About EmiQS

Well.... Has this problem: https://community.bosch-sensortec.com/t5/MEMS-sensors-forum/BSEC-2-0-BME688-to-detect-BSEC-OUTPUT-GAS-ESTIMATE-1/td-p/45471 Had a problem that when using HIGH PERFORMANCE to get gas estimates and IAQ..some times the library just hanged for MINUTES (kept giving temperature, humidity and pressure values). Couldn't achive a constant time between gas values aquisition. Other problem I had was that I wanted a librery were I could user BME688 and BME680 (just IAQ values) sensor without having to change the code (not all the code at least). Wanted this because BME680 stock is so not stable. Couldn't get BME680 working correctly with BME2.0 (even if that library is supposed to be for BME68x). I guess the library is very new and still needs a bit of work... If it was open source it would be much easier to work with and fix... I guess al the problems I mentioned above have a solution. At the moment I had them, couldn't solve it fast enought so went back to BME1.x as the moderators recommended for BME680. So now my project depends on the availability of BME680 sensor which is very unstable.  Another factor to "go back" to BME680 (only BSEC 1.x) was that it resulted impossible to get BME688 development board in latin america. It was just available in a few stores in germany when I checked. My project just needed IAQ values at the beggining, but wanted to sell an "extra feature" in future updates (OTA). Hope this helps you! I do not mean to criticize BSEC 2.x or anything. Just wanted to share my experience. Both BSEC 1 and BSEC 2 are amazing libraries, but maybe BSEC 2 still need a little more work to acchive all it says it can do (in a "plug and play" manner at least). Regards. ... View more

I had the same problem. Check the raw resistance value, in my case that value was abnormally high when using BME688 with BSEC 1.x (Mega ohms order). Couldn't finde the cause, so just kept using BME680. In BSEC 2.0 didn't had that problem with BME688 but many others... (so kept using BME680 with BSEC 1). ... View more

Hello. I've experienced the same behavior with BSEC2 and BME688. Sometimes sensor pauses output (callback not called) for even more than 1 minute. I've experienced this only with example code (high performance mode). Haven't had this problem with LP mode.   BSTRobin, I've tried using BME688 with BSEC1 but I couldn't get good results. I received not real IAQ measurements due to not real RAWGAS values (extremely high values). I tried with LP configuration. The other sensors (temp, humidity and pressure) worked well. Do you have any recommendation for using BME688 on BSEC 1? Thanks! ... View more

Hello acanthe, I'm experiencing similar issues. In my case the regular cycle takes 10.6seconds, but some times BSEC takes as long as 120seconds to give me a IAQ value. I see in your logs IAQ is always 25. Are you having problems with IAQ not moving from 25 (acc = 0) too? I'll follow your topic! Regards. ... View more

Helllo. I'm having this exact problem with BME688 & BSEC2.0 . Migrated my code from BSEC 1.4 to BSEC 2.0 (ESP32 board) and now IAQ Accuracy is always 0. I'm using  "BSEC_SAMPLE_RATE_HIGH_PERFORMANCE". And in "setConfig" I'm using BSEC provided configuration file "bsec_serialized_configurations_iaq.h" I was wondering... In BSEC 1.4 I used a configurating file (generic_33v_3s_4d) which configured, among other things (I guess), the sample rate (lp), the sensor voltage (3.3v) and sensor history (4days). Those configurations are not needed in BSEC 2.0 or it's supposed they're included in bsec_serialized_configurations.h? I'm also having problems when try to use BSEC 2.0 in any other mode than HIGH_PERFORMANCE. For example, if I change the sample rate to BSEC_SAMPLE_RATE_LP as I was using with BSEC 1.4, I got the following error: BSEC error code : -12. Which according to bsec_datatypes.h means: "The sample_rate of the requested output (virtual) sensor passed to bsec_update_subscription() does not match with the sampling rate allowed for that sensor"   Thanks! ... View more