Build an MCU-controlled application that reads from an external sensor and sends readings to the Notecard to start building your IoT application using Cellular, Wi-Fi, LoRa, or Satellite connectivity.

Sensor Tutorial

Introduction

Set up Hardware

Create a Notehub Project

Write Firmware

View Data in Notehub

Use Environment Variables

Next Steps

Collecting Sensor Data

Learn how to connect Blues Notecard applications to third-party cloud services using Notehub Routes and Cellular, Wi-Fi, LoRa, or Satellite connectivity.

Routing Data to Cloud

Create a Route

Use JSONata to Transform JSON

Route to an External Service

Build Data Visualizations

Learn how to build an Edge AI application using Blues Swan, Notecard, and Edge Impulse.

Building Edge AI Applications

Before You Start

Forwarding Data to Edge Impulse

Build and Train an ML Model

Test the Model

Deploy the Model

Sending Inference Data to the Cloud With the Notecard

A set of best practices for building production-ready wireless IoT projects with Blues Notecard and Notehub.

Best Practices for Production-Ready Projects

Configure Your Notecard for Low-Power Usage

Use Note Templates

Use Environment Variables to Store Configuration

Allow for Host Firmware Updates

Create a Provisioning Process

Guide for creating Notehub Routes to Twilio SMS messaging services

Twilio SMS Guide

Prerequisites

Configuring the Route

Customize with Placeholder Variables and JSONata

Testing the Route

Debugging the Route

An overview of managing fleets of Blues Notecard devices using Notehub. This guide covers the basics of fleet management, including creating and managing fleets, assigning devices to fleets, and monitoring device status.

Fleet Administrator's Guide

Device Information

Event Information

Session Information

Data Handling

Firmware Management

Organizational Tooling

Hardware Specific QR Codes

Fleet Admin Guide

A short tutorial on how to use the Notehub API to manage your IoT devices and applications remotely.

Using the Notehub API

Authenticating

Retrieving Devices and Events

Adding Notes

Managing Fleets

A list of all guides for using the Blues Notecard to build IoT applications with Cellular, Wi-Fi, LoRa, or Satellite connectivity.

Guide Listing

A guide for building an asset tracking solution with Blues Notecard and GPS/GNSS, communicating over Cellular, Wi-Fi, LoRa, or Satellite.

Asset Tracking with GPS

What You Need to Get Started

Tracker Configuration Requests

Configure a Standalone Tracker

Configure a Host-Controlled Tracker

Viewing Tracker Data

Routing Tracker Data to Third-Party Services

Advanced Tracker Configurations

Taking an Immediate Reading

Configuring the Notecard attention pin on the Blues Swan and Notecarrier F.

Notecard Attention Guide

Notecard Interrupt

Hardware Setup

Firmware Breakdown

ESP32 Interrupt Handling

Additional Resources

Attention Pin Guide

Learn how to connect a Notecard WiFi to a Wi-Fi Access Point

Connecting to a Wi-Fi Access Point

Using a Notecard API Command

Using Your Smartphone

Validating Your Wi-Fi Connection

Specifying Multiple Access Points

Common Connection Failure Issues

Learn how to use the TTL-232R-RPI debug cable from FTDI to debug a Blues Notecard.

Debugging Notecard with the FTDI Debug Cable

Connecting the FTDI Cable

Setting Up a Terminal Program

Issuing an API Request

Debugging with the FTDI Debug Cable

A guide for diagnosing and resolving a variety of common LTE Cat-1, LTE Cat-1 bis, LTE-M, and NB-IoT cellular connectivity issues with the Notecard.

Diagnosing Cellular Connectivity Issues

Verify Antenna Usage and Placement

Check Cellular Signal Quality

Check Country Compatibility

Diagnosing GPS Issues

Avoid Simultaneous Usage of Cellular and GPS

Verify Antenna Connection and Device Placement

Encrypting and Decrypting Data with Blues Notecard

Device to Cloud Overview

Device to Cloud Walkthrough

Cloud to Device Overview

Cloud to Device Walkthrough

Encrypting and Decrypting Data with the Notecard

Setting up your Feather MCU to run in low power mode

Feather MCU Low Power Management

Arduino Low Power Library

Using Notecard to Control Host MCU Power

How to configure Notehub.io and your Notecard to minimize latency

Minimizing Latency

Overview

Configuring Notehub Interactions

Outbound Operations

Using Inbound Signals

Considerations and patterns for communication with the Notecard without a library.

Notecard Communication Without a Library

Basic Communications

Arduino Example

Summary

Instructions for recovering a bricked Notecard using Notecarrier A or Notecarrier F.

Recovering a Bricked Notecard

A guide to sending commands to one or more Notecards from the cloud over cellular, Wi-Fi, LoRa, or Satellite.

Remote Command and Control

Sending Commands to Devices

Receiving Commands on a Device

Receiving Commands on a Host

A guide to both sending and receiving large binary objects using the card.binary APIs.

Sending and Receiving Large Binary Objects

Sending Large Binary Objects

Receiving Large Binary Objects

Binary Uploads with Web APIs

Serial-Over-I2C Protocol

What is I2C

Transaction Structure

Data Query

Data Read

Data Write

Transaction Walkthrough

Overview of Environment Variables in Notecard and Notehub and how to integrate them in your IoT application.

Understanding Environment Variables

The Hierarchy of Environment Variables

Setting Environment Variables

Deleting Environment Variables

Reserved Environment Variables

Learn how and why a Notecard may enter a penalty box after repeated cellular network or GPS failures.

Understanding Notecard Penalty Boxes

Types of Penalty Boxes

Insufficient Power Supply

Network Registration Failure

Inability to Connect to Notehub

Inability to Acquire GPS Satellite Fix

Guide for using Notehub and the Notecard for performing Host firmware updates over-the-air to maintain your connected IoT application.

Updating Host Firmware

Preparing the Arduino IDE

Overview of the Host DFU Process

Adding DFU Capabilities to Firmware

Creating a Firmware Revision

Initiating a Host DFU from Notehub

Tracking DFU Progress

Updating ESP32 Host Firmware

Setting up your external SIM card to use with Blues Notecard to connect to other cellular networks.

Using External SIM Cards

Configuring the Notecard

Failing Over to a Different SIM

Frequently Asked Questions

A brief overview of JSONata and how it can be used in Notehub to transform JSON data routed from your IoT application over Cellular, Wi-Fi, LoRa, or Satellite.