![10pcs USB Conversion Card USB Male to Female Head microUSB to header 4P 2.54mm DIP USB3 GND/D+/D /5V) Adapter Plate|Demo Board Accessories| - AliExpress 10pcs USB Conversion Card USB Male to Female Head microUSB to header 4P 2.54mm DIP USB3 GND/D+/D /5V) Adapter Plate|Demo Board Accessories| - AliExpress](https://ae01.alicdn.com/kf/HTB1Dj.PXpY7gK0jSZKzq6yikpXa6/10pcs-USB-Conversion-Card-USB-Male-to-Female-Head-microUSB-to-header-4P-2-54mm-DIP.jpg_Q90.jpg_.webp)
10pcs USB Conversion Card USB Male to Female Head microUSB to header 4P 2.54mm DIP USB3 GND/D+/D /5V) Adapter Plate|Demo Board Accessories| - AliExpress
To what voltage should the D+ line be pulled up when designing USB connection in STM32? +5V or +3.3V? All documentation and dev board scematics says it's 3.3V, but it didn't work.
![Why I cannot receive data from USB to arduino when I connect direct from TX and RX arduino to TX and RX USB (D+ and D-) - Stack Overflow Why I cannot receive data from USB to arduino when I connect direct from TX and RX arduino to TX and RX USB (D+ and D-) - Stack Overflow](https://i.stack.imgur.com/ZwUis.jpg)