A few questions for BME688 evaluation kit

[productive_monk]

• Is the evaluation kit capable of giving the absolute concentration values (e.g. ppm) of gas? In the AI Studio, after importing data, I only see a raw scale with no units on the graph. Are these resistance values in ohms? Same goes for humidity, temperature. No units. 
• Do I need to set up the mobile app? How is this different from AI Studio? 
• What are the BSEC2 and BME68x libraries for Arduino used for? Do I need these if I already flashed using Flash.bat? 

[productive_monk]

Trying to run a demo (Bosch_BSEC2_Library/examples/bme68x_demo_sample) but getting this error:

Library BSEC2 Software Library has been declared precompiled:
Using precompiled library in /Users//Documents/Arduino/libraries/BSEC2_Software_Library/src/esp32
/Users//Documents/Arduino/hardware/espressif/esp32/tools/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: /private/var/folders/kv/kphtm_b97z54r3ykkvzsxfs80000gn/T/arduino/sketches/9C4CFACC1EEF63925597D15802135359/bme68x_demo_sample.ino.elf section `.dram0.bss' will not fit in region `dram0_0_seg'
/Users//Documents/Arduino/hardware/espressif/esp32/tools/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: DRAM segment data does not fit.
/Users//Documents/Arduino/hardware/espressif/esp32/tools/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: DRAM segment data does not fit.
/Users//Documents/Arduino/hardware/espressif/esp32/tools/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: region `dram0_0_seg' overflowed by 8992 bytes
collect2: error: ld returned 1 exit status

exit status 1

Compilation error: exit status 1

[BSTRobin]

Hi productive_monk,

You could download latest BSEC2.4.0.0 package from https://www.bosch-sensortec.com/software-tools/software/bme688-software, in integration you could find the output signal of BSEC algorithm.

The dev kit’s software includes the use of the BSEC algorithm. Units of gas resistance, temperature, and humidity, referring to the type and unit of output of the BSEC algorithm. The reference code is used in the Arduino environment, and the description of the BME68X library is referenced: The BSEC fusion library has been conceptualized to provide a higher-level signal processing and fusion for the BME680. The library receives compensated sensor values from the sensor API. It processes the BME680 signals to provide the requested sensor outputs.

[productive_monk]

Trying to upload bme_68x_demo_sample.ino via Arduino IDE. Do you know why I might get this error: ".dram0.bss' will not fit in region `dram0_0_seg" 

(see full error in my reply above) 

[BSTRobin]

Hi productive_monk,

You can flash the binary file to BME688 dev kit if you would like to use the demo software.