ANTHBOT Error E304: Positioning and Re-Localization Failure
Error E304 is diagnosed through the positioning environment, RTK station status and the mower re-localization process.
Reviewed October 7, 2026 by RobotMower.help. Independent guidance checked against the official support source linked below.
Quick answer
Move the mower to open, flat ground, confirm the RTK light is solid green and resolve any earlier code before restarting.
E304 at a glance
| Mower | ANTHBOT robot mower |
|---|---|
| Code | E304 |
| What the official steps point to | Positioning or re-localization failure |
What E304 means
ANTHBOT says E304 often appears when the mower starts from the charging station and begins positioning. The mower and RTK station both need open surroundings, and earlier errors can prevent re-localization from completing.
Fix ANTHBOT robot mower E304 step by step
- 1. Move the mower away from walls, eaves, fences and tall bushes.
- 2. Confirm the charging station also sits in an open location.
- 3. Check that the RTK base station light is solid green.
- 4. Place the mower on open, flat ground with nothing blocking it.
- 5. Review the app for an earlier E201, E204, E400 or E410 alert and resolve that first.
- 6. Restart once and allow the mower to complete re-localization without interruption.
Check these conditions before resetting anything
- The RTK antenna has power and clear sky exposure.
- The mower is not starting on a slope.
- The camera and mower path are unobstructed.
- Earlier alerts are not being ignored.
Do not remap until you know whether the mower simply failed to re-localize because of its starting environment or an earlier code.
How to verify the fix
The mower should complete positioning after startup and enter a ready state without E304.
If the same code returns, record the exact time, mower location, indicator status and any earlier alert. That sequence is more useful to support than repeated resets.
When to contact support
Contact ANTHBOT if E304 persists on open, flat ground with a solid-green RTK station. Send app screenshots and installation photos.
Frequently asked questions
Why does E304 happen near the charger?
ANTHBOT says it often appears when the mower starts at the station and begins positioning.
Should I check earlier errors?
Yes. Resolve preceding codes such as E201, E204, E400 or E410 first.
Does the mower need flat ground?
Yes. The official steps recommend open, flat ground during re-localization.
Related robot mower help
Source and scope
Primary reference: official ANTHBOT support guidance for E304.
RobotMower.help is independent and is not affiliated with or endorsed by ANTHBOT. This guide explains owner-safe checks and does not replace the manufacturer manual or professional service.