Description

BME280 Sensor

Precision Environmental Sensing for Your Projects! 🌡️💧🌤️

The BME280 is a high-accuracy, low-power sensor that measures temperature, humidity, and barometric pressure—all in one compact module. Designed by Bosch, it’s perfect for weather stations, IoT devices, indoor climate monitoring, and even altitude tracking. Easily integrate it with Arduino, Raspberry Pi, or ESP32 using I2C or SPI.

🔍 Key Features

✅ Triple Sensing

• Temperature: ±1°C accuracy

• Humidity: ±3% RH accuracy

• Pressure: ±1 hPa absolute accuracy

✅ Low Power Consumption – Ideal for battery-powered and sleep-mode devices.
✅ Communication Protocols – I2C (0x76 or 0x77) & SPI supported.
✅ Factory Calibrated – Plug-and-play with no extra setup.
✅ Altitude Estimation – Estimate elevation from pressure data.

⚙️ Technical Specs

• Operating Voltage: 1.7V – 3.6V

• Logic Level Compatibility: Use level shifter for 5V systems

• Current Draw:

  • Normal Mode: 3.6 µA (1Hz)

  • Sleep Mode: 0.1 µA

• Interfaces: I2C (up to 3.4 MHz) / SPI (up to 10 MHz)

• Pressure Range: 300 – 1100 hPa (approx. +9000m to -500m altitude)

• Humidity Range: 0 – 100% RH

• Temperature Range: -40°C to +85°C

🔌 Wiring Guide (I2C with Arduino)

Tip: If I2C address 0x76 doesn’t work, try 0x77.

🌍 Common Applications

• 🌦️ Weather Stations – Measure climate conditions in real time

• 🏠 Smart Homes – Optimize heating and cooling based on actual indoor data

• ✈️ Drones/Hiking – Estimate elevation based on pressure

• 🌱 Greenhouses & Labs – Maintain environmental balance

• 🔋 Remote IoT Sensors – Ideal for solar-powered, low-power deployments

✅ Why Choose the BME280?

• All-in-One Sensor – Consolidate 3 sensors into one

• High Accuracy – Calibrated and reliable readings

• Wide Compatibility – Works with major platforms

• Low Power Footprint – Great for remote projects

🛠️ Troubleshooting Tips

• I2C Address Issue? Try 0x77 if 0x76 doesn’t work

• SPI Mode? Use Adafruit_BME280 bme(BME_CS); and define CS, MOSI, MISO, SCK

• Voltage Mismatch? Use logic-level shifter for 5V boards