About ECall

Hi, I will use the BME688 sensor in combination to the BSEC2 library in a Cortex M4 STM32F401 MCU implementation. I want to retrieve the IAQ and sIAQ information from the system. As it is a battery powered device, I will use the Ultra Low Power mode for the BSEC2 + sensor implementation and the standby mode of the MCU where only 4kB of backup SRAM is maintened when the MCU sleeps. I understand that to get relevant results, the system must retain the sensor config and some data to get the baseline for the IAQ accurate in time. What data should I save in the backup SRAM when my MCU is in standby mode and can it be stored in less than 4kB ? Is it even possible to do that with the BSEC library ? Thanks   ... View more

Hi, I am currently using the BME688 x8 evaluation board alongside the Feather adafruit ESP32 board. I use the BSEC2 library. After setting up the multiple necessary librairies, the "basic.ino" arduino example with x8 board works well with one sensor : I get the expected readouts every 3 seconds, matching the sample rate configured. But if i try to get readouts from another sensor on the board, the configuration works fine, but one sensor is giving me a :  BSEC warning code : 100 I know that reading data from multiple sensors is possible with this board, as the arduino example used alongside BME AI studio works fine. But the level of abstraction used in this example is too much for my need. Is it possible to have a heads up on how to read data from multiple sensors in this simple example ? Best regards, ECall ... View more