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GPS & Navigation (Optional)

SAMPATHI 1 supports the use of an external GPS module for position awareness and GPS-assisted features when used with Betaflight.

ℹ️ GPS usage is optional.
If you do not require GPS features, SAMPATHI 1 operates fully without a GPS module.

What GPS Can Do in Betaflight​

When a supported GPS module is connected and configured, Betaflight can provide:

  • GPS position data
  • Ground speed and distance information
  • GPS-based OSD elements (digital)
  • Limited GPS-assisted modes (depending on Betaflight version)

⚠️ Betaflight is primarily a manual and assisted flight firmware.
It is not intended for fully autonomous navigation.

Supported GPS Modules​

SAMPATHI 1 supports standard serial GPS modules commonly used with Betaflight.

Typical features:

  • UART-based communication
  • Integrated GNSS receiver (GPS / GNSS depending on module)
  • Optional external compass (magnetometer)

Use GPS modules that are known to be compatible with Betaflight.

Connecting a GPS Module​

  • Connect the GPS module to the designated GPS connector on SAMPATHI 1
  • Ensure correct orientation and secure mounting
  • Route GPS cables away from high-current power wires and motors

If your GPS module includes a compass:

  • Use an external compass rather than relying on onboard magnetic sensors
  • External placement reduces magnetic interference from motors and power wiring

Betaflight GPS Configuration​

After connecting the GPS module:

  • Open Betaflight Configurator
  • Go to the Ports tab
  • Enable GPS on the designated UART
  • Save and reboot

Then:

  • Go to the Configuration tab
  • Enable GPS
  • Select appropriate GPS protocol and settings
  • Save and reboot

Allow the GPS sufficient time to acquire satellites during first use.

GPS Lock and Usage Notes​

  • Initial GPS lock may take several minutes, especially during first use
  • GPS performance improves outdoors with a clear view of the sky
  • Avoid testing GPS indoors or near large metal structures

GPS-related information will be visible through:

  • Digital OSD elements
  • Betaflight telemetry (if enabled)

Limitations of GPS in Betaflight​

It is important to understand the limitations:

  • GPS in Betaflight is not a replacement for full navigation systems
  • Features such as waypoint missions or autonomous flight are not supported
  • GPS should be treated as an assistance and awareness feature, not a primary control method

Future Navigation Firmware Support​

SAMPATHI 1 hardware is designed with expandability in mind.

Support for the following firmware platforms is planned:

  • iNav — Porting under works
  • PX4 — Porting under works
  • ArduPilot — Porting under works

Once available, dedicated user guides for these platforms will be added to this documentation.

When to Use GPS on SAMPATHI 1​

GPS is recommended if you:

  • Want position awareness during flight
  • Use long-range or exploratory flight profiles
  • Want GPS data visible in digital OSD

GPS is not required for:

  • Racing
  • Freestyle
  • Indoor flight