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Digital barometric pressure sensor

BMP280 Working Principle

Learn how BMP280 works with an illustrated explanation and practical readings.

BMP280 at a glance

Follow the labeled connections and functional stages

BMP280 working principle: illustrated functional stages, basic circuit and connections
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How it works

3 stages · Explore one step at a time

Step 1 / 3

Power and identify

Supply both domains, wait for startup and NVM copying, then confirm chip ID 0x58 at register 0xD0.

Step 2 / 3

Configure and acquire

write ctrl_meas 0xF4 = 0x25 for ×1 temperature, ×1 pressure and forced mode. Wait for this conversion to complete.

Step 3 / 3

Compensate and display

Burst-read six bytes from 0xF7. Decode raw fields, use this sensor’s calibration and convert pressure from Pa to hPa by dividing by 100.

Component view