Source code for juham_shelly.shellyplus1
import json
from typing import Any, cast
from typing_extensions import override
from masterpiece.mqtt import MqttMsg
from .shelly import Shelly
[docs]
class ShellyPlus1(Shelly):
"""Automation class for controlling Shelly Wifi relay. Subscribes to
'power' topic and controls the Shelly relay accordingly.
"""
power_topic = "power" # Juham topic to listen
shelly_relay_command = "/command/switch:0" # Shelly specific relay to control
def __init__(self, name: str, unit: str, relay: str) -> None:
"""Create automation for controlling the given
Args:
name (str): name of this node
unit (str): unit to listen for power input
relay (str) : Mqtt prefix of the shelly relay to be controlled
"""
super().__init__(name)
self.relay_topic_out = f"{relay}{self.shelly_relay_command}"
self.current_relay_state: int = -1
self.power_topic_in = self.make_topic_name(self.power_topic)
self.unit = unit
[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"] == self.unit:
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_topic_out, relay, 1, False)
self.info(f"{self.name} {m['Unit']} state changed to {relay}")