No, not the usual "should I have them fitted?" vs "no they're insecure!"
You may remember last year I opened up the in-house display for my smart
meters, and using a digital scope found an SPI bus where I could "sniff"
data between the main PCB and the RF transceiver daughterboard?
Well, today I finally got round to spending some time on it again, and I
now have a working method to passively tap the bus using an ESP8266
based arduino-ish board and capture the raw data :-)
I don't think I've written an interrupt service routine for over 30