def get_data_from_web(self):
logger.debug("Retrieve data from web.")
try:
content = urllib2.urlopen(WEATHER_URL, timeout=5)
last_line = content.readlines()[-1].split()
wind_speed = float(last_line[7])
outside_temp = float(last_line[2])
except (ValueError, IOError, urllib2.HTTPError, urllib2.URLError):
logger.error(
"Unable to get data from the website. Reading previous value from the DB."
)
with db.session_scope() as session:
wind_speed, outside_temp = session.query(
db.History.wind_speed, db.History.outside_temp).order_by(
desc(db.History.id)).first()
if outside_temp != self._outside_temp:
socketio_client.send({
"event": "misc",
"message": {
"outside_temp": outside_temp
}
})
self._outside_temp = outside_temp
self._wind_speed = wind_speed
return {"outside_temp": outside_temp, "wind_speed": wind_speed}
def _update_settings(self, name, value):
with db.session_scope() as session:
property_ = session.query(db.Settings).first()
setattr(property_, name, value)
if name == "cascade_time":
value /= 60
if name != "mode_switch_timestamp":
socketio_client.send({"event": "misc", "message": {name: value}})
def return_temp(self):
return_temp = self._read_temperature_sensor(cfg.sensors.in_id)
if return_temp != self._return_temp:
socketio_client.send({
"event": "misc",
"message": {
"return_temp": return_temp
}
})
self._return_temp = return_temp
return return_temp
def water_out_temp(self):
water_out_temp = self._read_temperature_sensor(cfg.sensors.out_id)
if water_out_temp != self._water_out_temp:
socketio_client.send({
"event": "misc",
"message": {
"water_out_temp": water_out_temp
}
})
self._water_out_temp = water_out_temp
return water_out_temp
def _send_socketio_message(self,
event=None,
status=None,
switched_timestamp=None,
manual_override=None):
if switched_timestamp:
switched_timestamp = switched_timestamp.strftime("%B %d, %I:%M %p")
socketio_client.send({
"event": event,
"message": {
"status": status,
"device": self.number,
"switched_timestamp": switched_timestamp,
"manual_override": manual_override
}
})
def read_modbus_data(self):
boiler_stats = {
"system_supply_temp": 0,
"outlet_temp": 0,
"inlet_temp": 0,
"flue_temp": 0,
"cascade_current_power": 0,
"lead_firing_rate": 0
}
for i in range(1, 4):
try:
with modbus_session() as modbus:
# Read one register from 40006 address
# to get System Supply Temperature
# Memory map for the boiler is here on page 8:
# http://www.lochinvar.com/_linefiles/SYNC-MODB%20REV%20H.pdf
hregs = modbus.read_holding_registers(6,
count=1,
unit=cfg.modbus.unit)
# Read 9 registers from 30003 address
iregs = modbus.read_input_registers(3,
count=9,
unit=cfg.modbus.unit)
boiler_stats = {
"system_supply_temp":
c_to_f(hregs.getRegister(0) / 10.0),
"outlet_temp": c_to_f(iregs.getRegister(5) / 10.0),
"inlet_temp": c_to_f(iregs.getRegister(6) / 10.0),
"flue_temp": c_to_f(iregs.getRegister(7) / 10.0),
"cascade_current_power": float(iregs.getRegister(3)),
"lead_firing_rate": float(iregs.getRegister(8))
}
except (AttributeError, IndexError):
logger.warning(
"Attempt {}. Modbus answer is empty, retrying.".format(i))
time.sleep(1)
except (OSError, ModbusException, serial.SerialException):
logger.exception("Cannot connect to modbus")
break
else:
logger.info("Attempt {}. {}".format(i, boiler_stats))
break
else:
logger.error("Couldn't read modbus stats")
self._update_value_in_db(**boiler_stats)
socketio_client.send({"event": "misc", "message": boiler_stats})
def baseline_setpoint(self):
wind_chill = int(round(self.outside_temp))
if wind_chill < 11:
baseline_setpoint = 100
else:
with db.session_scope() as session:
baseline_setpoint, = session.query(
db.SetpointLookup.setpoint).filter(
db.SetpointLookup.wind_chill == wind_chill).first()
if baseline_setpoint != self._baseline_setpoint:
socketio_client.send({
"event": "misc",
"message": {
"baseline_setpoint": baseline_setpoint
}
})
self._baseline_setpoint = baseline_setpoint
return baseline_setpoint
def effective_setpoint(self):
"Calculate setpoint from wind_chill."
if self.mode in (WINTER, TO_WINTER):
effective_setpoint = (self.tha_setpoint +
self.setpoint_offset_winter)
elif self.mode in (SUMMER, TO_SUMMER):
effective_setpoint = (self.tha_setpoint +
self.setpoint_offset_summer)
effective_setpoint = self._constrain_effective_setpoint(
effective_setpoint)
if effective_setpoint != self._effective_setpoint:
socketio_client.send({
"event": "misc",
"message": {
"effective_setpoint": effective_setpoint
}
})
self._effective_setpoint = effective_setpoint
return effective_setpoint
def tha_setpoint(self):
if self.wind_chill_avg < 71:
temperature_history_adjsutment = 0
else:
with db.session_scope() as session:
temperature_history_adjsutment, = session.query(
db.SetpointLookup.setpoint_offset).filter(
db.SetpointLookup.avg_wind_chill ==
self.wind_chill_avg).first()
tha_setpoint = self.baseline_setpoint - temperature_history_adjsutment
if tha_setpoint != self._tha_setpoint:
socketio_client.send({
"event": "misc",
"message": {
"tha_setpoint": tha_setpoint
}
})
self._tha_setpoint = tha_setpoint
return tha_setpoint
