Product Introduction

BME280 is a small package low-power digital composite sensor that can measure environmental temperature, humidity, and atmospheric pressure. It is backward compatible with BMP280, and the control and data reading operation of the pressure temperature register are the same. Moisture sensitive components have fast wake-up and response time, high accuracy, and a wide temperature working range; The pressure sensitive element is a piezoresistive, low-noise, high-precision, high-resolution absolute atmospheric pressure sensing element; Temperature sensing components have low noise and high resolution characteristics, and temperature values can be temperature compensated and self corrected for humidity and air pressure. The humidity sensing element and the air pressure sensing element can be independently enabled/disabled. The sampling rate of sensitive components can be set by configuring the sampling rate register. Very suitable for mobile devices with limited space, such as smartphones, tablets, smartwatches and wearable devices, weather forecasts, vertical speed indicators, flight control equipment, indoor and outdoor navigation, smart home devices.

Product parameters

Working voltage: 1.7~3.6V DC

Temperature measurement range: 0 ° C~65 ° C

Temperature measurement error: soil 0.5 ℃ MAX ± 1 ℃; Resolution 0.1 ℃

Relative humidity measurement range: 0%~100%

Humidity response time: greater than 1 second

Relative humidity measurement error: ± 2%; Humidity hysteresis: soil 1%; Resolution 0.8%

Pressure measurement range: 300~1100hPa (hectopascals)

Air pressure measurement error: soil 1 hPa resolution 0.18Pa

Digital interface type: IC (slave mode 3.4MHz) or SPI (3-wire or 4-wire slave mode 10MHz)

Size: 15.4mm (length) * 11.6mm (width) * 2.4mm (height)

Equipped with M3 fixed screw holes for easy installation and fixation

Product pins

VCC: Power supply positive

GND: land

SCL: 12C/SPI serial clock line

SDA: 12C serial data cable

3-wire SPI serial data input/output terminal 0

4-wire SPI serial data input port

CSB: Chip selection pin, connected to high level (default) for IC communication interface, low level for SPI communication

Message interface

SD0:12C Address Selection Bit

4-wire SPI serial output terminal 0

Instructions

The module determines the device address through the SD0 pin in 12C mode. The SD0 is connected to GND and the low-level slave address is 1110110 (0x76). This module defaults to 0x76; Connect to high-level slave address 1110111(0x77)

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