User's Manual

CHAPTER 3
PROGRAMMING ESTEEM FEATURES
Revised: 27 March 01
3-2
Listed in this chapter are the major ESTeem features and
programming examples on how to use them. These
features are individual building blocks to solve your
application needs. Remember your particular application
may require one or more of these features enabled.
DIGI-REPEATING
The Repeater feature allows an ESTeem to relay it's
respective transmission or packet through a maximum of
three ESTeems to increase the operating range of the
unit. Any ESTeem in your radio network can function as
a repeater for any other ESTeem. This is independent of
the fact that the ESTeem being used as a repeater is
linked or connected to another node, therefore an
ESTeem can function as a repeater, operational node, or
both at the same time. The data that is digi-repeated
through an ESTeem will not be output through the
repeating ESTeem’s RS-232C port.
To specify one or more ESTeems as repeaters, the
CONNECT command has been expanded to except up to
three added addresses as follows:
CONN r1,r2,r3,da
r1 = Address (1 to 254) of first ESTeem repeater.
r2 = Address (1 to 254) of second ESTeem repeater.
r3 = Address (1 to 254) of third ESTeem repeater.
Da = Address (1 to 255) of destination ESTeem.
Note: Address 255 is used for Global.
When transmitting packets through other ESTeems, the
source ESTeem will automatically adjust it's FRACK
time to allow additional time for the packet to reach its
destination and for the returned acknowledgment. Frack
time takes into account the packet size and the number of
repeaters specified. The ACK still comes from the
destination ESTeem, not the first or any repeater.
For testing purposes, you can loop back a connection to
yourself by placing your source address in the destination
address of the repeater string. Any data transmitted will
repeat through the repeater address and display back on
the screen.
Example:
CONN r1,Sa
r1 = Address (1 to 254) of first ESTeem repeater.
Sa = Address of local ESTeem.
Any ESTeem command in this manual that uses an
address string can be configured to use the Digi-
repeating feature.
Example:
SETC r1,r2,r3,da
GLOBAL BROADCAST
Global broadcast is the ability of one ESTeem to transmit
it's message to more than one ESTeem at one time. All
ESTeems within radio range will receive the message
whether or not they are connected to another ESTeem or
in command or converse mode.
You can put your ESTeem in Global by connecting or
programming the SETC to address 255. Address 255 is
a non assignable unit address and is used by the ESTeem
CPU to access this special mode. When an ESTeem is in
Global, the standard ACK protocol from the receiving
ESTeem is disabled, but the 32 bit CRC error checking
on the received ESTeem is still operational. When you
perform CONN 255 <Enter> from the COMMAND
MODE the ESTeem will immediately go to the
CONVERSE MODE (* is displayed). All messages sent
will be transmitted globally to all ESTeems in radio
range.
In the ESTeem you have a GLOBAL (on/off) command.
When GLOBAL = On, you can receive Global
transmissions. If GLOBAL = Off you will not display
Global transmissions from other ESTeems.
Note
:
Factory default is ON.
By using the repeater function you can transmit Global
messages from another ESTeem using the Digi-repeating
feature.