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BME280 multi-purpose sensor

bme280.jpg

This multi-purpose sensor is used to measure temperature, relative humidity and barometric pressure.

It operates as an I2C slave and is available from China on a miniature board with the I2C connections and power on a standard 0.1 inch header.

Raspberry Pi

The device uses I2C to communicate with a host master and with the Pi, the topmost pins on the GPIO header are utilised.

    +---P1---+
3V3 01       .
SDA 03       .
SCL 05       .
    .        .
GND 09       .
    .        .
    /        /
    .        .
    +--------+
    
Relevant I2C pins shown, others omitted.
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