ha-kiosk-agent/src/sensor.py

import logging
import psutil
import socket
import subprocess
import time

from enum import Enum

import ha_mqtt_discoverable
import ha_mqtt_discoverable.sensors

from device import Device
from paho.mqtt.client import Client, MQTTMessage


class BatterySensor():
    charging_status = False
    level = -1

    charging_entity = None
    level_entity = None

    def __init__(self, device: Device):
        # Battery charging
        battery_charging_info = ha_mqtt_discoverable.sensors.BinarySensorInfo(
            name="Battery charging",
            device=device.get_mqtt_device(),
            unique_id=f'{device.get_device_id()}_battery_charging',
            device_class='battery_charging')
        battery_charging_settings = ha_mqtt_discoverable.Settings(mqtt=device.get_mqtt_settings(), entity=battery_charging_info, manual_availability=True)
        self.charging_entity = ha_mqtt_discoverable.sensors.BinarySensor(battery_charging_settings)
        self.charging_entity.set_availability(True)

        # Battery level
        battery_level_info = ha_mqtt_discoverable.sensors.SensorInfo(
            name="Battery Level",
            device=device.get_mqtt_device(),
            unique_id=f'{device.get_device_id()}_battery_level',
            device_class='battery',
            unit_of_measurement='%')
        battery_level_settings = ha_mqtt_discoverable.Settings(mqtt=device.get_mqtt_settings(), entity=battery_level_info, manual_availability=True)
        self.level_entity = ha_mqtt_discoverable.sensors.Sensor(battery_level_settings)
        self.level_entity.set_availability(True)

    def update_value(self):
        blevel = psutil.sensors_battery()
        if not blevel:
            logger.warn(f'failed to get battery state')
            return

        if self.charging_status != blevel.power_plugged:
            if blevel.power_plugged:
                self.charging_entity.on()
            else:
                self.charging_entity.off()

        newLevel = "{:.0f}".format(blevel.percent)
        if self.level != newLevel:
            self.level_entity.set_state(newLevel)

        self.charging_status = blevel.power_plugged
        self.level = newLevel


class DisplayBrightnessSensor():
    value = -1
    mqtt_sensor = None

    def __init__(self, device: Device):
        display_brightness_info = ha_mqtt_discoverable.sensors.NumberInfo(
            name="Display Brightness",
            min=0,
            max=100,
            mode="slider",
            device=device.get_mqtt_device(),
            unique_id=f'{device.get_device_id()}_display_brightness',
            unit_of_measurement='%')
        display_brightness_settings = ha_mqtt_discoverable.Settings(mqtt=device.get_mqtt_settings(), entity=display_brightness_info, manual_availability=True)
        self.mqtt_sensor = ha_mqtt_discoverable.sensors.Number(display_brightness_settings, self.display_brightness_callback)
        self.mqtt_sensor.set_availability(True)

    def update_value(self):
        res = subprocess.run(['light', '-G'], capture_output=True)
        if res.returncode != 0:
            logger.warn(f'failed to get brightness: exit code { res.returncode }')
            return

        brightPerc = float(res.stdout.decode("utf-8"))
        if brightPerc != self.value:
            self.mqtt_sensor.set_value(brightPerc)

        self.value = brightPerc

    def set_display_brightness(self, number: float):
        res = subprocess.run(['light', '-S', f'{ number }%'])
        if res.returncode != 0:
            logger.warn(f'failed to set brightness: exit code { res.returncode }')

    # To receive number updates from HA, define a callback function:
    def display_brightness_callback(self, client: Client, user_data, message: MQTTMessage):
        number = int(message.payload.decode())
        logging.info(f"received new value {number} for display brightness")
        self.set_display_brightness(number)
        self.mqtt_sensor.set_value(number)


class IPAddressSensor():
    value = ""
    mqtt_sensor = None

    def __init__(self, device: Device):
        ip_address_info = ha_mqtt_discoverable.sensors.SensorInfo(
            name="IP Address",
            device=device.get_mqtt_device(),
            unique_id=f'{device.get_device_id()}_ip_address')
        ip_address_settings = ha_mqtt_discoverable.Settings(mqtt=device.get_mqtt_settings(), entity=ip_address_info, manual_availability=True)
        self.mqtt_sensor = ha_mqtt_discoverable.sensors.Sensor(ip_address_settings)
        self.mqtt_sensor.set_availability(True)

    def update_value(self):
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        s.settimeout(0)
        try:
            # doesn't even have to be reachable
            s.connect(('10.254.254.254', 1))
            IP = s.getsockname()[0]
        except Exception:
            IP = '127.0.0.1'
        finally:
            s.close()

        if IP != self.value:
            self.mqtt_sensor.set_state(IP)

        self.value = IP


class TemperatureSensor():
    value = -1
    mqtt_sensor = None

    def __init__(self, device: Device):
        temperature_info = ha_mqtt_discoverable.sensors.SensorInfo(
            name="Temperature",
            device=device.get_mqtt_device(),
            unique_id=f'{device.get_device_id()}_temperature',
            device_class='temperature',
            unit_of_measurement='°C')
        temperature_settings = ha_mqtt_discoverable.Settings(mqtt=device.get_mqtt_settings(), entity=temperature_info, manual_availability=True)
        self.mqtt_sensor = ha_mqtt_discoverable.sensors.Sensor(temperature_settings)
        self.mqtt_sensor.set_availability(True)

    def update_value(self):
        temp = psutil.sensors_temperatures()
        if not temp or not temp['acpitz']:
            logger.warn(f'failed to get temperature')
            return

        newValue = "{:.1f}".format(temp['acpitz'][0].current)
        if newValue != self.value:
            self.mqtt_sensor.set_state(newValue)

        self.value = newValue