VHF Radio Packet Modem


The VHF Radio Packet Modem (RPM1) is a low cost intelligent radio packet modem that enables a two way radio network/link to be simply implemented between a number of digital devices.

Download Product Spec



  • Addressable point-to-point mode
  • Point-to-Multipoint and broadcast modes
  • Inverted RS232 interface at 5V or 3.3V CMOS level
  • DTE speed 600-115200bps
  • Overall throughput: 3.7kbps with ACK and5.3kbps wothout ACK
  • Single 5V or 3.3V (10mW max.) supply
  • Flow control – Hardware (CTS), none
  • Usable range over 1km
  • Built-in command line configuration
  • Built-in RF link diagnostics
  • Remote over-air unit configuration
  • Low operating current, Auto standby mode
  • Conforms to European ETSI EN 300 220-3 and EN 301 489-3 (at 10mW)
  • Conforms to Australian/New Zealand AS/NZS 4268:2003 (at 100mW)
  • Dimensions – 39 X 23 X 15 mm
  • Available as RPM1T transmitter and RPM1R receiver for one way communication


  • GPS (NMEA) position reporting
  • Telemetry and telecontrol
  • EPOS equipment, barcode scanners, belt clip printers, stock control, job allocation
  • Remote data acquisition system, data loggers
  • In-building environmental monitoring and control system
  • High-end security and alarm signalling
  • Automated Monitoring and Control Systems
  • Fleet management, vehicle data acquisition

Please Note Disclaimer:

Lemos International does not assume any responsibility for errors nor any liability arising from the application or use of any sub-assemblies purchased through Lemos International, including fitness for any particular application.

The purchaser must satisfy all relevant FCC and Radio Regulations which applies to their finished product in the country of intended use. These modules transmit and/or receive radio signals and may not function as intended if interference is present.

Downloads & Datasheets

  1. Full Specs PDF


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