Eos GNSS frequently asked questions FAQ

Do I need to upgrade my receiver to the latest firmware?

Summer 2026 Update:
Since over-the-air (OTA) firmware updates were released in 2026, you can now check for a GNSS Receiver Engine Firmware update directly in the Eos Tools Pro app. Open the Settings menu and look for the GNSS Receiver Firmware section. If an update is available, a red notification circle will appear.

iOS users: See step 6 in this guide.

Android users: See step 5 in this guide.

These same articles will also walk you through performing an OTA GNSS Receiver Engine Firmware update if one is needed.

To determine if you need to upgrade your receiver firmware, you first want to check if you already have the latest firmware. Firmware is based on model:

Skadi Series™ Models:

Skadi Gold™ — current firmware: 6.1Aa01.

Skadi 300™ — current firmware: 6.1Aa01.

Skadi 200™ — current firmware: 6.1Aa01.

Skadi 100™ — current firmware: 6.1Aa01.


Arrow Series® — Plus Models:

Arrow Gold+® — current firmware: 6.1Aa01.

Arrow 300+® — current firmware: 6.1Aa01.

Arrow 200+® — current firmware: 6.1Aa01.

Arrow 100+® — current firmware: 6.1Aa01.


Arrow Series — Legacy Models:

Arrow Gold® — current firmware: 6.1Aa01.

Arrow 200® (serial number starting with 189xxxxx) — current firmware: 5.9Aa08.

Arrow 200 (serial number starting with 216xxxxx or 2355xxxx) — current firmware: 6.1Aa01.

Arrow 100® (serial number starting with 183xxxxx) — current firmware: 6.0Aa01.

Arrow 100 (serial number starting with 216xxxxx or 2355xxxx) — current firmware: 6.1Aa01.

Arrow Lite® (serial number starting with 81xxxxx) — current firmware: 6.8Qg24p.

Arrow Lite (serial number starting with 216xxxxx or 2355xxxx) — current firmware: 6.1Aa01.


Check your firmware by going to the “About” menu of Eos Tools Pro. If your firmware does not match the above, then we recommend contacting our technical support team for instructions on how to upgrade your firmware.

Still Need Help? Contact Technical Support

If you are still unable to resolve your issue, reach out to our tech support team.

< Main FAQ Page