Aplicom is a binary CAN/event dialect on TCP 5049. AplicomFrameDecoder feeds AplicomProtocolDecoder, which branches across event/CAN helpers (decodeEventData, decodeCanData, decodeD/E/H/EB/F). Cold-unit fields — diesel/electric hours, defrost temps, condenser/suction pressures, setpoints, activeAlarm, coldUnitState — are first-class in the open decoder.
Alarm hex is not a map bug
When activeAlarm / event data is present but coordinates look stale, treat it as an alarm/event frame class, not GPS failure.
Sibling contrast
Eelink on 5064 also carries binary IO, but Eelink’s old/new packages and BLE MAC tags are not Aplicom’s cold-unit vocabulary.
Catalogue stance
Traccar stock reference; Traxelio positions_only.