Tag Archives: SMS

Improving the coverage of the sensor radio network

The SMS gateway worked between the sensor RF network and the mobile phone network. However, it lacked sensitivity, occasionally struggling to get a signal 20 yards away.

Ciseco OpenKontrol Gateway on lid of device, with Dallas 1307 RTC implemented

Ciseco OpenKontrol Gateway on lid of device, with Dallas 1307 RTC implemented

I mounted the OKG board on the lid of the box and the SMS board in the base, unwittingly placing the sensor RF receiver between two ground planes. And a mobile phone signal source in a similar part of the radio spectrum. Which was probably not the best way to get good performance out of the LLAP sensor radio – screen it and then desensitise it with a strong nearby signal. Oops. Continue reading