© Microhard Systems Inc.
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4.0 Operating Modes
4.2 Data Mode
The normal operational state of all deployed Nano modules. In this mode the module is prepared to
exchange data as per its configuration settings. Available LED indications can provide an indication
of the data exchange (TX and RX LEDs).
To enter DATA mode from COMMAND mode, enter the command:
ATA [Enter]
The following three modes are the ‘radio network’ roles (see Section 6.2, S101):
4.3 Master
One per network, the source of synchronization for the system. The Master controls the flow of data
through the system; all data passes to or through it.
4.4 Repeater
Required only if necessary to establish a radio path between a Master and Slave(s); stores and for-
wards the data sent to it. Synchronizes to Master and provides synchronization to ‘downstream’
units.
If a local device is attached to a Repeater’s serial data port, the Repeater will also behave as a Slave
(aka Repeater/Slave).
Adding one or more Repeaters within a network will HALVE the throughput; the throughput is halved
only once, i.e. it does not decrease with the addition of more Repeaters.
If there is a ‘path’ requirement to provide Repeater functionality, but throughput is critical, this may be
accomplished by placing two modems at the Repeater site in a ‘back-to-back’ configuration. One mo-
dem would be configured as a Slave in the ‘upstream’ network; the other a Master (or Slave) in the
‘downstream’ network. Local connection between the modems would be accomplished with a ‘null
modem’ cable. Each modem would require its own antenna; careful consideration should be given
with respect to antenna placement and modem configuration.
4.5 Slave
Endpoint/node within a network to which a local device is attached. Communicates with Master either
directly or through one or more Repeaters. See Sections 5.3 and 5.4 for information regarding ‘Slave
-
to-Slave’ communications.
