interfacing bosch bme 280 shuttle board with msp432p401r

Hi Mohammed!

Please add a link to the "BME 280 shuttle board". Thanks!

Dennis

Edit: This one?

the link for the BME 280 is
www.bosch-sensortec.com/.../bme280_1

and the link for the suttleboard is
ae-bst.resource.bosch.com/.../BME280_Shuttleboard_Flyer.pdf

Hi Mohammed!

In the flyer for the shuttle board you find this picture which shows you the connections of the BMP280 and the pinout of the shuttle board it sits on:

The sensor can work with SPI or I²C. I would recommend to start with SPI, but this is my personal point of view. In the datasheet of the BMP280 you find this explanantion on how to select the desired communication mode:

So for SPI you need to connect seven pins to the MSP-EXP432P401R LaunchPad - here is an example when using UCB0 of the MSP432P401R:

Dennis

hello Dennis

thank you for the response...the image you provieded is of BMP 280, but I have BME 280..but i think its almost similar ...
the other problem I have is that I am instructed to interface via I2C..so is it ok if I connecte pin 6.4 and 6.5 of launchapd to pin 17 and 18 of the shuttle board along with vdd,vddio and ground ??...and will there be 5 pins connected to the mcu in case of interfacing via i2c??

Mohammed Towhidun Nabi said:

the image you provieded is of BMP 280, but I have BME 280

Yeah, right. But the pinout is the same.

Mohammed Towhidun Nabi said:

I am instructed to interface via I2C

I²C on the BME280 has SDA on pin 3 and SCL on pin 4 which is pin 17 and 18 on the shuttle board, right. And those can be connected to 6.4 and 6.5 on the MSP-EXP432P401R. Five wires is correct, too. Don't forget the pull-up resistors for SCL and SDA.

Dennis

Hello again Dennis
I could not understand about u saying pulling up resistors for SCL and SDA..can you tell me how do I do that ??

I²C needs resistors from the SCL and the SDA line to VCC (VDDIO in your case):

Is it necessary to connect pin 15 of the shuttle board which is SDO??

Yes, this sets the address of your device. Connect it to GND or VDDIO.

This is explained on page 31 of the datasheet:

so this means total 6 pins , 1 less pin compared to SPI
Shuttle board pins Msp432
1----------------------------------3.3V
2----------------------------------3.3V
3----------------------------------gnd
15--------------------------------gnd
17-------------------------------6.4
18-------------------------------6.5
correct?

Thanks for your great help Dennis!
Mohammed Towhidun Nabi, has some issues to connect the module with MSP432, I have not podide be helpful!

thanks a lot Dennis ....I have been able to run the code .. :)