added water sensor sample

samples/watersensor.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"log"
+	"time"
+
+	"github.com/kid0m4n/go-rpi/sensor/watersensor"
+)
+
+func main() {
+	fluidSensor := watersensor.New(7)
+
+	for {
+		isWater, err := fluidSensor.IsWet()
+		if err != nil {
+			log.Panic(err)
+		}
+        if isWater {
+		log.Printf("Bot is dry")
+        } else {
+		log.Printf("Bot is Wet")
+        }
+		time.Sleep(500 * time.Millisecond)
+	}
+}

sensor/us020/us020.go

@@ -84,7 +84,7 @@ func (d *us020) Distance() (distance float64, err error) {
 	}
 
 	if d.debug {
-		log.Print("trigetting pulse")
+		log.Print("trigerring pulse")
 	}
 
 	// Generate a TRIGGER pulse