Markus Pesch
fb8d4dd5eb
changes:
- Remove cli
Some cli commands are not complete tested and are deprecated.
- Daemon
- Old version has a very bad implementation of how to verify, if the
device or the sensors are in the database insert. The current
implementation can be improved but this one is betten then the old
one.
- Remove complete the cache store implementation. Use a normal array
and query the length and capacity to determine how the array cache
must be cleaned.
- Type
Remove unused types and functions
71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
package sensor
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"sync"
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uuid "github.com/satori/go.uuid"
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"github.com/volker-raschek/flucky/pkg/internal/format"
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"github.com/volker-raschek/flucky/pkg/types"
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)
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// DS18B20 is a sensor to measure humidity and temperature.
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type DS18B20 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 (ds18b20 *DS18B20) Read() ([]*types.MeasuredValue, error) {
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// Lock multiple access
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ds18b20.mutex.Lock()
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defer ds18b20.mutex.Unlock()
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if ds18b20.WireID == nil {
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return nil, fmt.Errorf("WireID is not specified")
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}
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socketPath := filepath.Join("/sys/bus/w1/devices", *ds18b20.WireID, "/w1_slave")
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if _, err := os.Stat(socketPath); os.IsNotExist(err) {
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return nil, fmt.Errorf("Socket path not found: %v", socketPath)
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}
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data, err := ioutil.ReadFile(socketPath)
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if err != nil {
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return nil, fmt.Errorf("Can not read data from sensor %v", ds18b20.Name)
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}
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raw := string(data)
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i := strings.LastIndex(raw, "t=")
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if i == -1 {
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return nil, errorReadData
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}
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c, err := strconv.ParseFloat(raw[i+2:len(raw)-1], 64)
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if err != nil {
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return nil, errorParseData
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}
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temperatureValue := c / 1000
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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(temperatureValue),
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ValueType: "temperature",
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FromDate: format.FormatedTime(),
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TillDate: format.FormatedTime(),
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SensorID: ds18b20.ID,
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},
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}
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return measuredValues, nil
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}
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