H801-And-D1Mini LED strip controller

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Hi to all,

I'm new to all this but i managed to make the controller and to hock it up on google and it all works fine except one thing.
The brightness of led strip on 100% settings in supla app or google assistant just gives like half the brightness.
I measured the voltage on led output on max settings in app and its not 12V. It's only 8V ….. what I did wrong ?
Please help

[elmaya]

i guess mosfet transistors are not sensitive enough to work with 3.3v.
What type are they and how are they connected?

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i guess mosfet transistors are not sensitive enough to work with 3.3v.
What type are they and how are they connected?

I used these schematics that I found on YouTube. All components are like in the picture
Main power supply is 12v and it goes to led strip + directly, and to buck converter to be lowered to 5v so the D1 Mini board can operate.

[elmaya]

don't connect directly to gpio.
Here is a connection example:https://en-forum.supla.org/viewtopic.php?p=53483#p53483

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Found the problem.
Instead of the IRF540, I placed TIP31 and resistors before the gpio and it works like a charm.
Full 12V of brightness on every color channel.
Thank you very much for the time and good,(educated) guess where the problem might be.