Hi Sir:     BMA253 chip id is 0xfa, maybe you used chip is BMA253.     If you can read out all register values and 0x00 register value can match BMA2XX chip id, please forward these values to us to re-check.    ... View more

Hi Sir:     Sorry to say that no ESP example is available. In general I also only use STM32 platform.     Regarding your issue, maybe you should check your communication correct or not if don't get CHIP ID. ... View more

Hi Sir:     Correct, you can use it. ... View more

Hi Sir:      Please see the following comments:      there are online converters which can do this, e.g. We also use this one as reference:     https://www.unternehmensberatung-babel.de/berechnungen/umrechnung-ppm.php    If you convert bvoc from PPM to mg/m3, you need to assume the current pressure, temperature and the molar mass of bVOC. The contained gases are mentioned in the BME680 datasheet in table 5 on page 10. By taking each single molecule weight and multiplying it with its content (e.g. 0.1 for 10%), you get the average molecular weight of bVOC.     Hopefully, it can help you. ... View more

Hi Sir:     I forwarded your request to our internal experts.     If possible, it is better to sign NDA with BST so that you can get more support and be shared more information.   ... View more