93 lines
2.1 KiB
Go
93 lines
2.1 KiB
Go
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package gpio
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import "github.com/hybridgroup/gobot"
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// RelayDriver represents a digital relay
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type RelayDriver struct {
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pin string
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name string
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connection DigitalWriter
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high bool
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gobot.Commander
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}
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// NewRelayDriver return a new RelayDriver given a DigitalWriter, name and pin.
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//
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// Adds the following API Commands:
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// "Toggle" - See RelayDriver.Toggle
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// "On" - See RelayDriver.On
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// "Off" - See RelayDriver.Off
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func NewRelayDriver(a DigitalWriter, name string, pin string) *RelayDriver {
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l := &RelayDriver{
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name: name,
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pin: pin,
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connection: a,
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high: false,
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Commander: gobot.NewCommander(),
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}
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l.AddCommand("Toggle", func(params map[string]interface{}) interface{} {
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return l.Toggle()
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})
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l.AddCommand("On", func(params map[string]interface{}) interface{} {
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return l.On()
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})
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l.AddCommand("Off", func(params map[string]interface{}) interface{} {
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return l.Off()
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})
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return l
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}
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// Start implements the Driver interface
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func (l *RelayDriver) Start() (errs []error) { return }
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// Halt implements the Driver interface
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func (l *RelayDriver) Halt() (errs []error) { return }
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// Name returns the RelayDrivers name
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func (l *RelayDriver) Name() string { return l.name }
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// Pin returns the RelayDrivers name
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func (l *RelayDriver) Pin() string { return l.pin }
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// Connection returns the RelayDrivers Connection
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func (l *RelayDriver) Connection() gobot.Connection {
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return l.connection.(gobot.Connection)
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}
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// State return true if the relay is On and false if the relay is Off
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func (l *RelayDriver) State() bool {
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return l.high
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}
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// On sets the relay to a high state.
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func (l *RelayDriver) On() (err error) {
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if err = l.connection.DigitalWrite(l.Pin(), 1); err != nil {
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return
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}
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l.high = true
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return
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}
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// Off sets the relay to a low state.
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func (l *RelayDriver) Off() (err error) {
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if err = l.connection.DigitalWrite(l.Pin(), 0); err != nil {
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return
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}
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l.high = false
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return
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}
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// Toggle sets the relay to the opposite of it's current state
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func (l *RelayDriver) Toggle() (err error) {
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if l.State() {
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err = l.Off()
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} else {
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err = l.On()
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}
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return
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}
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