00> [00:00:00.005,676] <inf> cdc_acm_echo: Wait for DTR
00> [00:00:09.854,003] <dbg> usb_dfu.dfu_status_cb: USB device connected
00> [00:00:09.854,003] <dbg> usb_dfu.dfu_status_cb: USB device connected
00> [00:00:09.857,116] <inf> usb_cdc_acm: USB device suspended
00> [00:00:09.857,116] <dbg> usb_dfu.dfu_status_cb: USB device supended
00> [00:00:09.857,116] <dbg> usb_dfu.dfu_status_cb: USB device supended
00> [00:00:09.954,376] <inf> usb_cdc_acm: USB device resumed
00> [00:00:09.954,376] <dbg> usb_dfu.dfu_status_cb: USB device resumed
00> [00:00:09.954,376] <dbg> usb_dfu.dfu_status_cb: USB device resumed
00> [00:00:09.954,437] <dbg> usb_dfu.dfu_status_cb: USB device reset detected, state 0
00> [00:00:09.954,437] <dbg> usb_dfu.dfu_status_cb: USB device reset detected, state 0
00> [00:00:10.042,602] <dbg> usb_dfu.dfu_status_cb: USB device reset detected, state 0
00> [00:00:10.042,633] <dbg> usb_dfu.dfu_status_cb: USB device reset detected, state 0
00> [00:00:10.162,506] <inf> usb_cdc_acm: USB device configured
00> [00:00:10.162,506] <dbg> usb_dfu.dfu_status_cb: USB device configured
00> [00:00:10.162,506] <dbg> usb_dfu.dfu_status_cb: USB device configured
00> [00:00:16.430,236] <dbg> usb_dfu.dfu_status_cb: USB unknown state
00> [00:00:16.430,236] <dbg> usb_dfu.dfu_status_cb: USB unknown state