Grundig Sonoclock 890 Web Firmware Update Repack Jun 2026

The original web update required a specific HTTP POST header that only Grundig’s Java applet could generate. The repack uses a inside a batch file to replicate that header. It forces the Sonoclock 890 to enter "Bootloader Mode" where it accepts the .bin file without version checking.

Grundig Sonoclock 890A-Web fails reading the station list · Issue #137 grundig sonoclock 890 web firmware update repack

showing "Communication Error" or failing to load your favorite stations? You aren't alone. As older internet radio servers shut down or change their protocols, these high-quality kitchen radios can lose their best features. The original web update required a specific HTTP