Source code for caspia.gateway.services.sensors.carbondioxide.scd30

from caspia.gateway.services import GatewayService
from caspia.meadow.client import characteristic_read_handler, characteristic_write_handler
from caspia.meadow.errors import SensorFailureError
from caspia.meadow.services import CarbonDioxideSensorBase, Characteristic
from caspia.node.components.sensors.scd30 import SCD30Sensor


class SCD30CarbonDioxideSensor(GatewayService, CarbonDioxideSensorBase):
    auto_discovery = False

    self_calibration_enabled = Characteristic('boolean', 'W')

    def configure(self):
        self.scd30_c = self.network.get_configured_component(self.get_node(), SCD30Sensor,
                                                             self.config['scd30'])

    @property
    def is_updated_periodically(self):
        return self.config['scd30'].interval != 0

    @property
    def dependant_components(self):
        return {self.scd30_c}

    async def on_component_event(self, component, event):
        if self.scd30_c == component and isinstance(event, SCD30Sensor.MeasurementEvent):
            if not event.error:
                value = int(event.co2)
            else:
                value = SensorFailureError('sensor reported an error')
            await self.notify(self.level, value)

    @characteristic_read_handler('level')
    async def level_read(self, **kwargs):
        if not self.is_updated_periodically:
            await self.scd30_c.measure()
        if self.scd30_c.state.error:
            raise SensorFailureError('sensor reported an error')
        return int(self.scd30_c.state.co2)

    @characteristic_write_handler('self_calibration_enabled')
    async def self_calibration_enabled_write(self, value, **kwargs):
        await self.scd30_c.set_self_calibration_enabled(value)