GY-BMP280Module

12 September 2018 - 0 Comments

GY-BMP280Module

GY-BMP280Module Pinout

Pin configuration

Pin No.	Pin Name	Pin Description
1	VCC	Power source of 3.3VDC
2	GND	地面
3	SCL.	Serial Clock
4	SDA	Serial Data
5	CSB.	CSB.pin to GND to have SPI and to VCC(3.3V) for I2C. It’s an input to the chip.
6	SDO	SerialDataOut /MasterInSlaveOut pin, for data sent from the BMP280 to your processor

Features

TheGY-BMP280modulecomes withBMP280 sensor, which is an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183.
该传感器对于各种天气传感非常重要，甚至可以在I2C和SPI中使用。
This precision sensor is the best low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter accuracy
引脚音高：2.54mm
模块尺寸：11.5mm * 15mm

Electrical specifications of GY-BMP280 Module

Model: GY-BMP280-3.3
Chip: BMP280
Power supply: 3V/3.3V DC
Peak current: 1.12mA
Air pressure range : 300-1100hPa (equi. to +9000…-500m above sea level)
温度范围：-40 ... +85°C
Digital interfaces: I²C (up to 3.4 MHz) and SPI (3 and 4 wire, up to 10 MHz)
Current consumption of sensor BMP280: 2.7µA @ 1 Hz sampling rate

简短的关于GY-BMP280国防部ule

The GY-BMP280 Barometer Sensor is a breakout board for Bosch BMP280 high-precision and low-power digital barometer. It can be used to measure temperature and atmospheric pressure accurately. It can be connected to a microcontroller with I2C.

如何使用GY-BMP280模块？

TheGY-BMP280module operates from 3.3V so requires 3.3V power and must be driven with 3.3V logic levels. If needed to operate at 5V, it can be done using voltage regulator and level shifters as it doesn’t contain one. It is typically recommended to operate it on 3.3V and maximum at 3.6VDC. The module GY-BMP280 module simply supports both I²C and SPI interfaces and comes with default I²C address of 0x76. The Chip Select (CSB) and Serial Data Output (SDO) pins of the BMP 280 are necessary only when SPI-based (four-wire) communication is applied. I2C is a two wire interface SDA SCK.

Leave pin 6 of the module (SDO) unconnected to set the I²C address to 0x76 – the on-board resistor pulls the SDO pin low setting the address to 0x76.

To change the I²C address to 0x77, connect pin 6 of the module (SDO) to Vcc which would typically be the 3.3V supply.

模块（CSB）的引脚5必须连接到VCC以选择I²C接口。这已经通过车载上拉电阻完成，因此使用I²C接口时，可以断开引脚5。