From d72442042b34712ce51797ac8b0fb036450403d6 Mon Sep 17 00:00:00 2001
From: Ladislav Prskavec <ladislav@prskavec.net>
Date: Sun, 12 Aug 2018 11:27:43 +0200
Subject: [PATCH] tello: add example with keyboard

---
 examples/tello_keyboard.go | 97 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 examples/tello_keyboard.go

diff --git a/examples/tello_keyboard.go b/examples/tello_keyboard.go
new file mode 100644
index 00000000..29d7121e
--- /dev/null
+++ b/examples/tello_keyboard.go
@@ -0,0 +1,97 @@
+// +build example
+//
+// Do not build by default.
+
+/*
+How to run:
+Connect to the drone's Wi-Fi network from your computer. It will be named something like "TELLO-XXXXXX".
+
+Once you are connected you can run the Gobot code on your computer to control the drone.
+
+	go run examples/tello_keyboard.go
+*/
+
+package main
+
+import (
+	"fmt"
+
+	"gobot.io/x/gobot"
+	"gobot.io/x/gobot/platforms/dji/tello"
+	"gobot.io/x/gobot/platforms/keyboard"
+)
+
+func resetDronePostion(drone *tello.Driver) {
+	drone.Forward(0)
+	drone.Backward(0)
+	drone.Up(0)
+	drone.Down(0)
+	drone.Left(0)
+	drone.Right(0)
+	drone.Clockwise(0)
+}
+
+func main() {
+	drone := tello.NewDriver("8888")
+	keys := keyboard.NewDriver()
+
+	keys.On(keyboard.Key, func(data interface{}) {
+		key := data.(keyboard.KeyEvent)
+		switch key.Key {
+		case keyboard.A:
+			fmt.Println(key.Char)
+			drone.Clockwise(-25)
+		case keyboard.D:
+			fmt.Println(key.Char)
+			drone.Clockwise(25)
+		case keyboard.W:
+			fmt.Println(key.Char)
+			drone.Forward(20)
+		case keyboard.S:
+			fmt.Println(key.Char)
+			drone.Backward(20)
+		case keyboard.K:
+			fmt.Println(key.Char)
+			drone.Down(20)
+		case keyboard.J:
+			fmt.Println(key.Char)
+			drone.Up(20)
+		case keyboard.Q:
+			fmt.Println(key.Char)
+			drone.Land()
+		case keyboard.P:
+			fmt.Println(key.Char)
+			drone.TakeOff()
+		case keyboard.ArrowUp:
+			fmt.Println(key.Char)
+			drone.FrontFlip()
+		case keyboard.ArrowDown:
+			fmt.Println(key.Char)
+			drone.BackFlip()
+		case keyboard.ArrowLeft:
+			fmt.Println(key.Char)
+			drone.LeftFlip()
+		case keyboard.ArrowRight:
+			fmt.Println(key.Char)
+			drone.RightFlip()
+		case keyboard.Escape:
+			resetDronePostion(drone)
+		}
+	})
+
+	var flightData *tello.FlightData
+	work := func() {
+		drone.On(tello.FlightDataEvent, func(data interface{}) {
+			flightData = data.(*tello.FlightData)
+			fmt.Println("Height:", flightData.Height)
+		})
+	}
+
+	robot := gobot.NewRobot("tello",
+		[]gobot.Connection{},
+		[]gobot.Device{keys, drone},
+		work,
+	)
+
+	robot.Start()
+}