
Welcome to the Blues Developer Blog
Technical articles on everything in the Internet of Things, from Arduino to Zephyr. Written by developers, for developers.
Blues Launches into LoRa at The Things Conference

Blues sees overwhelming interest in the new Notecard LoRa at the Things Conference in Amsterdam.
Latest
Latest
Establishing a Robust MLOps Workflow for TinyML
Create a workflow for continuously improving machine learning models on remote devices.


Cellular, Wi-Fi, LoRa — The Next Generation of Notecards
Everything you need to know about the new Cell+WiFi, WiFi, and LoRa Notecards


Blog Archive
Announcing the Notecard Developer Firmware Release v5.3.1
Learn about the new features included in the latest Notecard developer firmware release.


Blues at Fab23 Bhutan
With support from Blues.io, I gave a workshop at the Fab23 conference in Bhutan, showcasing the power of TinyML using Blues, even in remote locations.


Digitalizing the Wild with Blues
Explore a creative solution to help prevent human-wildlife conflicts with LoRa and Blues Cellular IoT.


Building a Connected Clock with Blues and the Raspberry Pi Pico
Learn how to make web requests with the Notecard and use Timer Interrupts on Micropython whilst building a clock.


How It's Made — Manufacturing Notecard at Scale
Take a virtual visit to our manufacturing facility to see how Notecard is made.


Don't AT Me — Use a Modern JSON API Instead
Notecard uses a JSON API to make IoT application development faster, more intuitive, and more maintainable than developing with AT commands.


New Notehub Features You May Have Missed
Get caught up on some of the most recently released Notehub features.


Add Reliable Power Backup to Notecard with Scoop
The all new Scoop features a Lithium-Ion Capacitor to provide Notecard with backup power and a lower self-discharge rate than traditional LiPo batteries.


Getting Started with Blues Notecard and the Raspberry Pi Pico
Learn how to add an affordable cellular option to your Raspberry Pi Pico.


Integrating Waylay with the Blues Notehub
Learn more about Waylay and how to integrate it within your IoT solution.


When to Use Tadiran (Li-SOCl2) vs Lithium Polymer (LiPo) Batteries in IoT Applications
A high-level comparison of Tadiran Li-SOCl2 batteries and Lithium Polymer (LiPo) batteries.


How We Unit Test Embedded C Code at Blues
Use the Blues approach to unit testing in your next embedded C project.


Use Cell Tower and Wi-Fi Triangulation to Achieve Pin-Point Locations, Without GPS
Learn how to use the Notecard to ascertain location information via cell tower and/or Wi-Fi access point triangulation, when GPS is unavailable.


How to Build an Asset Tracker With Geofence-Driven Alerts
Learn how to build an asset tracking solution that can take GPS readings, and send out alerts when the tracker leaves a configured geofence.


Easiest Way to Add Cellular to an ESP32 IoT Project
Learn how to add affordable prepaid cellular to an ESP32-based IoT solution


10 Examples to Help You Learn JSONata
Learn JSONata through a series of examples of the language in action


Easiest Way to Add Cellular to the Raspberry Pi Zero 2
Learn how to add an affordable cellular option to your Raspberry Pi Zero.


The Idiot-Proof Guide to Upgrading Raspberry Pi from Buster to Bullseye
Learn how to perform an in-place upgrade of your Raspberry Pi OS from Buster to Bullseye.


A Practical Look at PIO on the Raspberry Pi Pico
Learn more about using Programmable I/O on the Raspberry Pi Pico microcontroller.


Encrypt and Securely Deliver Data over Cellular
You can now encrypt Notecard data before it is securely routed to your cloud application.


Optimizing Raspberry Pi Power Consumption
Tips and tricks for optimizing the power consumption of a Raspberry Pi to make it a candidate for off-grid remote monitoring.

