John McLear Musings

The native ESPHome PN532 component works — until it doesn't.

I have been writing this blog since 2008.

I had a PN532 NFC Reader device on an ESP32 running ESPHome and wanted a way to notify Home Assistant if the Reader became unavailable (and therefore stop functioning).

As feed in tariffs are often offensively priced you might find that by using excess to dump into appliances you get better value of return than feeding back into the electricity grid.

TLDR; - Stopping losing heat is much easier than generating heat. - Thermal imaging is better than leak testing. - The power infrastructure in the UK is not ready. - Sourcing the correct RCBO for an inverter can be tricky and Lead times for Renewable items

https://youtu.be/0ZRr4iqNC1s Follow along!

Do you want to convert your Petrol or Diesel car to Electric?

I will be offline as of 26/3 for a bit.

UPDATE: Me Gusta!

This is feedback for the authors of the paper on "[Spacetime Characterization of Real-Time Collaborative Editing](https://github.com/ether/RTCE/blob/master/paper/cscw-2018-rtce.pdf)".

So you have a really-real time web app.

This is a how to guide / hack approach for storing Etherpad contents as git commits. ## Create git repo Using your favorite tool / platform.

I was asked in a [tweet](https://twitter.com/johnjohnston/status/1246346490257321984) to touch on the topics of Etherpad and Security.

I contribute to a collaborative editor tool, Etherpad.

This is a follow up post to a previous attempt at [hacking the Peugeot Ion immobilizer.]

This was a journey I went on with Duncan, Duncan deserves the props for the technical understanding of the car security, I was just the wrench monkey and author.

!

In this post I will explain why dual screen phones don't need to exist, how they could be improved and what you compromise by choosing one. # Yotaphone & e-ink I'm on my second dual screen phone, first up was the [Yotaphone which suffered on a few counts]…

Useful for making transfer/conversion plates, this SVG can be modified to suit but it should be usable as is.

While setting up some home automation I found the best way to remotely control my projector was to just hit up some conveniently exposed URIs.