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Designing a Tracker You Rarely Touch: Lessons from Building GPT12-X Ultra
GPT12-X Ultra Designing a Tracker You Rarely Touch: Lessons from Building GPT12-X Ultra
November 20, 2025 6 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
Three Signals Reshaping Supply-Chain Telemetry in 2025: Smart Dry Containers, Responsible AI, and Real-Time Cold Chains
Asset Tracking
Three Signals Reshaping Supply-Chain Telemetry in 2025: Smart Dry Containers, Responsible AI, and Real-Time Cold Chains
Discover how smart dry containers, ethical AI governance and real-time cold chain monitoring are reshaping supply-chain telemetry in 2025.
Apple Ko
10 min read min read
Designing Battery Compliance into Cellular Asset Trackers – Practical Strategies for Engineers
Asset Tracking
Designing Battery Compliance into Cellular Asset Trackers – Practical Strategies for Engineers
Comprehensive guide to designing battery compliance for cellular asset trackers, covering IEC/UN regulations, lithium chemistry selection, UN 38.3 test strategies, packaging, firmware ship modes and change management.
Apple Ko
8 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
Operational Playbooks for Long-Life LTE-M/NB-IoT Trackers: Real-World Guidelines
Asset Tracking
Operational Playbooks for Long-Life LTE-M/NB-IoT Trackers: Real-World Guidelines
Practical guide for designing long-life LTE-M/NB-IoT asset trackers, with playbooks for fleet, cold chain, fixed assets, and container tracking, focusing on power management, GNSS, eDRX, and operational best practices.
Apple Ko
15 min read min read
Designing Battery-Sipping Cellular Trackers: An Engineer’s Playbook
Logistics
Designing Battery-Sipping Cellular Trackers: An Engineer’s Playbook
Field guide to designing ultra-low-power IoT trackers for logistics: covers RF design, power budgeting, payload schemas, manufacturing QA and deployment.
Apple Ko
10 min read min read
Turning Real-World Logistics Into Real-Time Actions: Ultra-Low-Power Asset Tracking from Eelink
Asset Tracking
Turning Real-World Logistics Into Real-Time Actions: Ultra-Low-Power Asset Tracking from Eelink
Discover how Eelink’s ultra-low-power asset trackers with Nordic nRF9160 bring real-time visibility to pallets, containers, and cold chains in Dallas and beyond. Learn about hardware, MQTT, Real-Time Wake, and dual-manufacturing advantages.
Apple Ko
5 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

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