User Guide: RTK Portable Bluetooth Kit


The minimum that you need to achieve centimeter level precision.

RTK Portable Bluetooth Kit is ideal if you plan to use NTRIP corrections to achieve cm level positioning, it can be easily connected to a smartphone / tablet / computer via USB or Bluetooth.


Remember all the component parts of RTK Portable Bluetooth Kit includes:

The kit is pre-configuredto send NMEA over Bluetooth and USB at the same time, so you can start using it from the unboxing.

Have you got your new RTK Portable Bluetooth Kit? First things first, you are in the right page to get your kit set up quickly.


For building RTK Portable Bluetooth Kit you do not need any special tools or anything like that, it will be enough manually.

1. Connect RTK Receiver in plastic case and u-blox ANN-MB-00 antenna by winding it’s SMA connector.
2. Connect USB – type C cable to the type C board connector of the plastic case.

2. You can power RTK Receiver using your USB powerbank, smartphone, tablet, laptop or computer.

If you want to use the kit with laptop or PC, just connect USB connector to your device.

If you want to connect this kit to a mobile phone / tablet, you will need an USB on-the-go (OTG) cable.

3. Now you have your new RTK Portable Bluetooth Kit built and ready to function!

How to connect RTK receiver to the computer / PC?

Once you have your RTK Receiver connected to the PC via USB, you can follow simple steps, which we discribed in the video:

How to connect RTK receiver to smartphone or tablet?

We will explain how to use your Android device with RTK Portable Bluetooth Kit .

  1. Make sure your device supports Bluetooth 2.0 or has USB capabilities.
  2. Make sure your Android language is set to English, since some users reported compatibility problems with other languages.
  3. Place your RTK Portable Bluetooth Kit in a location with good view of the sky, or near a window for testing the functionality.
  4. Download compatible software/app  which you prefer to use from Google Play and install it in your device.
    We prepared step-by-step instructions how to use RTK Portable Bluetooth Kit with several software/app:

How to use RTK Portable Bluetooth Kit with SW Maps?

  1. Since you have a RTK capable GNSS receiver, let’s connect it to a NTRIP server to get cm accuracy. Go back to SW Maps menu and select NTRIP Connection
  2. Fill all the fields with your NTRIP provider data. Make sure to check Send NMEA GGA to NTRIP Caster if you are connecting to a VRS.
  3. When you click CONNECT, if everything worked, you will see the data stream alive.
  4. You can see some details of your Ardusimple receiver by going to the SW Maps menu and selecting GPS Status or Skyplot.
  5. In the main screen, you can click the button shown in the below picture to make the app center the map in your receiver location. The pointer showing your location will change its color depending on the fix status of your receiver. You can change the map layer, add points, tracks, export/import recorded locations and much more.
  6. You can get used to the SW Maps app by trying the different options, but if you are looking for a manual you can find it here:

How to use RTK Portable Bluetooth Kit with other software?

If you need to use RTK Portable Bluetooth Kit with any other software, we will explain how to configure RTK receiver to be used as mock location for Android smartphones/tablets in order to get centimeter position accuracy.

If you are not familiar with the term, mock location means that you cheat your Android device to use an external GNSS receiver as if it was its own internal one. This has the advantage that any GPS/GNSS app that works with your Android device can benefit of centimeter level accuracy.

Step 1:

This step only needs to be done once.
  1. We will use Lefebure NTRIP Client app both to get NTRIP corrections and to use mock location for Android. Go to the Play Store and install the app, we will configure it later.

Step 2:

This step only needs to be done once.
  1. To enable mock locations in Android we will need to get Developer permissions. The procedure may vary slightly between different Android versions and smartphone models (you can Google your “Smartphone model + enable mock location” if you can’t find the exact options).
  1. On Android 4.1 and lower, the Developer options screen is available by default. On Android 4.2 and higher, you must enable this screen. To enable developer options, tap the Build Number, MIUI version or similar option 7 times. You can find this option in one of the following locations, depending on your Android version:
    • Settings > About Phone > Build Number
    • Settings > System > About Phone > Build Number
  1. Once you have access to Developer options, you can go to Settings > Additional Settings and at the bottom you will find Developer options. In this big list, tap Select mock location app and select Lefebure NTRIP Client from the list.

Step 3:

  1. Power any of your professional kits by connecting their USB cable to your smartphone/tablet/power source. If you get any popup message to connect the USB device with any app, you can ignore it (unless you want to connect via USB OTG, which is covered in this other tutorial)
  1. Enable your smartphone/tablet Bluetooth, and pair it with your professional kit.
    When pairing your device, notice that it may appear as simpleRTK2B or as a generic MAC number (e.g.: F0:0A:95:9D:68:16). The password is always 1234. The pairing only needs to be done once.

Step 4:

  1. Open Lefebure NTRIP Client
  2. Click on the gear icon to enter the setup menu.
  3. Select Receiver Settings and set:
    • Receiver Connection to External via Bluetooth.
    • Bluetooth Device to the name of the simpleRTK2B BT connection.
    • GPS Mock Locations check.
    • You can also add the Antenna Height if you are performing high accuracy surveying tasks.
    • You can additionally log the GPS or NTRIP Data by checking the options.

  4. Go back to the main settings menu and select NTRIP settings.
  5. Set your NTRIP service credentials (Caster IP, Caster Port, Username and Password).

    These are Ardusimple credentials shown only as an example, use your own 🙂
    These settings need to be done only once unless you change your NTRIP credentials.
  6. Go to the main screen and click the CONNECT button.
  7. Once the connection with the server is stablished, the app will ask you to select the NTRIP station from which you want to receive the corrections.
  8. If everything is properly set you will see a yellow progress bar that will download corrections continuously.
    NTRIP smartphone step 6

Step 5:

  1. Open your favorite GPS/GNSS application and use it as usual. You will be using the external RTK GNSS receiver instead of the smartphone/tablet internal GPS receiver.
We have tested this functionality with many apps, you can find them in this link.

If you test it in other apps, you can send us an email at and we will add it to the list.

The Android robot is reproduced or modified from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License.

Now you are ready to survey and map!

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