74 lines
1.7 KiB
Go
74 lines
1.7 KiB
Go
package microbit
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import (
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"bytes"
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"gobot.io/x/gobot"
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"gobot.io/x/gobot/platforms/ble"
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)
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// TemperatureDriver is the Gobot driver for the Microbit's built-in thermometer
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type TemperatureDriver struct {
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name string
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connection gobot.Connection
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gobot.Eventer
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}
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const (
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// BLE services
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temperatureService = "e95d6100251d470aa062fa1922dfa9a8"
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// BLE characteristics
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temperatureCharacteristic = "e95d9250251d470aa062fa1922dfa9a8"
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// Temperature event
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Temperature = "temperature"
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)
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// NewTemperatureDriver creates a Microbit TemperatureDriver
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func NewTemperatureDriver(a ble.BLEConnector) *TemperatureDriver {
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n := &TemperatureDriver{
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name: gobot.DefaultName("Microbit Temperature"),
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connection: a,
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Eventer: gobot.NewEventer(),
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}
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n.AddEvent(Temperature)
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return n
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}
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// Connection returns the BLE connection
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func (b *TemperatureDriver) Connection() gobot.Connection { return b.connection }
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// Name returns the Driver Name
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func (b *TemperatureDriver) Name() string { return b.name }
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// SetName sets the Driver Name
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func (b *TemperatureDriver) SetName(n string) { b.name = n }
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// adaptor returns BLE adaptor
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func (b *TemperatureDriver) adaptor() ble.BLEConnector {
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return b.Connection().(ble.BLEConnector)
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}
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// Start tells driver to get ready to do work
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func (b *TemperatureDriver) Start() (err error) {
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// subscribe to temperature notifications
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b.adaptor().Subscribe(temperatureCharacteristic, func(data []byte, e error) {
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var l int8
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buf := bytes.NewBuffer(data)
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val, _ := buf.ReadByte()
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l = int8(val)
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b.Publish(b.Event(Temperature), l)
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})
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return
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}
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// Halt stops Temperature driver (void)
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func (b *TemperatureDriver) Halt() (err error) {
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return
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}
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