Deep sleep does not work

[amotl]

Hi there,

@ClemensGruber reported at [1] that the deep sleep feature might have stopped working with one of the recent releases preceding September 2020.

With kind regards,
Andreas.

[1] https://community.hiveeyes.org/t/deep-sleep-funktioniert-im-aktuellen-2020-09-terkin-datalogger-nicht/3501