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Internet of Things

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Great Reads

GFX Forever: The Complete Guide to GFX for IoT

by honey the codewitch

GFX is a fast and full featured replacement for standard IoT drawing libraries that is optimized to reduce bus I/O

Lightning Never Strikes Twice? Maybe Blitzortung knows!

by DaveAuld

Building for and consuming the Blitzortung Lightning Detection Network

Never Buy A Garage Door Remote Again: Open Your Door With Your Android Phone (via Bluetooth)

by raddevus

Steps for building a device you can add to your existing garage door, which implements an atmega328, bluetooth (hc-05) and relay module which will allow you to open your garage door from any paired Android device.

A PWM Based Fan Controller for Arduino

by honey the codewitch

Control 3 or 4 pin PWM fans using this library

Latest Articles

htcw_json: A tiny streaming JSON parser

by honey the codewitch

Stream JSON efficiently on little devices with minimal flash and memory usage

Tetris Wall Art for Arduino

by honey the codewitch

Display automated (optionally controllable) Tetris on an LCD or Neopixel panel

Getting Crafty With Graphics With Just Kilobytes of Flash and Almost No RAM

by honey the codewitch

Got an embedded or IoT widget with a screen but no real memory or flash space to speak of? Read this.

IoT Data Hub for Remote Edge Deployment

by deangi

IoT data edge hub is designed for remote low power unattended applications. IoT devices can post data to the Hub which will store the data and make it available for later download to core servers. Design is based on a low cost ESP32 platform with an attached SD card.

All Articles

Internet of Things

htcw_json: A tiny streaming JSON parser

31 Mar 2024 by honey the codewitch

Stream JSON efficiently on little devices with minimal flash and memory usage

Tetris Wall Art for Arduino

4 Mar 2024 by honey the codewitch

Display automated (optionally controllable) Tetris on an LCD or Neopixel panel

Getting Crafty With Graphics With Just Kilobytes of Flash and Almost No RAM

24 Feb 2024 by honey the codewitch

Got an embedded or IoT widget with a screen but no real memory or flash space to speak of? Read this.

IoT Data Hub for Remote Edge Deployment

10 Feb 2024 by deangi

IoT data edge hub is designed for remote low power unattended applications. IoT devices can post data to the Hub which will store the data and make it available for later download to core servers. Design is based on a low cost ESP32 platform with an attached SD card.

A DIY Time Lapse Photography Camera

17 Jan 2024 by deangi

The inexpensive ESP32 platform is used to take periodic photos that can make a time-lapse video.

Smart Home – Controlling Shelly® Devices (Part 4) - Property-Manipulation with the PropertyDescriptor

16 Jan 2024 by Ralf Meier

This article revolutionizes Shelly device management, providing an updated, efficient, and feature-rich solution for both beginners and advanced users." You will discover new ShellyCom2 features, such as property manipulation using PropertyDescriptor, and a set of valuable helpers and commands.

VisionFive 2 RISC-V - Setting up Apache2, Php, Postgres, Mosquitto, and Compilers

16 Dec 2023 by Richard Chambers

Creating a simple VisionFive 2 RISC-V SBC web site using Apache2, PHP, and Postgres with the Mosquitto message broker and installing Golang, Java, and Rust.

Smart Home – Controlling Shelly® Devices (Part 3)

13 Dec 2023 by Ralf Meier

The article walks through ShellySceneComponent and ShellyScenesComponent, which allow users to define scenes with multiple actions assigned to a control or controls for Shelly devices.

Setting Up a New VisionFive 2 RISC-V SBC

27 Nov 2023 by Richard Chambers

The VisionFive 2 RISC-V SBC is an alternative to the Raspberry Pi 4, however its software has some rough edges. I decided to write about my experience working with a series of Raspberry Pi 3 hobby experiments using the VisionFive.

rxcg: A Simple Text Matcher C Code Generator for IoT

15 Nov 2023 by honey the codewitch

Generate tight C code to match text based on regular expressions

regular-expression

Winduino: A Tool to Prototype Arduino Projects on the PC

30 Sep 2023 by honey the codewitch

Run and develop Arduino code, including a display, on PC using this Windows PC shim and emulator.

Running ASP.NET Core Web Server on Arm64

8 Sep 2023 by Dawid Borycki

This article demonstrates how you can use ASP.NET Core with Windows 11 to build a web server for a headless IoT application. You will gain insights into harnessing Arm64-powered devices that offer high performance while consuming minimal power for your IoT applications.

Porting EspMon to ZephyrOS on a STM32 Boards (or other boards, with a little work)

24 Jul 2023 by honey the codewitch

A crash course in using Zephyr RTOS with my IoT ecosystem

Industrial IoT based Machine Tool Condition Monitoring With GE Predix Time Series Ingestion And Data Streaming

22 May 2023 by Grasshopper.iics, Abhishek Nandy, Moumita Das

Industrial IoT time series data collection with GE Predix time series ingestion and data streaming

machine-learning

IoT-VR with Unity, Intel Edison

20 May 2023 by Grasshopper.iics, Abhishek Nandy, Moumita Das

Virtual Reality with Unity, Intel Edison and MQTT

Player: A Simple Cross Platform Audio Class for IoT

9 Apr 2023 by honey the codewitch

Mix wavs and waveforms with this simple to use library

Using the New ESP32 LCD Panel API With htcw_gfx and htcw_uix

20 Mar 2023 by honey the codewitch

Combine some great technologies for rich, responsive IoT user interfaces on the ESP32

i2cu Take Two: Serial and I2C Probe in a Handy Package

16 Mar 2023 by honey the codewitch

Debug your circuits with this handy device

i2cu: An I2C Bus Probe Tool for the TTGO T1 Display

13 Mar 2023 by honey the codewitch

Easily determine active devices on an I2C bus with this simple device

Need feedback on a screen formatting problem

12 Mar 2023 by honey the codewitch

Working on a weird problem. I'm making a serial probe to retrieve data off of a UART serial interface and display it on a little screen. That way you can take the probe wire and a ground wire and connect it to a circuit's serial transmit line...

Need feedback on a screen formatting problem

12 Mar 2023 by OriginalGriff

Switching mode by holding B is a good idea - I'd certainly prefer it to a autoswitch which can be annoying if you are trying to read text! It really depends on the size of the screen: It would be nice to have both in "hex view", in the same way...

Stateful Screen Rendering on Little Devices

26 Feb 2023 by honey the codewitch

How to make very responsive, flicker free interactive screens without using a lot of memory

TTGO Fan Take 2

10 Jan 2023 by honey the codewitch

A far more functional fan controller than before, and some powerful programming techniques

A TTGO Display T1 Based Fan Widget

9 Jan 2023 by honey the codewitch

A project that allows you to use a knob to control a fan's RPM with feedback

A PWM Based Fan Controller for Arduino

6 Jan 2023 by honey the codewitch

Control 3 or 4 pin PWM fans using this library

A Sonos Speaker System Remote for the TTGO T-Display v1

13 Dec 2022 by honey the codewitch

Control the sound from your Sonos system in each room of your house

A Tale of Two Buttons: Building an IoT Button Library for Arduino

9 Dec 2022 by honey the codewitch

Building a button library seems simple until it isn't.