Command acknowledgment handling in Drone Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to send a command and wait for acknowledgment.

Drone Programming

send_command([1])
wait_for_ack()

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

ALAND

BTAKE_OFF

CMOVE_FORWARD

DHOVER

Attempts:

3 left

💡 Hint

Common Mistakes

Using a movement command instead of a takeoff command.

Not sending any command before waiting for acknowledgment.

The send_command function requires a command like TAKE_OFF to initiate the drone's takeoff and then waits for acknowledgment.

2fill in blank

medium

Complete the code to check if the acknowledgment status is successful.

Drone Programming

if ack_status == [1]:
    print('Command acknowledged')

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

ASUCCESS

BERROR

CTIMEOUT

DPENDING

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for ERROR instead of SUCCESS.

Using PENDING which means acknowledgment is not yet received.

The acknowledgment status SUCCESS means the command was accepted by the drone.

3fill in blank

hard

Fix the error in the acknowledgment timeout handling code.

Drone Programming

if ack_received is not [1]:
    retry_command()

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

ATrue

BNone

CFalse

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Checking if ack_received is not False which is the opposite logic.

Using None or 0 which are not boolean values here.

The code checks if acknowledgment was not received (ack_received is not True) to retry the command.

4fill in blank

hard

Fill both blanks to create a dictionary of commands with their acknowledgment status.

Drone Programming

ack_dict = {cmd: [1] for cmd in commands if ack_status[cmd] [2] 'SUCCESS'}

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

Aack_status[cmd]

B!=

C==

Dcmd

Attempts:

3 left

💡 Hint

Common Mistakes

Using the command name as the value instead of the acknowledgment status.

Using the wrong comparison operator like !=.

The dictionary comprehension maps each command to its acknowledgment status only if the status equals 'SUCCESS'.

5fill in blank

hard

Fill all three blanks to filter commands and create a dictionary with uppercase command names and their acknowledgment status.

Drone Programming

filtered_ack = [1]([2]: ack_status[[3]] for [3] in commands if ack_status[[3]] == 'SUCCESS')

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

Adict

Bcmd.upper()

Ccmd

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using list instead of dict which creates a list, not a dictionary.

Using the command name directly instead of uppercase for keys.

The code creates a dictionary with uppercase command names as keys and their acknowledgment status as values, filtering only successful acknowledgments.