Jon Watkins

Rainbow on a rainy day

Raspberry Pi Rainbow Screen Of Death: How To Stack Multiple HATS And Avoid Disaster

The “Rainbow Screen of Death” aka “Rainbow screen at boot” is that dreaded Rainbow screen that appears and doesn’t disappear when you boot up your Raspberry Pi. It gets stuck on the Rainbow. Its arrival is never a good sign.  Whilst there is a multitude of reasons for this to happen: Like outdated firmware on

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Reliable Embedded Systems: Using The Arduino Watchdog With Crash Tracking

The previous article in this series introduced the “Watchdog Timer “ as a tool to use to build more reliable systems; it will reset the Arduino processor in the event of the application locking up. However, as in medicine, this is like treating the symptom and not the cause. Why did the application lock-up in

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Reliable Embedded Systems: Using The Arduino Watchdog With Sleepy Pi

A previous article in the series introduced the concept of the Arduino Watchdog Timer and its value in developing more reliable embedded systems. When developing systems based on the Sleepy Pi platform, we make extensive use of an Arduino library to put the Arduino to sleep. In some cases, this library uses the watchdog internally

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Sleepy Pi 2 with Programming header

Configuring The GPIO Serial Port On Raspbian Jessie and Stretch Including Pi 3 and 4

** Updated for Raspberry Pi 4 ** This used to be relatively straightforward, but with move from Raspbian Wheezy to Raspbian Jessie, (and then Raspbian Stretch and Buster) things changed. Add to this, the newer Raspberry Pi 3 and 4 family with new hardware and the whole thing became a bit of a Dog’s Breakfast and issues with

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Raspberry PI and Sleepy Pi

Project: ARUPi – A Low-Cost Automated Recording Unit for Soundscape Ecologists

Anthony in Good’ol Blighty has built an Automated Recording Unit Pi (ARUPI) for recording Soundscapes in Ecology research. He’s created a detailed Instructable that shows how he’s built it. An ARUPI can be used to : monitor the birds in your garden or just to make nice recordings of the dawn chorus, without having to

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