Markus Pesch
3a090d190e
changes: - fix: read temperature values without daemon Add subcommand to read temperature values without starting the daemon - fix: implement measured value types Replace measured value types with constants - fix: add sensor pipelines Add functions which returns a channel with measured values - fix: filter measured values from a channel Add functions to filter measured values by sensor id or measured value types.
60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package sensor
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import (
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"fmt"
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"sync"
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"git.cryptic.systems/volker.raschek/flucky/pkg/internal/format"
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"git.cryptic.systems/volker.raschek/flucky/pkg/types"
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"git.cryptic.systems/volker.raschek/go-dht"
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uuid "github.com/satori/go.uuid"
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)
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// DHT22 is a sensor to measure humidity and temperature.
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type DHT22 struct {
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*types.Sensor
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mutex *sync.Mutex
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}
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// Read measured values
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func (dht22 *DHT22) Read() ([]*types.MeasuredValue, error) {
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// Lock multiple access
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dht22.mutex.Lock()
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defer dht22.mutex.Unlock()
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err := dht.HostInit()
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if err != nil {
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return nil, fmt.Errorf("Failed to initialize periph: %v", err)
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}
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dht, err := dht.NewDHT(dht22.GPIONumber, dht.Celsius, "")
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if err != nil {
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return nil, fmt.Errorf("Failed to initialize new DHT22 sensor: %v", err)
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}
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humidityValue, temperatureValue, err := dht.Read()
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if err != nil {
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return nil, fmt.Errorf("Read error: %v", err)
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}
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measuredValues := []*types.MeasuredValue{
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{
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ID: uuid.NewV4().String(),
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Value: float64(humidityValue),
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ValueType: types.Humidity,
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Date: format.FormatedTime(),
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SensorID: dht22.ID,
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},
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{
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ID: uuid.NewV4().String(),
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Value: float64(temperatureValue),
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ValueType: types.Temperature,
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Date: format.FormatedTime(),
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SensorID: dht22.ID,
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},
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}
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return measuredValues, nil
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}
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