Getting started with LoRa(WAN)

Tags: Embedded, Network, Wireless

It seems that LoRa(WAN) in general tends to be quite a source of confusion for those starting out with this technology. For starters, there is the difference between LoRa and LoRaWAN that are absolutely fundamental but often these terms are used interchangeably. In addition, there are many different starter kits and devices out there that are not necessarily compatible with each other. The need to build up a gateway network alongside building actual communicating devices doesn’t really help to make this all straight forward. Hopefully this text can help clear some of the confusion and get people to build both infrastructure and things (pun intended) on top of this promising network technology.

Slightly Smaller Still...

Tags: ARM, Electronics, Tracker

...and with even more features than before. 

Matchbox 2017

Some Thoughts on Securing IoT Devices

Tags: Cryptography, Embedded, Programming, Security

Security in the Internet of Things (IoT) leaves much to be desired. Some of the recent DDoS attacks such as those through Mirai on DNS provider Dyn or on popular security site KrebsonSecurity have been possible due to weak security measures in things like network connected cameras. There are many reasons why the situation is what it is today, but that will not be the topic of this entry. While we have seen some initiatives, notably the security guidelines (PDF) by NIST and some comments made by Bruce Schneier, I feel that this leaves a lot of people wondering what practical measures to take to secure their devices. Many companies in the IoT are start-ups lacking a proper understanding of what security in the embedded field entails, and might lack (or didn't plan for) the budget to hire dedicated security people. The goal of this blog entry are to (hopefully) lift the veil on some of the methodologies that should be employed to create more secure IoT systems from a very practical point of view.


Standard Peripherals Library vs CMSIS vs HAL vs Low Level Library

Tags: ARM, C, Electronics, Embedded, Programming

The STM32 line of microcontrollers offer a bunch of features in a nice package at reasonable cost, something I like. What I don't like as much are the development libraries around it provided by ST. For this reason, most of the time I stick to writing code using the 'Cortex Microcontroller Software Interface Standard' (CMSIS) and the datasheet, and this works nicely but can be slow to develop. While it's still my personal favorite, I recently checked out the other options to see where things are going to do the prep work for some ports of older projects built using the 'Standard Peripherals Library' to newer processors such as the STM32L4.




Anyone Can Code...

Tags: Other, Programming

Every time I hear the "everybody can code" line...

Anyone Can Code