Arduino Pro Mini

ATtiny - Back to basics

After a few years using Arduino Pro Minis and now recently ATmega328P-PU chips, I have started playing with the ATtiny85/84. As as programmer this was very confusing. I just assumed I could program the ATtiny the same way as the ATmega328. Oh, was I wrong. I spent countless hours trying to get things to work. I didn't find much info online for my problems either.

X10 PIR sensor for RFXCOM transceiver

After a lot of experimentation, research and prototyping, I finally have all the parts I need to finish my PIR sensors. I plan to have one in each room, well almost.

They will have two functions. Primarily they will be used to track us and switch lights and heating (Nexa remote switches) as appropriate when we are home. The switching will follow certain rules, like time of day, who is home, weekday, weekend etc. When no one is home, they will be part of the security system and notify us, using Pushbullet, if they sense movement while we are not home. Both functions will be controlled by DomotiGa running on a Raspberry Pi, using a RFXCOM rfxtrx433e USB transceiver.

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