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Welcome to the Blues Developer Blog

Technical articles on everything in the Internet of Things, from Arduino to Zephyr. Written by developers, for developers.

Protect User Privacy with Notecard Location Fuzzing banner

September 25, 2026

Protect User Privacy with Notecard Location Fuzzing

Your product may need to know where it is, but your customers probably don't want it reporting their street address. Learn how Notecard can obfuscate location data.

September 2, 2026

What’s New in Notehub—September 2026 Edition

A look at what we’ve shipped in Notehub recently, including the Notehub IQ beta, two-factor authentication, customizable table columns, and new filtering options.

September 1, 2026

Notehub IQ Tips & Tricks

A look at some tips & tricks I’ve learned from using Notehub IQ over the last month, including useful ways to work with session data, powerful workflows and automations, and more.

August 26, 2026

Keep API Keys Off the Device: Use Authenticated Web Calls via Proxy Routes

Stop including secret keys on your devices! Notehub proxy routes let your credentials live in the cloud while the device stays anonymous.

August 11, 2026

Cut Your Data Usage in Half with Notefile Templates

Every JSON Note you send ships its field names alongside its values, over and over, for the life of the device. Notefile templates tell Notecard to store and transmit fixed-length binary records instead.

July 28, 2026

Introducing Notehub IQ: Use AI to Talk to Your Products

Ask questions about your deployed products in plain language and get answers back from the data you already collect — through the Notehub MCP, with no data pipeline to build.

July 14, 2026

Interrupt-Driven IoT with the Notecard ATTN Pin

Unnecessary polling is where battery-powered IoT quietly bleeds power. Here's how Notecard's ATTN pin lets a host MCU remain in deep sleep at µA levels and wake only when something actually happens.