If you turn off the serial interface and subsequently lose WiFi connection to the EC device, the only way to reconfigure it is to perform a ‘hard reset’.
1Plug the device into your computer and insert a hairpin into the Reset aperture on the side. The device state indicator turns white to show that reset has started.
2Hold for 10 seconds. The EC device will produce a white flash.
3Remove the hairpin. The firmware is restored to its initial state.
4Reconfigure the EC device with EmbroideryHub.