Unboxing the GLRM #
How to turn on/off your GLRM? #
GLRM uses a touch sensor to turn on and off. The sensor is located on top of
the long white stripe.
To turn the GLRM on, the following touch sequence is used:
- Press the touch button for about 1 second or until you see the purple status
LED. - Release the touch button for a short period (≈0.5 s).
- Press the touch button again and hold for a minimum of 2 seconds or until the
status LED starts blink blue, indicating that the GLRM is now turned on and
in advertising mode.
GLRM can be turned off using the same sequence as for tuning on, or by sending
a shutdown command. Additionally, in order to save power, GLRM automatically
turns off after no connection was established for more than 30 minutes.
What do the LED indicators mean? #
GLRM uses three LEDs to indicate the current status of the receiver:
- LED1 (outer) is an RGB-LED and is used to indicate the current state of the
GLRM, also referred to as status LED. - LED2 (middle) is a blue LED which lights up once an RTK FIX solution is
obtained. - LED3 (inner) is an orange LED which starts blinking once GLRM has a valid
timestamp from GNSS.
How to charge your GLRM #
To charge your GLRM connect the USB port to a USB charger. GLRM automatically
detects the current mode provided by the charger and adjust its charging power
accordingly.
If GLRM is turned off, LED1 indicates the battery charging state by color: red
means battery low (below 20%), green means fully charged (above 95%) and orange
means in-between.
How to connect your GLRM to Geolantis #
Set Antenna height correctly! #
Using Telescope Pole #
Set the antenna height in Geolantis to your antenna pole height measurement (e.g. 2 m / 6.56 ft).
Using Mini Pole #
Set antenna height in Geolantis to 0.09 m / 0.30 ft when using the Mini Pole.
Video #
Step-by-Step Tutorial #
Android #
- Open a project in Collector
- From the Project Window – select the Setup icon
- Ensure NMEA Bluetooth device is checked
- Go to Device connections
- Select the GLRM from the dropdown list
- Click the BLE button and search your device
- Switch on Auto-connect (optional)
Geolantis will connect to the latest device on startup - Save this connection
- The device is now connected
- After the next start you can connect the GPS through the Bluetooth symbol or it will be connected automatically when Auto-connect was chosen.
- Select an NTRIP caster and dial in to receive RTK corrections
iOS #
- Open a project in Viewer/Collector
- From the Project Window – select the Setup icon
- Ensure the Enhanced BT/BLE Connections option is switched on
- Back on the Project window go to Bluetooth icon
- In Settings choose the GLRM option and search for your device
(enable “Auto Connect” if you want to connect to your device automatically on startup)
- Close to return to the Project window
- Select an NTRIP caster and dial in to receive RTK corrections
- Now you are ready to collect data
Troubleshooting #
Reset device #
If something went wrong and GLRM ends in an error state (LED1 is fast orange
blinking) or GLRM just doesn’t respond anymore, there is a hardware reset button.
To reset the GLRM, there is button hidden behind a small hole.
Press and hold this button for about 1 second to reset the GLRM. In order to reach
the button use a paperclip or sim card ejection clip from your phone.
Check on GL connect #
If you experience problems connecting your GLRM device, follow these steps:
- Check the Companion App
Download and open GL Connect by General Laser: - Start the App
Launch GL Connect on your mobile device. - Navigate to Connection
In the app menu, go to Connection. - Start Scanning
Tap Scan to search for available devices.
- Connect to Your Device
- Ensure your GLRM device is switched on.
- Select your device from the list to connect.
- Verify Positioning
After a short time, you should see:- Satellite signals
- Current position displayed
If It’s Still Not Working
- Reset the GLRM device (see instructions above).
- Force stop all apps on Android level.
- Restart your mobile device.
- Delete & reinstall the GL Connect app, then check all settings.
- Contact Support for further assistance.