Robot reports E11; this is often related to Wi-Fi or app connection issues on some Tesvor models.

Safety first: No electrical disassembly is required for basic troubleshooting.

Network checks:

• Ensure your router is broadcasting a 2.4 GHz network (most Tesvor robots do not support 5 GHz only).
• Move the charging dock closer to the router or reduce obstacles between them.
• Reset the robot's Wi-Fi settings using the button combination described in the user manual, then re-add the robot in the Tesvor app.

App and firmware:

• Update the Tesvor app to the latest version.
• Check for firmware updates for the robot once it is temporarily connected.

If E11 persists and other devices work fine on Wi-Fi: The internal Wi-Fi module or antenna may be faulty. Internal antenna cables are delicate; inspection and replacement should be done by a technician.