mhd eid

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7 years, 1 month ago.

BMP280 Library for SPI

Hi there,

I have a problem connecting Adafruit BMP280 pressure sensor to Nucleo F401RE via SPI. I did that successfully using Arduino ADK because I found a library for that.

Is there any similar library on mbed or an example code for that?

Thanks

2 Answers

Mark Peter Vargha
7 years, 1 month ago.

I found one, but never tried. Have you tried the search function?

https://developer.mbed.org/search/?q=BMP280

Thank you very much, I tried this one before and found I2C library not SPI.. The one I need id SPI

posted by mhd eid 10 Mar 2017

Oh, sorry. I missed that part of your question.

posted by Mark Peter Vargha 10 Mar 2017
Toyomasa Watarai
7 years, 1 month ago.

Hi,

I created an SPI version library and example code here.

https://developer.mbed.org/users/MACRUM/code/BME280_SPI_Hello/

Thank you so much, I highly appreciate your reply.. I used it with BMP280 and BME280 but I got the same result which is constant values:

51.20 degC, 500.04 hPa, 0.00 %

51.20 degC, 500.04 hPa, 0.00 %

51.20 degC, 500.04 hPa, 0.00 %

51.20 degC, 500.04 hPa, 0.00 %

51.20 degC, 500.04 hPa, 0.00 %

51.20 degC, 500.04 hPa, 0.00 %

51.20 degC, 500.04 hPa, 0.00 %

51.20 degC, 500.04 hPa, 0.00 %

51.20 degC, 500.04 hPa, 0.00 %

51.20 degC, 500.04 hPa, 0.00 %

51.20 degC, 500.04 hPa, 0.00 %

I tried to apply variable pressure and temperature but the values still constant.. And for sure the sensors are working properly because I tested them on Arduino..

Did you try this library before?

Regards

posted by mhd eid 13 Mar 2017

Quote:

Did you try this library before?

Yes, I used this library with Switch Science BME280 breakout. https://international.switch-science.com/catalog/2236/

mbed LPC1768 pinSSCI BME280 breakout pin
1 (GND)5 (GND)
40 (VOUT)6, 7 (Vcore, Vio)
p5 (mosi)3 (SDI)
p6 (miso)1 (SDO)
p7 (sclk)2 (SCK)
p84 (CSB)
posted by Toyomasa Watarai 14 Mar 2017

Hi, I just quick checked it with Nucleo F401RE and it worked fine.

NUCLEO F401RE pinSSCI BME280 breakout pin
GND5 (GND)
3V36, 7 (Vcore, Vio)
D4 (mosi)3 (SDI)
D5 (miso)1 (SDO)
D3 (sclk)2 (SCK)
D74 (CSB)

BME280_SPI sensor(D4, D5, D3, D7); // mosi, miso, sclk, cs

24.71 degC, 1001.36 hPa, 41.59 %
24.70 degC, 1001.36 hPa, 41.57 %
24.68 degC, 1001.37 hPa, 41.56 %
24.65 degC, 1001.37 hPa, 41.53 %
24.64 degC, 1001.34 hPa, 41.54 %
24.63 degC, 1001.29 hPa, 41.56 %
24.62 degC, 1001.26 hPa, 41.59 %
24.60 degC, 1001.33 hPa, 41.60 %
24.60 degC, 1001.30 hPa, 41.60 %
24.57 degC, 1001.35 hPa, 41.61 %
24.56 degC, 1001.36 hPa, 41.63 %
posted by Toyomasa Watarai 14 Mar 2017

I now noticed that you are using BMP280, not BME280. My BME280 library may not work with BMP280.

posted by Toyomasa Watarai 14 Mar 2017