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Using a Qwiic UV Sensor with Zephyr

Using a Qwiic UV Sensor with Zephyr

The first sensor I connected to my BlueLora was a UV Sensor. It’s nice to know where high levels of UV are for killing Coronavirus, or for…
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Mark Zachmann
BlueLora: Mile-wide Sensor Networks

BlueLora: Mile-wide Sensor Networks

Imagine a wireless network that has a range of miles and which runs on a small battery for months. Now imagine what you could do if each…
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Mark Zachmann
Building Bluetooth Services in Zephyr

Building Bluetooth Services in Zephyr

Part 2: Implementing the Services
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Mark Zachmann
Building Bluetooth Services in Zephyr

Building Bluetooth Services in Zephyr

Part 1: Getting Started
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Mark Zachmann
LittleFs file support for QSPI flash in Zephyr

LittleFs file support for QSPI flash in Zephyr

The board I’m working on has 1MB of QSPI flash. That is serial flash that’s directly controlled by the Nordic nrf52840. See here ->
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Mark Zachmann
How to Develop Portable Applications (iPhone and Android)

How to Develop Portable Applications (iPhone and Android)

This is about Xamarin/C# but let me start describing why.
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Mark Zachmann
Using The Material Design Icons Webfont

Using The Material Design Icons Webfont

I’ve been using the Material Designs Icons webfont and can not find a summary of character code vs icon. So, I wrote a simple Net.js…
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Mark Zachmann
BlueLora Node on Kickstarter

BlueLora Node on Kickstarter

So, after 2 years of development I’ve decided to try to sell the BLE/LoRa node on Kickstarter. This is the unit (with slight mods) that I…
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Mark Zachmann
Reading Analog Data in Zephyr with a nrf52840

Reading Analog Data in Zephyr with a nrf52840

It turned out to be much harder to read the ADC in Zephyr than I expected. As usual the documentation is slim and the syntax was a little…
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Mark Zachmann
Using a PWM Device in Zephyr

Using a PWM Device in Zephyr

Using devices in Zephyr is tricky because there are so many options and settings at first that it’s just not clear from documentation and…
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Mark Zachmann
Run Zephyr on nrf52840 (Particle Xenon)

Run Zephyr on nrf52840 (Particle Xenon)

I’ve been experimenting with Nordic Semiconductor nrf52840 boards, first using Arduino, then naked NordicSemi SDK/C++ and now I’m looking…
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Mark Zachmann
Surface Mount on the Cheap

Surface Mount on the Cheap

Since I’ve been automating my surface mount board creation a summary of where things stand seemed interesting.
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Mark Zachmann
Cutting Vinyl with my CNC — Pick and Place machine

Cutting Vinyl with my CNC — Pick and Place machine

I’ve been prototyping product stickers and need an intricate shape with cutouts — and I have a CNC. Since my Pick and Place machine is…
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Mark Zachmann
A Pick and Place Machine for < $1000?

A Pick and Place Machine for < $1000?

I’m thinking about doing a Kickstarter for a dirt-cheap Pick and Place machine. I’ve been working on this for a few years and finally the…
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Mark Zachmann
How to run Marlin on the Cohesion 3d Remix

How to run Marlin on the Cohesion 3d Remix

Smoothieware just wouldn’t do what I needed (dual Y axis motors) so I decided to use Marlin instead. I really like the…
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Mark Zachmann
Using QSPI Flash with the Nordic NRF52 SDK

Using QSPI Flash with the Nordic NRF52 SDK

It turned out to be much harder to use the QSPI flash chip with the Nordic SDK than I expected. Mainly this is because their documentation…
Go to the profile of Mark Zachmann
Mark Zachmann
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