Tasmota / Sonoff continiously changed from Online to Offline

  • chagned the Tasmota FW from the Thing “sonoff_S20_00” from 6.4.1 to FW 6.4.0
  • power cycle of sonoff device “sonoff_S20_00”
  • restarted OH
  • power cycle of RPI
  • I not oblivious experimented or changed something in the sleep settings… I don’t now how?

All above have no impact on the issue:

2019-02-13 19:20:30.754 [vent.ItemStateChangedEvent] - Wohnzimmer_Leselampe_Reachable changed from Online to Offline
2019-02-13 19:20:30.876 [vent.ItemStateChangedEvent] - UV_Einfahrt_Switch01_Reachable changed from Online to Offline
2019-02-13 19:20:31.133 [vent.ItemStateChangedEvent] - Wohnzimmer_Leselampe_Reachable changed from Offline to Online

Here the snippet of my Items:

Switch Wohnzimmer_Leselampe             "Leselampe [MAP(de.map):%s]"    (gLicht) ["Lighting"]       {channel="mqtt:topic:sonoff_S20_00:POWER"}
Number Wohnzimmer_Leselampe_RSSI        "WiFi RSSI: [%d %%]"                                        {channel="mqtt:topic:sonoff_S20_00:RSSI"}
String Wohnzimmer_Leselampe_Uptime      "Aktiv seit: [%s]"                                          {channel="mqtt:topic:sonoff_S20_00:UPTIME"}
String Wohnzimmer_Leselampe_Reachable   "Status: [%s]"                                              {channel="mqtt:topic:sonoff_S20_00:REACH"}
String Wohnzimmer_Leselampe_VCC         "Vcc:[%s V]"                                                {channel="mqtt:topic:sonoff_S20_00:VCC"}                                        
String Wohnzimmer_Leselampe_IP          "IP:[%s]"                                                   {channel="mqtt:topic:sonoff_S20_00:IP"}
String Wohnzimmer_Leselampe_Hostname    "Hostname:[%s]"                                             {channel="mqtt:topic:sonoff_S20_00:HOST"}
String Wohnzimmer_Leselampe_SW          "SW-Version:[%s]"                                           {channel="mqtt:topic:sonoff_S20_00:SW"}
String Wohnzimmer_Leselampe_RESET       "Reset"                                                     {channel="mqtt:topic:sonoff_S20_00:RESET"}

Has anyone an idea how I can solve these continuous online offline messages on some Sonoff / Tasmota devices?