Level 1.1

OVERVIEW

In this lesson we will cover how to use Tello Edu app simulator to navigate to a landing pad, land and return to a escape gate. In the navigation block, "motion" commands are useful to navigate Tello in three dimensions.

CODING

Tello Edu app provides a range of blocks that control Tello's flight behaviour. In this lesson we are going to introduce a few fundamental blocks and then it will not be long before you are programming much more advanced missions.

Each block can be executed individually or in a group known as a program or mission. We will be concentrating on the "Level 1.1" mission which will consist of four blocks:

• Takeoff
• Forward
• Back
• land

When issuing a takeoff command you will find that Tello will generally climb to an altitude of 1 meter. One important thing to consider is that Tello does not have GPS like many of the more advanced drones. Therefore, you may find that the accuracy of Tello is not consistently precise. Tello uses sensors and flight control logic to determine its altitude and distance.

After taking off, Tello Edu will issue the next command and send it to Tello's flight controller. This is considered sequential logic, where each block is executed in a specified order.

Your Tello Edu script should look similar to Figure 2.