BMP280 / BME280 Pressure (Temp / Humidity)
by Bosch
SKU: PSA-CMP-BMP280
No reviews yetTypical India street price
₹70–₹220
Barometer for altitude and weather. BME280 adds humidity.
Interface: I2C or SPI
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Concept
MEMS pressure sensor → hPa. Altitude from barometric formula.
A little theory
Piezoresistive membrane. 1 hPa ≈ 8.3 m near sea level (rough). In the classroom, treat BMP280 / BME280 Pressure (Temp / Humidity) as a intermediate part using I2C or SPI. Typical India street price is about ₹70–₹220. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
I2C 0x76/0x77. Adafruit/Bosch libraries give °C, hPa, (RH).
Classroom & project use
- Altimeter
- Weather station
- Floor detect
Buying in India
Precautions
- Share a common GND with the microcontroller
- Verify polarity and voltage before powering the circuit
Specifications
| Pressure | 300–1100 hPa |
| Bus | I2C/SPI |
| Category | Sensors |
| Difficulty | Intermediate |
| Voltage | 3.3V (modules often 5V-safe) |
| Interface | I2C or SPI |
Pinout
VCC | GND | SCL | SDA (confirm address with I2C scanner)
