Internet connected fire/smoke alarm project

This project is an upgrade to a previous project of mine – the DIY IoT smoke alarm. It is a more advanced version that uses dedicated hardware rather than the generic “Funky” project + external components. In essence, the module integrates into cheap smoke detectors and provides wireless event transmission plus periodic battery measurements to…

High security key fob project

This project is about creating a high-security keyfob using Atmel’s¬†ATSHA204¬†hardware authentication device. It was inspired by this post about security and signing. Many modern key fobs use various security techniques to prevent replay attacks, yet it turns out it is possible to hack even rolling codes. To solve this problem and have a key fob…