gpio: display events in PIR detect example

Signed-off-by: deadprogram <ron@hybridgroup.com>

drivers/gpio/pir_motion_driver.go

@@ -1,7 +1,6 @@
 package gpio
 
 import (
-	"fmt"
 	"time"
 
 	"github.com/hybridgroup/gobot"
@@ -63,11 +62,12 @@ func (p *PIRMotionDriver) Start() (errs []error) {
 			if err != nil {
 				p.Publish(Error, err)
 			}
-			fmt.Println(newValue)
 			switch newValue {
 			case 1:
-				p.Active = true
-				p.Publish(MotionDetected, newValue)
+				if !p.Active {
+					p.Active = true
+					p.Publish(MotionDetected, newValue)
+				}
 			case 0:
 				if p.Active {
 					p.Active = false

examples/firmata_pir_motion.go

@@ -1,6 +1,8 @@
 package main
 
 import (
+	"fmt"
+
 	"github.com/hybridgroup/gobot"
 	"github.com/hybridgroup/gobot/drivers/gpio"
 	"github.com/hybridgroup/gobot/platforms/firmata"
@@ -14,9 +16,11 @@ func main() {
 
 	work := func() {
 		sensor.On(gpio.MotionDetected, func(data interface{}) {
+			fmt.Println(gpio.MotionDetected)
 			led.On()
 		})
 		sensor.On(gpio.MotionStopped, func(data interface{}) {
+			fmt.Println(gpio.MotionStopped)
 			led.Off()
 		})
 	}