How do we acheive HCI commands with our own PC programmer?
On the PC side, you can use UART to communicate with RSL10 when the UART is connected; then you can send HCI commands to do your HCI test. Which commands to send depends on which test you want to perform. For details, refer the SIG document Bluetooth Core 5.0 vol6 part F “Direct test mode”.
On the RSL10 side, you need flash and our hci_app sample project. Make sure that the RSL10 UART setting matches with the UART settings on your PC side.