BME688 - Arduino MKR WiFi 1010 Communication failure I2C

[Christoforos]

Hello,

I am trying to get raw data from the BME688 sensor on a Sparkfun board on the Arduino MRK WiFi 1010 board using Arduino IDE 2.0.3 and I2C protocol. I have installed both BME68x and BSEC2 from GitHub. I am not sure if I actually need BSEC2 if I only neet raw data and not iaq. 

I can compile and upload the parallel_mode, sequential_mode and forced_mode examples and I get the same error in the Serial monitor: 

Sensor error:Communication failure

 I guess that the error comes from the code below:

#ifndef PIN_CS

#define PIN_CS SS

#endif

/* initializes the sensor based on SPI library */

bme.begin(PIN_CS, Wire);

I modified the line:  " bme.begin(PIN_CS, SPI); " to " bme.begin(PIN_CS, Wire); " such that I2C protocol is used instead of SPI. 

Any help please?

Many thanks!

[Minhwan]

Hi, 

I believe you are using Arduino since your boards for Arduino. 

If so, you have to download BME68x API and BSEC2 for Arudino in below URL. 

https://www.bosch-sensortec.com/software-tools/software/bme688-software/

You should add those 2 zip files in your Arduino library. 

Then, open BSEC2 example like basic.ino 

\Arduino\libraries\Bosch-BSEC2-Library-master\examples\generic_examples\basic\basic.ino

You shouldn't touch BME68x API part. 

The default interface for BSEC2 is i2c, so you can directly use it. 

Thank you. 

[Christoforos]

Dear  Minhwan,

Thank you for your reply!

Yes, I use Arduino IDE 2.0.3. 

I followed the steps you described exactly. When I compile for MKR Wifi 1010 I get the following warning:

"

In file included from /Users/christoforospanteli/Documents/Arduino/libraries/Bosch-BSEC2-Library-master/src/bsec2.cpp:39:0:
/Users/christoforospanteli/Documents/Arduino/libraries/Bosch-BSEC2-Library-master/src/bsec2.h: In member function 'const bsecData Bsec2::getData(bsecSensor)':
/Users/christoforospanteli/Documents/Arduino/libraries/Bosch-BSEC2-Library-master/src/bsec2.h:154:13: warning: missing initializer for member 'bsec_output_t::signal' [-Wmissing-field-initializers]
{ 0 };
^
/Users/christoforospanteli/Documents/Arduino/libraries/Bosch-BSEC2-Library-master/src/bsec2.h:154:13: warning: missing initializer for member 'bsec_output_t::signal_dimensions' [-Wmissing-field-initializers]
/Users/christoforospanteli/Documents/Arduino/libraries/Bosch-BSEC2-Library-master/src/bsec2.h:154:13: warning: missing initializer for member 'bsec_output_t::sensor_id' [-Wmissing-field-initializers]
/Users/christoforospanteli/Documents/Arduino/libraries/Bosch-BSEC2-Library-master/src/bsec2.h:154:13: warning: missing initializer for member 'bsec_output_t::accuracy' [-Wmissing-field-initializers]

"

When I compile for esp32 I get the following error: 

"

/Users/christoforospanteli/Documents/Arduino/libraries/Bosch-BSEC2-Library-master/src/bsec2.cpp:138: undefined reference to `bsec_sensor_control'
collect2: error: ld returned 1 exit status

"

This means BSEC2 library works for MKR WiFi 1010 and I do get readings, but not for esp32. The parallel_mode example in the BME68x library compiles and uploads on both boards but I get "

> Sensor error:Communication failure

in the serial monitor. I want to save the raw data on an SD card, so my question is: Do I actually need BSEC or just BME68x library? 

Many thanks!

[Christoforos]

I attach a document showing the circuit I am using. 

[Minhwan]

Did you check that you need pull up resistor for I2C or not? 

If you need, please put it.