smart radio modem


The modem operates in the band from 865MHz to 870MHz.  The RF modem is very simple to use and provides a wireless RS232 link with a RF data rate of up to 100 kbps.

This type of module can work also at 866MHz (indian frequency).

The transceivers have the functions of a complete radio modem and simply require CMOS/TTL data at the transmit input and the corresponding transceiver(s) output the same data. Preamble and CRC are automatically generated and added to the RF transmission.
The RCQ3-868-RM can use any channel in 100 (200) KHz step.
Possible applications include one-to-one and multi-node wireless links in applications including security, EPOS, wireless sensor network, industrial process monitoring and computer networking.

It’s possible to set the frequency from 865MHz to 870MHz.

It's possible to set the RF Power from 0dBm to 14dBm.

The RCQ3-868-RM Radio Modem has applications in many areas where reliable half duplex communications are required over ranges up to 200 meters (with the maximum RF Power is possible to reach up to 400-500meters).
The crystal controlled narrow band design, in the embedded RCQ3-868-RM device, gives reliable performance within the 868 MHz band.
The addressing protocol employed enables many different configurations such including:

  • one-to-one operation: for point to point data communication;
  • broadcast operation: where a single master address many RCQ3-868-RM modules concurrently (using many RCQ3-868 modules set to the same address);
  • one-to-many: a network consisting a master and many slaves (the receivers all have the same address)
  • many-to-one: where the transmitters all send to a single receiver address

Since each RCQ3-868-RM can contain a unique address, multiple RCQ3-868-RM network can co-exist in the same area.

The Radio Modem RCQ3-868-RM is 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.

This application can be work in two modality :






Pin Out Device                                                                                         Mechanical Dimension 

Pads Name Description
1 GND Ground
9 GND Ground
10 VCC Power Supply
17 P1 Switch to enter Test Mode
24 K1 Button to active the Test Mode
25 01 Led Test Mode





Evaluation Board RCQ3-868-DK :  Using the following Evaluation Board you can verify all the RCQ3-868-RM feature immediately.


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