BME280-dat
BME280 Features
- Package 2.5 mm x 2.5 mm x 0.93 mm metal lid LGA
- Digital interface I2C (up to 3.4 MHz) and SPI (3 and 4 wire, up to 10 MHz)
- Supply voltage VDD main supply voltage range: 1.71 V to 3.6 V VDDIO interface voltage range: 1.2 V to 3.6 V
- Current consumption 1.8 uA @ 1 Hz humidity and temperature 2.8 uA @ 1 Hz pressure and temperature 3.6 uA @ 1 Hz humidity, pressure and temperature 0.1 uA in sleep mode
- Operating range -40…+85 C, 0…100 % rel. humidity, 300…1100 hPa- Humidity sensor and pressure sensor can be independently enabled/disabled
Bosch has stepped up their game with their new BMP280 sensor, an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183. This sensor is great for all sorts of weather sensing and can even be used in both I2C and SPI!
This precision sensor from Bosch is the best low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuraccy, 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
The BME280 is the next-generation of sensors from Bosch, and is the upgrade to the BMP085/BMP180/BMP183 - with a low altitude noise of 0.25m and the same fast conversion time. It has the same specifications, but can use either I2C or SPI. For simple easy wiring, go with I2C. If you want to connect a bunch of sensors without worrying about I2C address collisions, go with SPI.
Comparison: BMP280 vs BME280
1. Key Functional Differences
| Feature | BMP280 | BME280 |
|---|---|---|
| Primary Function | Measures pressure and temperature | Measures pressure, temperature, and humidity |
| Humidity Sensor | ❌ Not included | ✅ Included |
| Applications | Primarily for altitude and weather monitoring | Suitable for weather, indoor air quality, and IoT applications |
2. Hardware Differences
| Feature | BMP280 | BME280 |
|---|---|---|
| I2C Addresses | 0x76 or 0x77 | 0x76 or 0x77 |
| Pin Compatibility | Identical (drop-in replacement) | Identical (drop-in replacement) |
| Power Consumption | Slightly lower (~2.7 µA) | Slightly higher (~3.6 µA) |
3. Performance and Accuracy
| Feature | BMP280 | BME280 |
|---|---|---|
| Pressure Range | 300 - 1100 hPa | 300 - 1100 hPa |
| Pressure Accuracy | ±1 hPa | ±1 hPa |
| Temperature Range | -40°C to +85°C | -40°C to +85°C |
| Temperature Accuracy | ±1.0°C | ±1.0°C |
| Humidity Range | N/A | 0% - 100% RH |
| Humidity Accuracy | N/A | ±3% RH |
4. Cost
- BMP280: Slightly cheaper because it lacks a humidity sensor.
- BME280: More expensive due to the added humidity sensing capability.
5. Use Cases
BMP280
- Ideal for altitude measurement (e.g., drones, GPS systems).
- Suitable for simple weather stations (without humidity data).
BME280
- Designed for complete environmental monitoring, including temperature, pressure, and humidity.
- Perfect for IoT applications and indoor air quality monitoring.
Summary
- Choose BMP280 if you only need pressure and temperature readings and want a cost-effective solution.
- Choose BME280 if you need an all-in-one sensor for temperature, pressure, and humidity.