Apple Ko Blog – Logistics & Ultra-Low-Power Tech

Cold Chain

Why GNSS Dies Inside a Reefer Container — and What Actually Works

A sealed reefer is close to the worst RF environment a positioning device can face. The physics of why GNSS fails inside, why the cellular link survives, and the fallback chain — Wi-Fi scan, cell-ID, disciplined logging — that working trackers actually use.

Apple Ko

10 min read min read

Cold Chain

Why Cold Kills Cargo Trackers First: An Engineer's Field Notes

A tracker that goes silent in a frozen lane usually isn't out of battery — it's cold. Field notes on lithium below zero: brownouts, plating, chemistry choices, and why the best fix is often where you mount the device.

Apple Ko

8 min read min read

Cold Chain

The tracker on the truck was never watching your cargo

A clean reefer log and a rejected load are not a contradiction — they are two accurate measurements of two different objects. What cargo-level evidence is, why vehicle-mounted coverage ends at the dock door, and the four questions most hardware evaluation briefs have no row for.

Apple Ko

11 min read min read

Cold Chain

Summer Cold Chain Stress Test: Why Sensor Placement Wins

Summer heat exposes the blind spots in cold chain monitoring. Why sensor placement and the physics of heat, not dashboards, decide whether your temperature data survives the season.

Apple Ko

8 min read min read

Cold Chain

What Does Supply Chain Visibility Hardware Actually Prove? Condition, Asset, and Custody Evidence Explained

Supply chain visibility hardware generates three types of evidence — condition, asset, and custody — that move IoT devices from simple tracking tools to regulatory-grade documentation systems.

Apple Ko

11 min read min read

Cold Chain

The Physical Layer Nobody's Talking About: Why FSMA 204 Compliance Breaks at the Sensor Level

Most FSMA 204 compliance roadmaps treat hardware as an afterthought. The rule's data requirements depend on whether sensors survive the environment, maintain connectivity, and bind observations to lot codes.

Apple Ko

5 min read min read

Supply Chain

From Tracking to Evidence: What Visibility Hardware Is For

Location has been commoditized. Across pharma, food and 3PL, visibility hardware is now judged on whether its records survive a quality review, an audit or a dispute — condition, asset and custody evidence rather than dots on a map.

Apple Ko

9 min read min read

Cold Chain

BLE Temperature Loggers: Closing Cold Chain Data Gaps

Cold chain failures often aren't about the temperature breach, they're about the missing record. Here's how reusable BLE temperature loggers close the data gap with on-device logging, light/tamper sensing, and audit-ready exports, and how to choose one.

Apple Ko

9 min read min read

cold-chain

Why Cold Chain Visibility Breaks at Every Handoff

Cold chain failures cluster at the handoffs between custody, not inside the reefer. Where visibility breaks across pallet, container, and reefer trailer — and what it takes to keep one continuous record across every leg.

Apple Ko

9 min read min read

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