Barometric pressure and temperature sensor by Bosch. I2C and SPI, ±1 hPa.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | SDO/SA0 | I2C address select, SPI MISO | BUS |
| 2 | CSB | Chip select SPI, tie high for I2C | I/O |
| 3 | SDA/SDI | I2C data, SPI MOSI | BUS |
| 4 | SCK/SCL | SPI clock, I2C clock | BUS |
| 5 | GND | Ground | GND |
| 6 | VCC | 1.8V–3.6V supply | PWR |
The BMP280 is a precision digital barometric pressure and temperature sensor by Bosch. It supports both I2C and SPI interfaces. Used in weather stations, altitude measurement, and indoor navigation.