Just like in the topic. Code below in `CMakeLists.txt` doesn't make BTstack to dump HCI comms: ``` target_compile_definitions(picow_bt_example_common INTERFACE PICO_STDIO_USB_CONNECT_WAIT_TIMEOUT_MS=3000 WANT_HCI_DUMP=1 # This enables btstack debug #ENABLE_SEGGER_RTT=1 ) ``` But, defining `#define WANT_HCI_DUMP 1` only in `btstack_config.txt` just works.