Thank you!I already solve my problem last night, the module had a problem with the SHUTDOWN - Mode

The HAL_GPIO_WritePin wants to see just 1 or 0, so this line i "garbage". But how I can write the data to lets say D1 otherwise?

So you mean I should set the value first and then send it via HAL_GPIO_WritePin?I also changed now the pins on Pull Up and CS on Open Drain

I know this fact. Yesterday I was going the configuration with my teacher through and he said, that it is fine and that the 5V thing is not "necessary", because it worked also from other students. The proble ist just in the code and I think its the w...