Have you tried this DCF77 Emulator app? https://play.google.com/store/apps/details?id=jp.houryo.dcf77emulator https://play.google.com/store/apps/details?id=jp.

Have you tried this DCF77 Emulator app? https://play.google.com/store/apps/details?id=jp.houryo.dcf77emulator https://play.google.com/store/apps/details?id=jp.houryo.dcf7... Haven't taken the time to do it myself but it was from HN that I learned about it.