RPM3-914-17-RPS datasheet(12/15 Pages) RADIOMETRIX

12 / 15 page

Radiometrix Ltd.

UHF FM Radio Packet Modem

page 12

4.2 Remote Configuration

Remote configuration of a RPM3 module is possible using the REMOTE command from within the

configurator. The remote RPM3 unit should be on or in auto-standby mode.

Initially the REMOTE command is used to enable and disable the ability to remotely configure a module,

as described in section 3.2: User Configurable Command.

Once remote configuration is enabled the REMOTE command is then used to issue configuration

commands to a remote RPM3. The format for the remote command then becomes:

REMOTE

The <SERIAL NUMBER> of the remote RPM3 must be known in order for the remote configuration

request to be executed on the appropriate RPM3 module.

The <COMMAND> to be executed can be any of the following:

Baud 600,1200,2400,4800,9600,19200,38400,57600,115200

Unit 0 to 15

Site 0 to 7

Shdn on/off

Flow hw/none

Serdly 2 to 255

Retry 1 to 63

Strtmsg on/off

The <PARAMETER> is optional, and if not specified the setting for that command is returned and

displayed.

4.3 POINT-TO-MULTIPOINT

The RPM3 can be used for point-to-multipoint communications. One module must be considered to be the

master, which is used to address up to 15 remote units in any one site.

During normal operation, the base unit can be set to address another unit dynamically by entering the

configurator and using the ADDR command to change the unit address. Upon execution of this command,

provided the parameters are correct, the configurator is exited immediately. A period (‘.’) is sent to the

connected host device to indicate that the change has been registered and the RPM3 is now ready for

communications to the new unit address.

ADDR is very similar to the Unit command, except that ADDR does not update the stored EEPROM unit

value. As the EEPROM has a limited number of write cycles, using ADDR for addressing multiple units in

a point to multipoint network is recommended. Also, the ADDR command will exit the configurator

immediately, which is required to resume communications very quickly.

4.4 BROADCAST MULTIDROP

The RPM3 has a broadcast mutidrop mode which provides a mechanism for building a large networks.

This mode of operation is determined by the configuration command keyword ACKMODE being set to

OFF.

In broadcast mutidrop mode, the RPM3 does not implement network layer functionality related to data

packet routing, acknowledgement and retries. The connected host device should provide network layer

functionality.

The site code and unit address is still used by the radio modem when working in broadcast multidrop

mode. For a given multipoint network all radio modems within a group must contain the same site code

and unit address.

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