We have recently realized N.3 wireless Radio Modem, with this device is possible to realize a simple wireless RS232 link .
This device are based on the CC1310 device from Texas Instrument, this device can be work also in Long Range Mode (LRM) that is a particulary encoding technique that trades data rate for sensitivity gains. These gains are achieved by digital coding. For more information you can consult this document : http://www.ti.com/lit/an/swra642/swra642.pdf
When aiming at lower sensitivity values, you have the option of reducing the symbol rates transmitted over the air.
Reducing the symbol rate normally implies a lower signal bandwidth.
The products developped are the following :
- RCQ3-868-RM in the Band from 867÷870MHz.
- RCQ3-434-RM in the Band from 430-435MHz.
- RCQ3-915-RM in the Band from 912-917MHz.
To develop yours application, you can buy the following evaluation board :