@Robertof ab @felmue, thank you very much!
Now everything works!

I finally understood what was going on... I did some tests and then I managed to put an address in one module, then in the other and then I can access both at the same time. One of them was at 0x32 and the other at 0x33. I need 4 relays for my project... now the conditions acquired by a BME688 will change the states of the relays.

You helped a lot, not only to solve my problem but also to understand the process.

Success and health to you all!

@felmue, the screen shows numer 1, only...

Hi @felmue,

With one 2RELAY module, the result is: [52, 56, 64, 81, 102] and without is [52, 56, 64, 81]...

Sorry, I'm just starting with this...
Thank you very much...

Hi @Robertof,
I reproduced and understood your code, but as you can see in the images, nothing happens.
I'm also using UiFlow 1.13.6, it seems that there is some error in the module library...
I'm testing with only one 2RELAY module at a time, but both have the same problem.
I think the connection is fine... if I put the battery module underneath, the Core2 works without the USC-C connection, that is, with the attached battery (M5GO2 module).
Could there be an update in the Core2 firmware?

Thank you very much for your help!

Hi @Robertof,

Did you use UIFlow1?
I didn't find the 2RELAY module in UIFlow2.
I'll try to reproduce your tip and see if it works.

Thanks!

Hi Felix,

I removed the original battery and the gray part, bought the M5GO2 to replace it, but now I'm not even using it.
I'm trying with just one module, but when I use the examples (I tried with my code and it didn't work either), I get the message that the module is not attached... I tried with each of them individually.

Thank you.

I'm trying to use 2x 2RELAY modules on a Core2, is this possible?
I've tried everything, but I can't access the modules. I've tried with just one of them, via Arduino and via UIFLow, which says that the module is probably not attached.

I saw that it's possible to change the I2C address of the modules, but how do I do this, one at a time?

Thanks for any help...