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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.

Simulate an External GPS module with the Notecard AUX Pins banner

September 12, 2025

Simulate an External GPS module with the Notecard AUX Pins

Use a NMEA GPS/GNSS simulator to mock location data for testing Notecard applications.

August 28, 2025

Remotely Manage Notecards with Reserved Environment Variables

Learn how to utilize certain environment variables to remotely configure fleets of Notecards.

August 5, 2025

Take Advantage of JSONata 2.0.6 in Your Notehub Routes

Learn more about the recent JSONata runtime upgrade in Notehub.

July 30, 2025

Detecting Anomalous Devices With Notehub Smart Fleets

A guide to using Notehub smart fleets to automatically detect anomalous devices—such as those that are tipped, tampered with, or reporting faulty sensor data.

July 7, 2025

Taking Payments with Stripe and Notecard

Learn how to use Stripe Payment Links and Notecard to easily take payments with your IoT system.

June 25, 2025

Using Batch Jobs to Automate Notehub Workflows

Learn how to use batch jobs to make project-wide changes, generate reports, provision devices, and more.

June 10, 2025

Perform Notecard Outboard Firmware Updates with GitHub Actions

Use the Notehub ODFU GitHub Action to stage updates to the firmware of your Notecard host.