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====== How to Setup the Object Detection Demo ======

**Materials**:
  * Tello drone, ideally with multiples batteries
  * Jetson computer (Jetson Xavier NX is the current recommendation)
  * Screen, keyboard and mouse
  * Router

===== Preparing Router =====

In this case we are using the router [[https://www.asus.com/networking-iot-servers/wifi-routers/asus-wifi-routers/rt-ac51/ | ASUS model RT-AC51]]. You can get the manual from [[https://www.asus.com/us/supportonly/rt-ac51/helpdesk_manual/ | here]].

Check your router manual and configure the **SSID** and **PASSWORD** to connect to the network. In our case all the information is in labels stuck physically on the router.

===== Preparing Tello =====

Background information: The drone can be in two possible connection modes:
  * **Station Mode:** \\ The drone is the Access Point. It creates its own Wi-Fi network and provides its own SSID. The client (the Jetson computer) connects to the drone's SSID directly.
  * **Access Point Mode:** \\ The drone connects to an existing Wi-Fi access point (AP, SSID) as a client. The Jetson connects to the same SSID. 

| {{ :drones:mini_drones:tello-station-mode.png?400 |}} |
^ Station mode  ^

| {{ :drones:mini_drones:tello-access-point-mode.png?400 |}}   |
^ Access Point mode  ^

==== Set Mode using the Tello CLI ====

  - Download and install the [[https://github.com/harleylara/tello-js | tello-js]] package. This package includes a ''CLI'' tool that allows you to configure the drone.
  - Reset the Tello's Wi-Fi to factory configuration. To do so **press and hold the power button for 5 seconds**, the drone will restart with default configuration (Station Mode, no password)
  - Connect to the drone's Wi-Fi
  - Open a terminal and type:

<code>
tello set-ap -i
</code>

This set the Tello drone in Access Point Mode, the argument ''-i'' start the setup in interactive mode, for more details of the ''CLI'' check the ''README.md'' file from the [[https://github.com/harleylara/tello-js | tello-js]] repo.


===== Setup Static IP Address for Tello Drones =====

When the Tello drone is configured in **Access Point Mode** (more details in the next section) the DHCP server automatically assigns an IP on the network, this makes the __ IP of the drone unpredictable__ when connecting to it. To solve this problem you can assign a **static IP to the drone** so that each time it connects to the network it receives the same IP, that way if you have multiple drones on the network each one can have a static IP that identifies it.

If you are using the router ASUS RT-AC51 **check the manual** in **section 4.2.2 DHCP Server** (item number 8). Note that configuring a static IP for a device on the network varies depending on the company or even the router model so check your router manual to perform this configuration.


===== Running the Demo =====

<code>
cd ~/tello-controller-jetson
python3 main.py
</code>

The source code is in github: [[https://github.com/eligosoftware/tello-controller-jetson| tello-controller-jetson ]]