Hello!
I am working on a home automation project in Go.
One of the components is polling all the sensors in a HUE bridge (this is
some LED lighting system with smart lamps and buttons).
I am wanting to make a map, keyed on int to "Sensor" objects. These objects
are located in a sensors package (so: sensors.Sensor).
My noob feeling says to do it like this:
var previousSensorInfo map[int]sensors.Sensor = make(map[int]sensors.Sensor)
but the compiler says:
*src/github.com/cpo/events/bridges/hue/hue.go:91:40: sensors.Sensor
undefined (type *sensors.Sensors has no field or method Sensor)*
(this is the line indicated above)
This sensors.Sensor type is a simple struct:
type Sensor struct {
ID int `json:"id,omitempty"`
Name string `json:"name"`
State State `json:"state,omitempty"`
Config Config `json:"config,omitempty"`
Type string `json:"type,omitempty"`
ModelID string `json:"modelid,omitempty"`
SWVersion string `json:"swversion,omitempty"`
ManufacturerName string `json:"manufacturername,omitempty"`
UniqueID string `json:"uniqueid,omitempty"`
}
The full code reads:
func (hue *HueBridge) pollSensors(sensors *sensors.Sensors) {
var previousSensorInfo map[int]sensors.Sensor = make(map[int]sensors.Sensor)
for true {
logger.Printf("Polling sensors")
sensorInfo, err := sensors.GetAllSensors()
if err == nil {
if previousSensorInfo == nil {
// first call
logger.Printf("Got %d sensors", len(sensorInfo))
for _, sensor := range sensorInfo {
previousSensorInfo[sensor.ID] = &sensor
}
} else {
// diff the two
for _, sensor := range sensorInfo {
prevSensor, found := previousSensorInfo[sensor.ID]
if found {
if hue.diffSensor(prevSensor, sensor) {
logger.Printf(" Previous: %s", prevSensor)
logger.Printf(" Now : %s", sensor)
}
} else {
logger.Printf("New sensor: %d", sensor.ID)
}
previousSensorInfo[sensor.ID] = sensor
}
}
}
time.Sleep(1 * time.Second)
}
}
What is going on here?
Regards,
Chris
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