On November 23rd I was contacted by the Head of Marketing & BD of Onion, producers of the Omega IoT nodes. He asked whether I “would be interested in writing a blog about our product, the Omega2, the world’s first IoT Computer and a $5 Linux development board with built-in WiFi.” About a week before […]
I was recently contacted by a fellow Swiss IoT hacker about a new offering to transfer the NodeMCU firmware to ESP-01/07/12 modules. He created a self-contained hardware setup that allows you to easily to plug in those modules for the data transfer. There’s a Kickstarter campaign currently running to develope it beyond the state of […]
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NodeMCU on ESP8285 is a perfect match as I found out last night. Yes, you got that right NodeMCU on ESP8285 not ESP8266. In this post I’ll talk a little bit about Espressif’s new ESP8285, about a development board with that SoC and give you instructions how to run the NodeMCU firmware on it. It […]
This is just a quick heads-up to let you know that I’m working on a MAX7219 library for NodeMCU. In October last year I first experimented with MAX7219 8×8 matrix displays. Ever since then I wanted to create a library that would support daisy-chained displays and a few text animations. I finally kicked myself in […]
“How to validate email with PHP” is conceptually part of a bigger problem: accurately validating web forms including emails without sacrificing good UX. I’ll blog about that some other time. This post presents and dissects PHP code to validate email. The explanations and my reasoning should allow you to adjust the code to your needs […]
In this article I am going to review the book ”Building an IoT Node for less than 15 $” by Claus Kühnel. TL;DR “Building an IoT Node for less than 15 $” is the book I wish I had had when I started my endeavor into the IoT/ESP8266/NodeMCU world in May 2015. I covers everything […]
Looks like I need to update my popular article about ESP8266 development boards once again. I just found out that Adafruit sells what seems like a really cute development board with LiPo connector: the Adafruit Feather HUZZAH ESP8266, what a name. The ESP module seems to be an ESP-12E, it’s definitely got 4MB flash memory. […]
After a recent OS X update mangled my Mac Mini’s sharing setting I had to learn how to enable OS X screen sharing from the command line. Here’s how. One of the first articles my favorite search engine turned up was blog post on pivotal.io. It’s really helpful and attracted a few comments which give […]
Eclipse Mars introduce a terribly annoying feature that you can’t even turn off, sigh. If you now scroll up in the console Eclipse automatically activates scroll-lock. Hence, if you just browse the console output scroll-lock will be ON when you’re down browsing and leave the console. How awful is that? The implementation was triggered by […]