HTCC-AB02S not working with basic program CCS811 - Please Help

Hi all,

I have been trying to use the " ](" as I decided to buy a CCS811.

Could anyone explain me what pins shall I use? I have seen that it’s using the GPIO0 and GPIO4.

The sensor has the following connections.

@jasonXu Could you help me please?


Take care.


It is GPIO0, and you can modify to your want.

you can also refer this code:

Hi @jasonXu,

Thanks for your help now I can see more clearly but I have another question about this program. What is the GPI04 doing? it just going from low, high and then low.

Thanks for your help.

Kind regards,


this code is writen for ab01. you can modify to you want.

Hi @jasonXu,

Thanks for your help once again.

Take care.

Kind regards,