# Connect to a Private Reference Station

When using a private, physical reference station in the field, select the "Use Private ReferenceStation" tab. The following parameters must be configured to ensure that SpatialLightHouse properly collects data from the reference station:

![Use Private ReferenceStation tab interface](/files/-LRsNDo8kElVvsxxs8FB)

## USB/Serial

This option allows you to connect to the reference station via a USB, serial or Bluetooth port. However, since most modern computers no longer include serial ports, many reference stations will create a virtual serial port after being connected via USB or Bluetooth. If you are connecting to a CHC X900+ via Bluetooth, the passkey is 1234. Additionally, make sure to select the correct outgoing COM port in SpatialLightHouse.

![Bluetooth COM Ports settings in Windows with example COM ports](/files/-LRsNYOZKw_ZGhoa7gFg)

|          |                                                                                                                                                                                                                                             |
| -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Scan     | Scans for available USB/Serial/Bluetooth COM ports.                                                                                                                                                                                         |
| COM Port | The port through which SpatialLightHouse will communicate with the reference station.                                                                                                                                                       |
| Speed    | Rate at which information is transferred through serial communication. Must match the baud rate of the serial port. This is only required for real serial ports, not for virtual serial ports created through USB or Bluetooth connections. |

## TCP/IP

This option allows you to connect to the reference station via TCP/IP.

|                     |                                                                  |
| ------------------- | ---------------------------------------------------------------- |
| Hostname/IP Address | The hostname or IP address of the reference station.             |
| Port                | The port number of the reference station. Default value is 5000. |

## Model

This option provides a list of the reference stations currently supported by SpatialLightHouse. When the Generic (passthrough) option is selected, the options to configure the reference station are disabled.

* Generic (passthrough)
* Leica GS14
* NovAtel
* CHC X900+Bluetooth
* CHC X900+Cable (10-Pin LEMO to USB/RS232 serial port cable)

## Configure Reference Station (Position/Output)

This checkbox allows you to manually configure the position of the reference station as well as the output method of communication between the rover and the reference station. This option can be left unchecked when the reference station is already fixed to a position and configured to emit differential corrections and raw observations. This option is only enabled if a reference station model other than “Generic (passthrough)” is chosen.


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