Autel EVO Max 4T / 4N RTK Setup: Custom NTRIP

Connect the Autel EVO Max 4T, 4N, and Alpha to RTKdata NTRIP corrections. Enable RTK, choose Custom Network RTK, and enter host, port, and AUTO mountpoint for centimeter RTK.

Connect Autel's current enterprise drones — the EVO Max 4T, EVO Max 4N, and Autel Alpha — to RTKdata.com's NTRIP correction service for centimeter-level positioning.

The EVO Max 4T / 4N require the optional Autel EVO Max RTK Module. A base EVO Max without the module has no RTK and cannot use RTKdata. The Autel Alpha has RTK built in (no module needed). For the older EVO II Pro RTK V3 / EVO II Enterprise (640T), see the separate Autel EVO II RTK guide.

The EVO Max series and Alpha are controlled by the Autel Enterprise App on the Smart Controller V3 — not the Autel Explorer app used by the older EVO II line. Menu names below refer to the Autel Enterprise App.

Requirements

• Aircraft: EVO Max 4T or 4N with the EVO Max RTK Module installed — or Autel Alpha (built-in RTK)

• Controller: Autel Smart Controller V3

• Software: Autel Enterprise App, updated to the latest version

• Firmware: Aircraft, RTK module (if applicable), and controller firmware updated to the latest version — version mismatches commonly break RTK

• Internet: Wi-Fi hotspot tethered to the controller (the controller relays the correction stream)

• RTKdata account: Active subscription with NTRIP credentials

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Step-by-step setup

1

Install the RTK module (EVO Max only)

On the EVO Max 4T / 4N, install the EVO Max RTK Module. On the Autel Alpha, RTK is built in — skip this step. Update aircraft, module, and Smart Controller V3 firmware to the latest version.

2

Connect the controller to the internet

Tether the Smart Controller V3 to a phone Wi-Fi hotspot (or other internet source). The controller, not the aircraft, carries the NTRIP stream.

3

Enable RTK

In the Autel Enterprise App, open Settings (gear icon) → RTK and turn the RTK Aircraft Feature ON.

4

Select Custom (not Network RTK)

Choose Custom (Custom Network RTK) as the correction source.

Do not select "Network RTK." That is a legacy option Autel does not operate and it will not connect to a third-party caster. All third-party casters, including RTKdata, use Custom.

5

Enter NTRIP connection settings

Select your region and enter the corresponding server details:

North America

• Host (domain): rtk.rtkdata.com

• Host (IP fallback): 13.56.117.10

• Port: 2101

• Username / Password: From RTK Credentials in the internal dashboard (not website login)

• Mountpoint (ALL CAPS): AUTO (recommended) — or AUTO_WGS84, AUTO_ITRF2020, AUTO_ITRF2014

Europe

Australia

Enter the mountpoint AUTO manually (in ALL CAPS) rather than relying on a station list — RTKdata's AUTO is keyed to your position, not a fixed station.

GGA must be sent. The RTKdata caster uses your GGA position to select the nearest reference station and stream single-baseline RTCM3 corrections. Without GGA, the drone connects but receives no corrections and stays on Float. RTKdata is single-baseline and location-keyed — it is not a VRS service. The aircraft must have a satellite fix (be outdoors) so it can report position. See NTRIP & GGA Essentials.

6

Connect and verify Fix

• Save/apply the settings to connect.

• Place the drone outdoors in an open area so the RTK system acquires satellites.

• Watch the RTK status in the live view:

Status	Meaning
SINGLE	Basic GNSS fix. No corrections applied yet.
FLOAT	Corrections received and processing. Accuracy improving.
FIX	Centimeter-level accuracy active (~1–2 cm).

Convergence typically takes 30–90 seconds in open sky.

Vertical reference (heights)

RTK corrections deliver ellipsoidal heights (height above the WGS 84 ellipsoid), not orthometric heights (mean sea level). If your workflow requires orthometric heights, apply a geoid model in your post-processing software.

Troubleshooting

Problem	Cause	Fix
Won't connect to caster	"Network RTK" selected instead of Custom	Switch the correction source to Custom
No RTK option at all	EVO Max RTK Module not installed/detected	Install the module (EVO Max) and confirm firmware is current; Alpha has built-in RTK
No corrections / stuck on Float	Drone indoors or no satellite fix → no GGA sent	Move outdoors to open sky so the aircraft acquires satellites and reports position
No corrections	No internet on the controller	Verify the Smart Controller V3 hotspot tether
Authentication fails	Wrong credentials	Re-enter username/password from the RTKdata dashboard (case-sensitive, username starts with rtk)
RTK keeps dropping	Firmware mismatch (aircraft / module / controller)	Update all three to the latest firmware

Tips

• EVO Max needs the RTK module; Alpha has RTK built in. First check which hardware you have.

• Always pick "Custom" for RTKdata — "Network RTK" is a non-functional legacy option.

• Enter AUTO manually in ALL CAPS as the mountpoint.

• Firmware first. Mismatched aircraft/module/controller firmware is the most common RTK failure on this platform.

• Different app from EVO II. EVO Max/Alpha use the Autel Enterprise App; the EVO II line uses Autel Explorer — don't reuse those screenshots.

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