mirror of https://github.com/kidoman/embd
64 lines
1017 B
Go
64 lines
1017 B
Go
// Package watersensor allows interfacing with the water sensor
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package watersensor
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import (
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"sync"
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"github.com/golang/glog"
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"github.com/kidoman/embd"
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)
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type WaterSensor struct {
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Pin embd.DigitalPin
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initialized bool
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mu sync.RWMutex
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Debug bool
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}
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// New creates a new WaterSensor struct
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func New(pin embd.DigitalPin) *WaterSensor {
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return &WaterSensor{Pin: pin}
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}
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func (d *WaterSensor) setup() error {
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d.mu.RLock()
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if d.initialized {
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d.mu.RUnlock()
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return nil
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}
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d.mu.RUnlock()
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d.mu.Lock()
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defer d.mu.Unlock()
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if err := d.Pin.SetDirection(embd.In); err != nil {
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return err
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}
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d.initialized = true
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return nil
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}
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// IsWet determines if there is water present on the sensor
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func (d *WaterSensor) IsWet() (bool, error) {
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if err := d.setup(); err != nil {
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return false, err
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}
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if d.Debug {
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glog.Infof("watersensor: reading")
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}
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value, err := d.Pin.Read()
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if err != nil {
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return false, err
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}
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if value == embd.High {
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return true, nil
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} else {
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return false, nil
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}
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}
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