February 21, 2014

MultiPort APR

MultiPort was a project aimed to modify the frequency for GSM repeaters, remotely, at a certain date and time without human intervention.
The project was made for RCA Group, a major company in the communications. 

September 21, 2013

HK-2815, Ultra-low cost Data Link

In 2003, a big automatisation manufacturing company* ask us to research and develop a radio modem for some home equipments.
The radio modem has to be incorporated into gauge meters and has to be bi-directional in order to accept remote disconnect commands for the in-debt customers.
The main challenge was the price. It has to be under 5 EUR/unit at industrial scale, able to send secure data at 19 kbps on 432 MHz ISM band and no more than 20 x 20 x 4 mm.
The second main problem was the BER in real life environment.