Source code for juham.automation.rboiler
import json
from typing import Any, cast
from typing_extensions import override
from juham.base.jmqtt import JMqtt
from juham.shelly import JShelly
from juham.base import MqttMsg
[docs]
class RBoiler(JShelly):
"""Automation class for controlling Shelly Wifi relay. Subscribes to
'power' topic and controls the Shelly relay accordingly.
"""
power_topic = "power" # topic to listen
relay_url = "shellyplus1-alakerta/command/switch:0" # relay to control
def __init__(self, name: str = "rboiler") -> None:
super().__init__(name)
self.current_relay_state: int = 0
self.power_topic_in = self.make_topic_name(self.power_topic)
[docs]
@override
def on_connect(self, client: object, userdata: Any, flags: int, rc: int) -> None:
super().on_connect(client, userdata, flags, rc)
if rc == 0:
self.subscribe(self.power_topic_in)
[docs]
@override
def on_message(self, client: object, userdata: Any, msg: MqttMsg) -> None:
if msg.topic == self.power_topic_in:
self.on_power(json.loads(msg.payload.decode()))
else:
super().on_message(client, userdata, msg)
[docs]
def on_power(self, m: dict[str, str]) -> None:
"""Process power_topic message.
Args:
m (dict): holding data from the power sensor
"""
if "Unit" in m and m["Unit"] == "main_boiler":
new_state = cast(int, m["State"])
if new_state != self.current_relay_state:
self.current_relay_state = new_state
if new_state == 0:
relay = "off"
else:
relay = "on"
self.publish(self.relay_url, relay, 1)
self.info(m["Unit"] + " state: " + relay, self.relay_url)
else:
self.info(
m["Unit"] + " Relay state " + str(new_state) + " not changed", ""
)