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E61 — MDNS_WS_URL_PARSE_FAILED

mDNS discovery returned a result that could not be parsed as a valid WebSocket URL after 3 retries.

What happens​

The error is logged, the error log is saved to NVS, the stored Wi-Fi configuration is deleted from NVS (WIFI_NVS_KEY), and the device reboots after 1 second. On the next boot, the device will enter Wi-Fi setup mode because its credentials have been erased.

Possible causes​

  • The FKMTime server is not running or not advertising an mDNS service on the network.
  • Another device on the network is advertising an mDNS service with the same name as FKMTime, returning a malformed or unexpected response.
  • The FKMTime server version is incompatible with the device firmware and uses a different URL format.
  • The network blocks mDNS traffic (common on enterprise/managed networks).

How to fix​

  1. Ensure the FKMTime server is running — Confirm the server process is active and reachable on the same local network.
  2. Check for mDNS conflicts — Make sure no other device is advertising the same mDNS service name.
  3. Reconfigure Wi-Fi — Since credentials are erased on this error, enter setup mode after the reboot and re-enter Wi-Fi credentials. The device will attempt mDNS discovery again on the next connection.
  4. Check network mDNS support — On networks that block mDNS, configure the device to use a static server URL instead.