Found one little glitch overnight: if the receiver is switched to deep sleep you’ll get this in the log:
...
2020-05-03 04:31:20.548 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:31:35.561 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:31:48.623 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:32:01.711 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:32:14.799 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:32:27.887 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:32:40.975 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:32:54.063 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:33:07.151 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:33:20.239 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:33:33.327 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:33:46.415 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
2020-05-03 04:33:59.503 [WARN ] [nding.enigma2.internal.Enigma2Client] - Error on transmit http://192.168.2.25/web/powerstate.
...
Although this message is correct because of deep sleep mode it floods the openhab.log with a warning every refresh interval.