nRF91 with CCS811 issue

RE: nRF91 with CCS811 issue

Simon — Tue, 13 Jul 2021 09:12:52 GMT

If there is a bug with the driver, you can create an issue here: https://github.com/zephyrproject-rtos/zephyr/issues/new/choose.

It would be nice if you could link to the issue in this ticket.

RE: nRF91 with CCS811 issue

mschweig — Mon, 12 Jul 2021 09:30:08 GMT

Hi Simon,

I found out, that are some issues of the wake and reset routine of the CCS811 zephyr driver.

A hotfix was that I added a reset pin to board config overlay but only attached the WAKE pin of the CCS811 to ground.

With that its working and I am receiving values. I will have a closer look at the issues in the driver in a few days.

Kind regards,

Manuel

RE: nRF91 with CCS811 issue

Simon — Sat, 10 Jul 2021 13:07:01 GMT

Do you have a logic analyzer? Try connecting it to the SDA and SCL lines to see what's going on, and if the correct address is used.

What happens if you try to read the status register from the Arduino? Try connecting the logic analyzer in that case and see what's going on.

Best regards,

Simon

RE: nRF91 with CCS811 issue

mschweig — Fri, 09 Jul 2021 12:47:11 GMT

Hi, I also saw that and double checked the address. I have the one with 5A.

Kind regards,

Manuel

RE: nRF91 with CCS811 issue

Simon — Fri, 09 Jul 2021 12:36:00 GMT

I googled the error message "Error 0x0BAE0001 occurred for message 0" and found this https://devzone.nordicsemi.com/f/nordic-q-a/75770/i2c_nrfx_twi-error-0x0bae0001-occurred-for-message-0.

Could you check that the address used is correct?

RE: nRF91 with CCS811 issue

mschweig — Fri, 09 Jul 2021 12:20:49 GMT

Hi Simon, I already checked zephyr.dts. i2c and ccs811 is properly included.

I debugged ccs811_init() and it fails at resetting the sensor.

<err> i2c_nrfx_twim: Error 0x0BAE0001 occurred for message 0
[00:00:00.228,179] <err> CCS811: Failed to read Status register

Kind regards,
Manuel

RE: nRF91 with CCS811 issue

Simon — Fri, 09 Jul 2021 12:15:38 GMT

Check the file ccs811/build/zephyr/zephyr.dts to see if everything from the overlay file is included. Search for "CCS811".
Debug the init function ccs811_init(), and see if it runs successfully. If that function fails, the call to device_get_binding() will fail as well

Best regards,

Simon