Barometer for altitude in Drone Programming - Step-by-Step Execution

Concept Flow - Barometer for altitude

Start

↓

Read Pressure

↓

Calculate Altitude

↓

Use Altitude for Control

↓

Repeat Reading

The drone reads air pressure from the barometer, calculates altitude from it, then uses that altitude to control flight, repeating this process continuously.

Execution Sample

Drone Programming

pressure = read_barometer()
altitude = 44330 * (1 - (pressure / 101325) ** 0.1903)
print(f"Altitude: {altitude:.2f} meters")

Reads pressure from barometer, calculates altitude in meters, and prints it.

Execution Table

Step	Action	Pressure (Pa)	Calculation	Altitude (m)	Output
1	Read pressure from barometer	90000	44330 * (1 - (90000 / 101325)^0.1903)	1113.57	None
2	Calculate altitude	90000	44330 * (1 - 0.8877^0.1903)	1113.57	None
3	Print altitude	90000	Same as step 2	1113.57	Altitude: 1113.57 meters
4	Repeat reading	Next pressure read	Repeat calculation	New altitude	Output updated
5	Stop	N/A	N/A	N/A	End of program

💡 Program stops when no more pressure readings are taken or drone is turned off.

Variable Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	Final
pressure	None	90000	90000	90000	90000
altitude	None	None	1113.57	1113.57	1113.57

Key Moments - 3 Insights

Why does altitude change when pressure changes?

Because altitude is calculated from pressure using a formula (see execution_table step 2). Lower pressure means higher altitude.

Why do we use the power 0.1903 in the calculation?

This exponent comes from the barometric formula to convert pressure ratio to altitude, as shown in execution_table step 2.

Why do we repeat reading pressure continuously?

Because the drone needs updated altitude to adjust flight in real time, as shown in execution_table step 4.

Visual Quiz - 3 Questions

Look at the execution_table, what is the altitude calculated at step 2?

A 101325 meters

B 90000 meters

C 1113.57 meters

D 0 meters

💡 Hint

Check the 'Altitude (m)' column at step 2 in the execution_table.

At which step does the program print the altitude?

A Step 3

B Step 2

C Step 1

D Step 4

💡 Hint

Look for the 'Output' column showing printed altitude in the execution_table.

If the pressure reading increases, how does the altitude change?

A Altitude increases

B Altitude decreases

C Altitude stays the same

D Altitude becomes zero

💡 Hint

Refer to the formula in execution_table step 2 and how pressure relates to altitude.

Concept Snapshot

Barometer measures air pressure.
Altitude is calculated using: altitude = 44330 * (1 - (pressure / 101325)^0.1903).
Lower pressure means higher altitude.
Drone reads pressure repeatedly to update altitude.
Altitude helps drone control flight height.

Full Transcript

This program uses a barometer sensor to read air pressure. It then calculates altitude from that pressure using a standard formula. The altitude is printed out. The program repeats this process to keep updating altitude as the drone flies. Lower pressure means the drone is higher up. The calculation uses a power of 0.1903 to convert pressure ratio to altitude. This helps the drone know how high it is and adjust its flight accordingly.