IoT Connectivity Hardware for Engineers

Just send JSON over I2C or UART, it's so simple.

Hardware chip image

Focus on building the best hardware, not reinventing connectivity

  • Pre-built hardware module provides out-of-the-box global cellular connectivity (or Wi-Fi).
  • Securely moves data from your product to your preferred cloud apps, and back again.
  • Manage data from multiple devices or fleets from a single dashboard.
  • Freedom from subscriptions, contracts, and annoying setup, disconnect, reconnect, and other monthly per-device fees.
View Notecards View Guides
Overlapping cellular and Wi-Fi Notecards

Simplify Your Security Audit

Bi-directional data between Notecards and Notehub

The Blues Wireless System

  • Blues hardware is pre-certified for FCC and PTCRB.
  • Off-the-internet cellular communications available in 135+ countries. Avoid the need for IT-managed Wi-Fi networks.
Read more about security at Blues

Control Data Visibility From Edge to Cloud

3 Steps to IoT Device Connectivity


Add Blues Wireless Notecard to your product with your preferred hardware.

Explore our Hardware

Our simple JSON interface allows you to connect and send data with 2 commands.

Explore our Firmware

With Blues Wireless Notehub, enjoy secure, bidirectional data flow between your device and your cloud app.

Explore our Cloud Capabilities
Communication diagram between MCU and Cloud

Built by Engineers for Engineers

  • Quickly connect via I2C or UART for easy integration on existing, or new device designs
  • Compatible with 3.3v and 1.8v systems
  • Onboard cryptographic element and built-in with factory-installed ECC P-384 certificate
JSON request into Notehub and the Notehub data from that event

Solution Components

An integrated, Low-Power Cellular Data Pump

SIM card
Embedded SIM with pre-provisioned network access
Onboard ultra-low-power ARM® Cortex®‐M4 MCU with 2MB Flash
Wi-Fi signal
High-performance 3-axis accelerometer and temp sensor
Regulator ensures consistent draw over battery, solar, or USB
High-performance cellular and GNSS/GPS module
Password input
Secure element with embedded keys and certificates

How to Evaluate Blues Wireless in 30 Minutes or Less

With Blues Wireless, you'll never worry about monthly or consumption fees. Each billing account is refreshed to 5,000 credits each month with the ability to purchase more.

  • Development starter kits

    You can pick a starter kit based on ESP32, Raspberry Pi, or our own feather-compatible microcontroller Swan.

  • Development starter kits

    Plug the Notecard into the provided Notecarrier, then connect to your existing hardware.

  • Development starter kits

    Follow along with our quickstart. In 30 minutes, you'll have a device connected to the global cellular data network, and data flowing from device to cloud, and back to device again.

  • Development starter kits
    • Feather kit and Swan kit contain MCUs. If you want our Raspberry Pi kit, you'll need your own Pi.
    • Swan lets you write code in C/C++, Arduino, and CircuitPython. It's also a powerful MCU and ready to run on edge-based machine learning like Edge Impulse. We have a guide for that.

Project Ideas

Take a look at some sample projects you can make with Blues Wireless. We provide full instructions, BOM, and helpful videos and tips.

Customer Stories

We’re making IoT quick and easy.

Start your IoT journey with us!