and in the tracker-server.log:
2018-04-25 13:25:21 DEBUG: [8888F3FA: 5055 < 10.100.100.5] HEX: 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
2018-04-25 13:25:21 DEBUG: [8888F3FA: 5055 > 10.100.100.5] HEX: 485454502f312e3120323030204f4b0d0a436f6e74656e742d4c656e6774683a20300d0a0d0a
2018-04-25 13:25:21 WARN: [8888F3FA] error - NullPointerException (DeviceManager:326 < *:315 < OverspeedEventHandler:103 < BaseEventHandler:28 < ...)
2018-04-25 13:25:21 INFO: [8888F3FA] disconnected
Hello,
IllegalArgumentException occurs when setting Total Distance of a Device
what I missed?