from dataclasses import dataclass
@dataclass
class OnOffThermostat:
setpoint: float
deadband: float
safety_high: float = 26.0
state: int = 0 # 0=OFF, 1=ON
def update(self, measured_temp: float) -> int:
''' Update the thermostat state based on the measured temperature.
If the measured temperature is below the lower threshold (setpoint - deadband/2),
the thermostat turns ON (state=1).
If the measured temperature is above the upper threshold (setpoint + deadband/2),
the thermostat turns OFF (state=0).
If the measured temperature exceeds the safety_high limit, the thermostat turns OFF.
Returns the current state (0=OFF, 1=ON).
'''
lower = self.setpoint - self.deadband / 2.0
upper = self.setpoint + self.deadband / 2.0
if measured_temp >= self.safety_high:
self.state = 0
return self.state
if measured_temp < lower:
self.state = 1
elif measured_temp > upper:
self.state = 0
return self.state
