ABC歌曲学字母－学英语字母及单词 vs FlightPlan!

学习字母的同时学习其对应音标 - 简单易操作，孩子容易跟随 - 简单而且有趣 用简单的单词做例子 边学歌曲边学ABC, 边玩游戏边学英语字母大小写和英语字母发音。 由外教录音，发音清晰标准！ 一共分为26课，建议每课学习时间为15～20分钟达到熟悉词汇发音及熟唱分段的字母歌！ 26个视频生动有趣学习字母。 ＊视频分为两个部分： 第一部分为外教带读，读音包含字母读音以及所对应的音标发音 第二部分为字母歌，读音包含单词发音以及对应音标发音 通过动听的歌曲以及视频来学习，小朋友一定不会觉得枯燥无味。 通过手写板练习字母正确笔画书写，听说读写一个不落。 通过连连看游戏学习字母大小写，简单易学容易上手 自然拼读法则可以让小朋友养成拼读习惯，在学习其它单词的时候一样可以发出标准的读音。

This app allows you to visually program a flight plan for the Tello Drone and then upload it to the drone for execution. You can also fly the drone manually with the app if you wish. Real time telemetry from the drone is displayed on the glass cockpit. Tello is a mini drone equipped with a HD camera that is manufactured by Ryze Robotics and includes a flight controller with DJI smarts. We access the Tello API by connecting to the airframe via a WiFi UDP port. Once a connection is in place, the drone is controlled using simple text commands. So before using the app, make sure that your Tello drone is on and the iPhone is connected to the Tello WiFi. You can check this by going to Settings -> WiFi. The first time that you use the app it will request your permission to use Location Services. This is required to allow the app to determine the SSID of the WiFi connection so we know when you are connected to the drone. The app doesn't use location services for anything else. The app has two modes of operation: manual and planning / auto pilot. The app status is shown in the top centre panel. This panel also indicates whether WiFi is connected or not. It may take a few seconds for a change in WiFi status to be displayed.  If you are connected to the Tello and in manual mode, then tapping the take off icon will cause the drone to auto take off and hover. Tapping land will auto land. Only tap emergency stop if necessary as it will immediately stop all four motors and the drone will fall out of the sky! Tapping the plan button toggles the app state between planning mode and manual mode. In planning mode a grid (representing the ground) and yellow arrow (representing the drone), will appear. The arrow direction indicates the front of the drone. In planning mode, you can enter the sequence of commands which will be transmitted to your drone for execution. Start with take off or you will receive a warning message. When you are finished with your flight plan tap land. The arrow will simulate the position of the drone but is not to scale. Tapping the upload icon will send your flight plan to the Tello and execute it. While the plan is being flown, the app will display the glass cockpit. Real time telemetry from the drone is displayed on the glass cockpit. This includes pitch, roll, yaw, velocity (x, y, z), temperature, time of flight (tof), height, battery percentage, motor on time, barometric pressure, and acceleration (x, y, z). A full description of how the app operates is provided at our website (reefwing.com.au). FlightPlan is a refined version of another that I described in an article called "Programming the Tello Drone using Swift." (https://medium.com/@reefwing/programming-the-tello-drone-using-swift-f9122fd4aeb8?). You can refer to this article to understand how the app operates and create your own version.