76 lines
1.7 KiB
Go
76 lines
1.7 KiB
Go
package sensor
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import (
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"fmt"
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"time"
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"github.com/go-flucky/flucky/pkg/internal/format"
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"github.com/go-flucky/flucky/pkg/types"
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"github.com/go-flucky/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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}
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// GetID returns the sensor id
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func (s *DHT22) GetID() string {
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return s.ID
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}
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// GetTicker returns a new ticker, which tick every when the sensor should be read
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func (s *DHT22) GetTicker() *time.Ticker {
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duration, err := time.ParseDuration(s.TickDuration)
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if err != nil {
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duration = time.Minute
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}
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return time.NewTicker(duration)
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}
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// Read measured values
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func (s *DHT22) Read() ([]*types.MeasuredValue, error) {
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err := dht.HostInit()
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if err != nil {
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return nil, fmt.Errorf("HostInit error: %v", err)
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}
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gpio, err := types.GPIOToString(*s.GPIONumber)
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if err != nil {
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return nil, err
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}
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dht, err := dht.NewDHT(gpio, dht.Celsius, "")
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if err != nil {
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return nil, fmt.Errorf("NewDHT error: %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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&types.MeasuredValue{
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ID: uuid.NewV4().String(),
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Value: float64(humidityValue),
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ValueType: types.MeasuredValueTypeHumidity,
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FromDate: format.FormatedTime(),
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TillDate: format.FormatedTime(),
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SensorID: s.ID,
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},
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&types.MeasuredValue{
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ID: uuid.NewV4().String(),
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Value: float64(temperatureValue),
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ValueType: types.MeasuredValueTypeTemperature,
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FromDate: format.FormatedTime(),
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TillDate: format.FormatedTime(),
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SensorID: s.ID,
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},
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}
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return measuredValues, nil
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}
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