added adxl345 example

examples/firmata_adxl345.go

@@ -0,0 +1,43 @@
+// +build example
+//
+// Do not build by default.
+
+/*
+ How to run
+ Pass serial port to use as the first param:
+
+	go run examples/firmata_adxl345.go /dev/ttyACM0
+*/
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"gobot.io/x/gobot"
+	"gobot.io/x/gobot/drivers/i2c"
+	"gobot.io/x/gobot/platforms/firmata"
+)
+
+func main() {
+	firmataAdaptor := firmata.NewAdaptor(os.Args[1])
+	adxl345 := i2c.NewADXL345Driver(firmataAdaptor)
+
+	work := func() {
+		gobot.Every(100*time.Millisecond, func() {
+			x, y, z, _ := adxl345.XYZ()
+
+			fmt.Printf("x: %.7f | y: %.7f | z: %.7f \n", x, y, z)
+		})
+	}
+
+	robot := gobot.NewRobot("adxl345Bot",
+		[]gobot.Connection{firmataAdaptor},
+		[]gobot.Device{adxl345},
+		work,
+	)
+
+	robot.Start()
+}