About Me

I can be reached via email to paul [at] sullivan [dot] za [dot] org

I work in Information and Communication Technology (ICT) and live in Dorking, Surrey.

I'm originally from East London in South Africa, having also lived in Cape Town and the London Borough of Sutton.

Current Interests

This is what I do with some of my spare time - within the last 12 months

• Monitoring RMS power consumption with an SCT-013 and ADS1115
• Using Docker Containers to generate load to be used for Load Testing a RESTful API.
• 12v off grid solar to supply only low voltage DC needs
• Short video production - I make holiday videos no one watches
• Realtime and historic Geospatial data.  I've been using OsmAnd to log live route data to a web service and Bings's maps API to plot that data with JQPlot. In late 2019 I've finally integrated all this knowledge into a Follow Me system with it's own dedicated APK.

Previous interests

(but still periodically re-visited, or some how connected)

• Streaming data with HTTP/1.1 Transfer-Encoding: Chunked
• Creating a Doppler Radar Alarm with a Raspberry Pi and RCWL-0516
• Prepared statements with PostgreSQL & NodeJS when using idleTimeoutMillis / connectionTimeoutMillis
• Offloading / parallelization of compute tasks to NVIDIA GPUs using CUDA, specificlaly monte carlo simulations for Structured Product underlyings
• Mobile device security - in the light of the huawei (snooping) kerfuffle this is particularly interesting.  AKA LinageOS on my S5
• CAN Bus Hacking and OBD-II adventures, mostly on my Volvo C30 1.6d DRIVEe
• Scene monitoring with a Raspberry Pi (4 Model B) + camera using ImageMagick's compare to recognise passing motor vehicle with a bash script.  (This isn't motion detection, and is a better place to start to understand than OpenCV base solutions)
• Multi-factor Authentication - particularly client-side SSL certificates and TOTP as posession factors
• A study of how not to DDOS your own distributed web application
• Open source telephony, particularly around mobile applications
• Using the Raspberry Pi as an Ocilloscope.
• Getting myself back up and running after installing CyanogenMod on my S3
• Nagios, as a system monitoring / exception reporting tool - notably to check more realistically than the default "is it alive".