14:51:02INFOIoT Gateway: heartbeat OK — 16/18 devices online
14:51:01INFOTransaction TXN-4521 completed — LKR 4,200 — Diesel 12.1L
14:50:58WARND-004-N1: no heartbeat for 30s — marking OFFLINE
14:50:52INFOPump D-001 nozzle N2 activated
14:50:47ERRORD-004-N2: MODBUS timeout — retry 3/3 failed
14:50:45INFOPayment gateway: card auth OK — TXN-4520
14:50:40INFOTank TK-01 level updated: 8,420L (68%)
14:50:38WARNTank TK-03 level below 25% threshold — alert raised
14:50:32INFOScheduled backup started — destination: /backup/20260512
14:50:29INFOSMS service: OTP sent to +94 77x xxx 812
14:50:25INFOStaff attendance sync complete — 8 records
14:50:20ERRORD-004-N3: flow sensor read error — value out of range
14:50:18INFOTransaction TXN-4519 completed — LKR 2,870 — Petrol 92 8.3L
14:50:14WARNEmail queue: delivery retry for invoice INV-2026-0138
14:50:11INFOPOS terminal B01-POS-2 session started — cashier: K. Madusanka
14:50:05INFOIoT Gateway: firmware check — all online devices up-to-date
14:49:58WARNPayment gateway: card decline — TXN-4518 — insufficient funds
14:49:52INFOTank TK-02 dip reading recorded: 6,180L
14:49:48INFOLoyalty: points awarded — LYL-004 +320 pts (total: 12,400)
14:49:44INFODispenser D-002: nozzle N3 flow calibration OK
14:49:39ERRORDB: slow query detected — 2,340ms — SELECT transactions WHERE...
14:49:33INFOTransaction TXN-4517 completed — LKR 6,500 — Super Diesel 17.2L
14:49:28WARNIoT Gateway: D-006-N1 signal strength weak (-82 dBm)
14:49:22INFOSystem health check passed — all services nominal
14:49:17INFOBackup completed successfully — 24 files — 1.2GB