My door control and alarm system has made some progress. The main change is making access control a bit more distinct from alarm system. T...
DoH and VPNs and trust
We live in a strange world - where trust is a complex issue. Once upon a time we would all trust the "authorities", i.e. the pol...
Amazon do a lot right, but sometimes they do some of the simple things wrong. Getting it right They are quite good at showing when they c...
What if I eat it all?
How is it that food labelling does not require a column for "what if I eat it all?". How hard is that? This is a typical examp...
Soft RS485 UART using interrupts on ESP8266
My non technical readers can skip this :-) Background As you will have noticed, I have made a complete access control and alarm system b...
Choosing interface for PN532 (I²C, SPI or HSU) to ESP8266
I have been working with ESP8266 controllers and NFC readers. My preferred reader is the PN532 based Elechouse reader. As I have noted befor...
I knocked up a library
So I have made a library from scratch today for NXP MIFARE DESFire cards using AES. Been a long day. But here it is: https://github.com/...
NXP MIFARE DESFire EV1 for access control
Earlier this week I set myself the task of understanding the NXP MIFARE DESFire cards. This was more of a challenge than you may expect ...
Tipping the scales
I am getting really good at upgrading the scales to do WiFi now, and read cards. The card of choice is a Monzo card which works perfectly ...
Door entry system
I have been playing with a door entry system, as you will have seen, and there are several steps like choosing processor, and voltage regu...
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