nRF Connect Error "NRF_ERROR_TIMEOUT"

[Alaa]

I plugged my nRF52 evaluation board to PC using a micro USB cable, dragged a ble_peripheral hex file from Nordic examples to the mounted JLINK drive, started up nRF Connect v2.2.1, launched Bluetooth Low Energy app, chose the recognized COM port, confirmed the message suggesting to program the kit with the required firmware, then I get this error:

10:28:35.9290 Connectivity firmware version 1.2.1 detected
10:28:35.9350 Opening adapter connected to COM39
10:28:36.4700 Successfully opened COM39. Baud rate: 1000000. Flow control: none. Parity: none.
10:28:36.4730 Reset performed on adapter COM39
10:28:38.4770 Error occured when opening port. Errorcode: NRF_ERROR_TIMEOUT (0xd)

Environment:
Windows 7
nRF Connect v2.2.1
PCA10040, V1.2.1
Tried hex file: ble_app_uart_s132_pca10040.hex , ble_app_alert_notification_s132_pca10040.hex

Thanks

[Hung Bui]

Note that you need 2 boards to test with NRFConnect. One board you plug into PC so nRFConnect use that board as the BLE hardware (nRFConnect won't use the integrated BLE chip on the PC ). And on the second board you flash the peripheral hex file. The second board is the Device Under Test, the first board is the tester needed for NRFConnect.

But you need to test if the UART communication between PC and the tester board works fine as I suggested above.