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Doc update: Generic BMP280 usage instead of Adafruit BMP280. #2

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evgkarasev opened this issue Aug 15, 2017 · 0 comments

evgkarasev commented Aug 15, 2017 •

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There is a huge choice of cheap BMP280 Barometric Pressure Sensor Breakout Boards on Amazon, eBay or AliExpress like these ones:
https://www.amazon.com/Wrisky-GY-BMP280-3-3-Pressure-Precision-Atmospheric/dp/B01KZ6S06O
https://www.aliexpress.com/item/I2C-SPI-BMP280-3-3-Digital-Barometric-Pressure-Altitude-Sensor-High-Precision-Atmospheric-Module-Replace-BMP180/32681667220.html

You can use it instead of original Adafruit BMP280, the only thing you need is using the following pinout:

VCC -> +3.3V (J8 pin 1)
GND -> Ground (J8 pin 9)
SCL -> I2C1 SCL (J8 pin 5)
SDA -> I2C1 SDA (J8 pin 3)
CSB -> to +3.3V through a pull-up resistor (I2C bus selection if HIGH)
SDO -> to +3.3V through a pull-up resistor (0x77 I2C bus addr selection if HIGH)

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