I'm using s120_nrf51_ble_driver on PC.
To connect the BLE dongle, we need to COM port number to be known (parameter of sd_rpc_serial_port_name_set). Is there really no way to get rid of that when one single dongle is connected to the PC?
Can't the API propose a mode where dongle is automatically found and used (this could raise an error if 0 or more than 1 are found). s120_nrf51_ble_driver.dll should be able to scan all connected devices and identify the good one!