Companion computer integration (Raspberry Pi) in Drone Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the MAVLink library on the Raspberry Pi.

Drone Programming

import [1]

Drag options to blanks, or click blank then click option'

Atime

Bdronekit

Cpymavlink

Dserial

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'dronekit' instead of 'pymavlink' when direct MAVLink communication is needed.

The pymavlink library is used to communicate with the drone via MAVLink protocol on the Raspberry Pi.

2fill in blank

medium

Complete the code to open a serial connection to the drone on the Raspberry Pi.

Drone Programming

connection = serial.Serial('[1]', 57600)

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A/dev/ttyS0

B/dev/ttyAMA0

C/dev/ttyUSB0

D/dev/ttyACM0

Attempts:

3 left

💡 Hint

Common Mistakes

Using USB serial ports like /dev/ttyUSB0 which may not be connected to the flight controller.

The Raspberry Pi commonly uses /dev/ttyAMA0 for serial communication with the flight controller.

3fill in blank

hard

Fix the error in the code to send a heartbeat message to the drone.

Drone Programming

msg = mavutil.mavlink.MAVLink_heartbeat_message([1], 0, 0, 0, 0)

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A3

B1

C5

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 or 1 which represent other system types and cause communication issues.

The system type for a companion computer is usually set to 3 when sending heartbeat messages.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps sensor names to their readings only if the reading is above 10.

Drone Programming

sensor_data = {name: [1] for name, [2] in sensors.items() if value > 10}

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Avalue

Breading

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names for the reading in the comprehension causing errors.

The dictionary comprehension uses value as the variable for sensor readings in both places.

5fill in blank

hard

Fill all three blanks to filter telemetry data where altitude is above 100 and map the drone ID to altitude.

Drone Programming

filtered = [1] for drone_id, [2] in telemetry.items() if [3] > 100

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A{drone_id:

Baltitude

Caltitude}

D[drone_id:

Attempts:

3 left

💡 Hint

Common Mistakes

Using square brackets instead of curly braces for dictionary comprehension.

The code creates a dictionary comprehension mapping drone_id to altitude when altitude is above 100.