recover transfer errors via empty-pkt sync reply
first release of v5 hardware
Add additional API interfaces for dev
Fix OTA error message
Add sha256 checksum for cache control
Add Korean language support 2#
Make restoring factory functionality more robust. #2
Edit: prompt for invalid font file; Preview: automatically select the duplicated crop box.
Lock midpoint while zooming; Update demo project.
take care when wifi.conf was wrong