Tag 1: Basic Data
IMSI, Meter Number, Clock, Software Version, ICCID, Work Mode, Valve Status, Reset Stats
Tag 2: Realtime Data
Accumulative Volume, Forward/Backward Flow, Reading Time, Battery, Max Flow, Report Counts
Tag 5: Alarm Data
Alarm Type, Status, Trigger Time, Additional Value
Tag 6: Periodic Data
Start Time, Interval (minutes), Record Count, Flow Records (L per interval)
Tag 16: Frozen Data
Daily Frozen Volume/Time, Monthly Frozen Volume/Time
Tag 17: Valve Data
Valve Status (Open/Closed/Half-open/Abnormal), Valve Control
Tag 18: Pressure Data
Reading Time, Interval, Number of Points, Pressure Values
Processor Types
TCDO_ASCII — Device sends hex string over MQTT (e.g. "68383637...4116"). Most common format.
TCDO_BINARY — Device sends raw binary bytes. Converted to hex then decoded same as ASCII.
CBOR_SENDER — CBOR-encoded SenderPacket (GK-MDO protocol). Different data model.
Epoch: All timestamps in GMT+8 (device local). Epoch is Unix seconds.