortToGround self.shortToGround = self.thermocouple.shortToGround
@ -136,8 +145,11 @@ class TempSensorReal(TempSensor):
temps.append(temp) temps.append(temp)
if len(temps) > config.temperature_average_samples: if len(temps) > config.temperature_average_samples:
del temps[0] del temps[0]
self.ok_count += 1
else: else:
log.error(f"Problem reading temp N/C:{self.noConnection} GND:{self.shortToGround} VCC:{self.shortToVCC} ???:{self.unknownError}") log.error(f"Problem reading temp N/C:{self.noConnection} GND:{self.shortToGround} VCC:{self.shortToVCC} ???:{self.unknownError}")
self.bad_count += 1
if len(temps): if len(temps):
self.temperature = sum(temps) / len(temps) self.temperature = sum(temps) / len(temps)
@ -218,7 +230,7 @@ class Oven(threading.Thread):
self.target = self.profile.get_target_temperature(self.runtime) self.target = self.profile.get_target_temperature(self.runtime)
def reset_if_emergency(self): def reset_if_emergency(self):
'''reset if the temperature is way TOO HOT''' '''reset if the temperature is way TOO HOT, or other critical errors detected'''
if (self.board.temp_sensor.temperature + config.thermocouple_offset >= if (self.board.temp_sensor.temperature + config.thermocouple_offset >=
config.emergency_shutoff_temp): config.emergency_shutoff_temp):
log.info("emergency!!! temperature too high, shutting down") log.info("emergency!!! temperature too high, shutting down")
@ -232,6 +244,10 @@ class Oven(threading.Thread):
log.info("emergency!!! unknown thermocouple error, shutting down") log.info("emergency!!! unknown thermocouple error, shutting down")
self.reset() self.reset()
if self.board.temp_sensor.bad_count / (self.board.temp_sensor.bad_count + self.board.temp_sensor.ok_count) > 0.3:
log.info("emergency!!! too many errors in a short period, shutting down")
self.reset()
def reset_if_schedule_ended(self): def reset_if_schedule_ended(self):
if self.runtime > self.totaltime: if self.runtime > self.totaltime:
log.info("schedule ended, shutting down") log.info("schedule ended, shutting down")