Cheap tweeting RFID home security/automation system V1.5

CONCEPT One of the first things we bought when we founded our hackerspace was a cheep RFID access control system. The original plan was just to connect it to an electric lock on the door and access the space whithout a traditional key. We soon realised that the stuff in our space is not cheap […]

USB aliases – Multiple USB to UART devices on OpenWRT

If you want to add multiple Arduino or other USB to UART devices to your Openwrt router you will need to symlink them so that the devices don’t mix up while the router reboots. Our objective is to symlink /dev/ttyUSB0, /dev/ttyUSB1 … to /dev/device0, /dev/device1… In our example we will use a setup with an […]

RTL-SDR: Softverski Definirani Radio za manje od 100kn

USB DVB-T prijemnici koji su utemeljeni na tehnologiji RTL2832U čipa mogu se koristiti kao jeftini softverski definirani radio s kojim je moguće hvatati sve od meteoroloških stanica, satelita ili GPS-a, pa sve do ham radio prijenosa sa međunarodne svemirske postaje. Na slikama je moguće vidjeti dio signala za daljinsko upravljanje električnim instalacijama na 433 MHz […]