Telegesis TG-ETRXn-UG-01-104, User Manual

Page: 17 / 37

Telegesis (UK) Limited
TG-ETRXn-UG-01-103 17
User Guide 1.04
ETRX1 and ETRX2
©2008 Telegesis (UK) Ltd
ETRXn User Guide (Rev 1.04)
At node 000D6F00000C53AF At node 000D6F00000A7DBC
AT+OPCHAN:000D6F00000A7DBC
OK
CHAN:000D6F00000C53AF
OPEN OPEN
asdad
asdad
123123
123123
+++
CLOSED CLOSED
Figure 12. Channel messages
5 S-Registers
5.1 Overview
The ETRX1 and ETRX2 contain a number of items of configuration data (the “S-registers”) which
are under the control of the user. Commands “ATS” and “ATSREM” read and write the register
contents locally as well as remotely. They define, for example, the radio network parameters, I/O
status, textual prompts and responses and timer operations. The timed functions are the key to
much of the versatility of the ETRXn and detailed study of the AT command dictionary document is
recommended.
For a reference of all S-Registers please refer to the AT command dictionary document. Most of
the registers are non-volatile, retaining their values when the module is powered down. Note that
some register changes take effect immediately while others are deferred
– typically until a reset.
The registers fall into groups, shown below:
5.2 Radio Setup (S00-S03)
S00
The channel mask (i.e. the set of permissible radio channels). By default all 16 channels are
usable. By setting just a single bit of S00, the module is forced to operate on a specific channel.
S01
When establishing a PAN the coordinator will pick a random PAN ID if S01 is set to FFFF. If it is
set to any value between 0000 and 3FFF this number will be used as PAN ID instead, unless trying
to establish a PAN which already exists on the same channel. In this case a random PAN ID will
be used instead. When trying to join any PAN with S01 set to a number other than FFFF, only the
PAN with the ID listed in S01will be joined.
S02
S02 represents the transmit power level ranging from
–1dBm to –32dBm on the ETRX1, from
4dBm to
–43dBm on the ETRX2, and from 17dBm to -22dBm on the ETRX2PA. Changes take
effect when joining or establishing a PAN, unless F 15 of S08 is set. In this case changes take
effect instantly. Actual values for the ETRX2 are {3, 2, 1, -1, -2, -3, -4, -5, -6, -7, -8, -9, -11, -12,