It seems that I have the same issue when I try the same as you, which is accessing the 8x Sensor board via the BSEC2 library. So far no communication (same error code, -2). Do you have any news from the bosch team? In case you're interested, I'd be very happy to exchange some experiences -> please write me here (mail hidden in link): http://tinymailto.com/nkdnnlr
I have filled the form more than a week ago and i ahve not heard back. it would have been so easy for everyone to have had access to the bme68x_demo_sample.ino source code and we could work out how they are connected etc.
I guess it was a bit early to accept that solution 😉 Yes I agree, it would be fantastic to have access to bme68x_demo_sample.ino, rahter than just to bme68x_demo_sample.ino.bin.
Could someone from Bosch help us out here?