Welcome to the Blues Developer Blog
Technical articles on everything in the Internet of Things, from Arduino to Zephyr. Written by developers, for developers.
Get Ready for Starnote by Trying NTN Mode Today
A look at the new Notecard firmware APIs that make Starnote possible, and how you can try them today.
Latest
Latest
Using Blues and Edge Impulse to Increase the Accuracy of Your Machine Learning Models
Learn how Edge Impulse and Blues combine to improve your ML models deployed on the edge.
Using an External GPS/GNSS Module with the Notecard
Learn how to use an external GPS Module with the Notecard, and how you might want to configure the Notecard based on your project.
Blog Archive
Behind the Amplifier - Meet Dishant Shah
Behind the Amplifier is a blog series where we highlight each of our awesome contributors, showcasing what they are working on, and sharing their thoughts on the IoT.
Debugging on STM32 and ESP32 with VS Code and PlatformIO
Get started debugging on STM32 and ESP32 microcontrollers with these simple instructions.
Writing Firmware That Works Across Cellular, Wi-Fi, and LoRa
Everything you need to know about writing host firmware that works with multiple radio access technologies
Behind the Amplifier - Bioinformatician Naveen Kumar
Behind the Amplifier is a blog series where we highlight each of our awesome contributors, showcasing what they are working on, and sharing their thoughts on the IoT. This edition features Naveen Kumar.
Launching Today: Notecard LoRa and the Blues LoRaWAN Starter Kit
Everything you need to know about the Notecard LoRa and Blues LoRaWAN Starter Kit—available today!
Understanding the Differences Between LTE-M, NB-IoT, and LTE Cat-1 for Cellular IoT
The Blues Notecard lets you pick the protocol best for your cellular IoT deployment.
Behind the Amplifier - From Maker to Scientist with Prasannaa Kumar
Behind the Amplifier is a blog series where we highlight each of our awesome contributors, showcasing what they are working on, and sharing their thoughts on the IoT. This edition features Prasannaa Kumar.
Using GPS/GNSS and Wi-Fi Triangulation Together Effectively
Learn how to use GPS/GNSS and Wi-Fi Triangulation together in the same project.
Behind the Amplifier - TinyML Enthusiast Justin Lutz
Behind the Amplifier is a blog series where we highlight each of our awesome contributors, showcasing what they are working on, and sharing their thoughts on the IoT. This edition features Justin Lutz.
6 Tips for Building Power-Efficient IoT Products with the Blues Notecard
Learn how to make the most out of the power-efficient nature of the Notecard within your IoT product.
M5Stack UIFlow Integration with Blues Notecard
A guide on how to use the Blues Notecard within the M5Stack UIFlow ecosystem.
Blues Award Winners from Hackster's Build2gether Inclusive Innovation Challenge
Check out the winners from Hackster's challenge who used the Notecard, Notehub, and Swan to build inclusive IoT prototypes.
Innovation Unleashed: A Recap of Maker Faire Hyderabad 2023 with Blues
A recap of the 2023 Hyderabad Maker Faire
Four Tips & Tricks for Becoming a Successful Firmware Developer
Learn a handful of tips & tricks that can help you become a more successful firmware developer.
Hackster Tutorial - Hands-On with Cellular IoT on the Raspberry Pi 5
This Hackster tutorial shows you how to add low-bandwidth cellular connectivity to the Raspberry Pi 5.
Dynamically Switching Wi-Fi Networks on a Notecard
Learn a technique you can use to switch a Notecard’s Wi-Fi network using environment variables.
Revolutionize Your Automation Game with Blues
Build your own home automation system using the Blues Notecard, Notehub, Node-RED, and Qubitro.
Sending and Receiving Binary Files with the Notecard and Notehub
Learn how to use the card.binary APIs to send and receive files from/to a Micro SD card using the Blues Notecard and Notehub.
Behind the Amplifier - A Passion for IoT with Ben Lim
Behind the Amplifier is a blog series where we highlight each of our awesome contributors, showcasing what they are working on, and sharing their thoughts on the IoT. This edition features Ben Lim.
The Easiest Way to Upgrade Raspberry Pi OS from Bullseye to Bookworm
Learn how to perform an in-place upgrade from Raspberry Pi Bullseye to Bookworm.
The Easy Way to Build Wi-Fi Products With a Cellular Fallback
Learn how to make Wi-Fi + cellular simple and secure with the Blues Notecard Cell+WiFi
Read and Write Images and Text Files with a Micro SD Card and Arduino
Learn how to use Arduino/C to read and write images and text files to a Micro SD card.
Use Rapid Prototyping to Speed Up Your Hardware Designs
Learn how to use rapid prototyping to speed up your development process.
Blues “Most Valuable Hackster” Round 2!
Build IoT projects with the Notecard, publish them on Hackster, and get paid!
Behind the Amplifier - Exploring Pradeep's IoT Journey
Behind the Amplifier is a new series where we highlight each of our awesome contributors, showcasing what they are working on, and sharing their thoughts on the IoT.
Blues Launches into LoRa at The Things Conference
Blues sees overwhelming interest in the new Notecard LoRa at the Things Conference in Amsterdam.
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
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.