SPECIFICATIONS

1. Product Overview

Model core function & generation difference

1. BMP180 (Old generation basic version)

• Measurement: Barometric pressure + Temperature only

• Feature: Low cost, entry-level altimeter module, phased out new design, only for old equipment maintenance replacement

• Range: Pressure 300~1100hPa, Temp 0~65℃

1. BMP280 (Upgraded high-precision pressure chip)

• Measurement: Barometric pressure + Temperature only

• Upgrade over BMP180: Lower power consumption, higher pressure accuracy, wider temp range, faster response, industry mainstream single pressure sensor

• Range: 300~1100hPa, Temp -40~+85℃, average current only 2.7µA @1Hz sampling

1. BME280 (3-in-1 mainstream environmental sensor)

• Measurement: Temperature + Humidity + Barometric Pressure all-in-one

• Core advantage: Balanced precision & power, drop-in compatible with BMP280 footprint, most popular for weather station & smart home

• Humidity accuracy ±3%RH, Temp ±0.5℃, Pressure ±0.12hPa relative error

1. BME680 (4-in-1 air quality flagship sensor)

• Measurement: Temperature + Humidity + Pressure + VOC volatile organic gas (IAQ indoor air quality index calculation)

• Exclusive feature: Built-in gas heating plate, detect formaldehyde, alcohol, odor, volatile pollutants, perfect for ventilation & air purifier control

• Support IAQ value output to judge indoor air pollution degree

Unified shared module specs

• Communication: Standard I2C + SPI dual digital interface, compatible with Arduino, ESP32, STM32, Raspberry Pi

• Supply voltage: 3.3V DC (do not connect 5V directly to avoid chip burnout)

• Breakout board pin definition: VCC, GND, SDA, SCL, SDO (SPI optional pin)

• Package: Compact small PCB with 4P pin header, reserved mounting hole for fixed installation

• Operating temperature: -40℃ ~ +85℃, adapt indoor, outdoor, drone airborne environment