I have two nrf51822 devices with sniffer firmware. At the beginning all tests were well, it can sniffs beacon packets with ble-sniffer_win_1.0.1_1111_Sniffer and display packets detail in wireshark. However once I start the ble-sniffer again, it cannot detect the device anymore. Even if I change another nrf51822 dongle or change the USB port, it gives the same result. The window is like this:
It keeps scanning without any result. Can anyone help me?