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From Readings to Evidence: Building Audit-Ready Cold Chain Telemetry for Overseas Freezer and Reefer Routes
Cold Chain From Readings to Evidence: Building Audit-Ready Cold Chain Telemetry for Overseas Freezer and Reefer Routes

Turn raw cold chain sensor data into audit-ready evidence. Define excursions, ensure continuity, correlate signals, and pilot compliance.

January 29, 2026 4 min read min read
📄 Latest Articles
Designing Multi-Year LTE-M / NB-IoT Asset Trackers: A Technical Deep Dive into GPT12-X Ultra
LTE-M
Designing Multi-Year LTE-M / NB-IoT Asset Trackers: A Technical Deep Dive into GPT12-X Ultra
Technical deep dive into multi-year LTE-M/NB-IoT trackers like GPT12-X Ultra: explore SoC choices, power architecture, GNSS duty-cycling, firmware modes and cloud protocols.
Apple Ko
5 min read min read
Designing a Palm‑Sized, Field‑Hard IoT Tracker: Engineering Notes on the GPT12‑X Ultra
Asset Tracking
Designing a Palm‑Sized, Field‑Hard IoT Tracker: Engineering Notes on the GPT12‑X Ultra
Comprehensive engineering notes on the GPT12‑X Ultra, a palm‑sized IoT asset tracker using Nordic nRF9161. Learn about RF design, thermal and power management, durability, NB‑IoT/LTE‑M bands, and how we balanced constraints to achieve years‑long tracking.
Apple Ko
8 min read min read
GPT12-X: The 4G Asset Tracker You Can Forget About for Years
4G
GPT12-X: The 4G Asset Tracker You Can Forget About for Years
The GPT12-X multi-year 4G asset tracker explained in plain English: features, modes, battery life vs reporting intervals, installation tips, and supported LTE-M/NB-IoT bands for global coverage.
Apple Ko
3 min read min read
Release 18 Changed the Conversation—Not the Physics: A Pragmatic Guide to LTE-M, RedCap, and Deep-Indoor Tracking
IoT
Release 18 Changed the Conversation—Not the Physics: A Pragmatic Guide to LTE-M, RedCap, and Deep-Indoor Tracking
Learn how 3GPP Release 18 reshapes IoT tracking — and why Eelink's next-gen GPT trackers combine LTE-M endurance with RedCap precision for deep-indoor visibility and power-efficient performance.
Apple Ko
8 min read min read
Satellite-Free Container Tracking for Ocean Freight: Design, Architecture & Deployment
Ocean freight tracking
Satellite-Free Container Tracking for Ocean Freight: Design, Architecture & Deployment
How to achieve ocean container visibility without satellite: GNSS logging on device, coastal cellular uploads, and cloud inference for audits and alerts.
Apple Ko
30 min read min read