We developed alarm centers for civil security system. Distance communication has been developed with a FSK transmission system that sends encrypted codes on a switched network to allow user identification. Choosing a microprocessor architecture we designed the whole Hardware section and the control Software, focusing in particular on the production.
We developed a double modulation transmission system, between devices communicating at 433 MHz and 868 MHz, with an anti-blinding device, making the system non-influenceable by other transmissions on the same carrier. We also have been commissioned a data transfer and alert system, using UMTS network, to specific numbers memorized in the system.
For another field company, we developed passive transponder readers with RFID technology and RS485 a/o Serial network interface. The implementation of a proprietary communication protocol allows more units to be linked, access control and a maximum reading distance of 10cm.