Product Description
| The BME280 is a small, low-power digital composite sensor based on the Advanced Porous Silicon Membrane (APSM) process, capable of measuring ambient temperature, humidity, and atmospheric pressure. It is backward compatible with the BMP280, sharing the same register control and data read-out operations for pressure and temperature. The humidity-sensitive element features fast wake-up and response times, high accuracy, and a wide operating temperature range. The pressure-sensitive element is a piezoresistive, low-noise, high-precision, and high-resolution absolute atmospheric pressure sensor. The temperature-sensing element boasts low-noise and high-resolution characteristics, with temperature values enabling automatic self-compensation for humidity and pressure. Both the humidity-sensing and pressure-sensitive elements can be independently enabled/disabled by configuring the sampling rate register, allowing adjustment of the sampling rate for the sensitive elements. This makes the BME280 ideal for space-constrained mobile devices such as smartphones, tablets, smartwatches, wearables, weather forecasting, vertical speed indication, flight control systems, indoor/outdoor navigation, and smart home devices. |
| Product Parameters Operating Voltage: BME280 (1.7~3.6VDC), BMP280 (5VDC) Temperature Measurement Range: 0°C~65°C Temperature measurement error: ±0.5°C max ±1°C; resolution 0.1°C Relative humidity measurement range: 0%~100% Humidity response time: >1s Relative humidity measurement error: ±2%; humidity hysteresis: ±1%; resolution 0.8% Air pressure measurement range: 300~1100 hPa (hectopascals) Air pressure measurement error: ±1 hPa; resolution 0.18 Pa Digital interface type: IIC (slave mode 3.4MHz) or SPI 3-wire or 4-wire slave mode 10MHz Dimensions: 15.4mm (length) × 11.6mm (width) × 2.4mm (height) Equipped with M3 mounting screw holes for easy installation and fixation. |
| Pin Description: VCC: Positive Power Supply GND: Ground SCL: I2C/SPI serial clock line SDA: I2C Serial Data Line 3-line SPI serial data input/output port 4-wire SPI Serial Data Input Port CSB: Chip Select Pin, connected to high level (default) for I2C communication interface and low level for SPI communication interface. SDO: I2C Address Select Bit 4-wire SPI Serial Output Port |
| Instructions for use: The module determines the device address through the SDO pin in 12C mode. The SDO 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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