Model: BMP280
BMP280 sensor, with low altitude noise down to 0.25 meters and equally fast conversion time.
Can use I2C or SPI. For easy wiring, choose I2C. If you want to connect a large number of sensors without worrying about I2C address conflicts, please choose SPI
Parameters:
Operating voltage: 1.7~3. 6VDC
Temperature measurement range: 0° C~65℃
Temperature measurement error: 0.5℃ MAX 1℃; resolution 0.1℃
Pressure measurement range: 300~1100hPa (hPa)
Pressure measurement error: 1hPa resolution 0.18Pa Digital interface type: 1IC (slave mode 3.4MHz) or SPI (3-wire or 4-wire slave mode 10MHz)
Product pins:
VCC: power supply positive
GND: ground SCL: I2C/SPI serial Clock line
SDA:
12C serial data line
3-wire SPI serial data input/output port 0
4-wire SPI serial data input port
CSB: chip select pin, high level (default) for 1IC communication interface, low level for SPI communication interface
SDO: 12C address selection bit 4-wire SPI serial output port 0
Instructions:
The module determines the device address through the SD0 pin in 12C mode. The low level of SDO connected to GND is 1110110 (0x76). The default of this module is 0x76; the high level slave address is 1110111 (0x77)