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RFI-148 & RFI-900 High Output Power Paging Transmitters User Manual Page 20 of 134
A response is generated for each AT command issued. Responses to AT commands are shown in Table 3.
Response
Code
Response
Number
Description
OK
0
Returned whenever a command is entered that is executed correctly.
ERROR
4
Returned whenever a command is invalid or could not be executed.
BUSY
7
Returned when an attempt is made to enable the menu via AT? but the menu
system is already enabled on the other serial port.
Table 3: AT command response codes
3.5.1 List Slicing Syntax
Multiple indexes of an indexer can be queried in a single AT command using the list slicing syntax. AT
command sets cannot be used with the list slicing syntax. The list slice syntax uses the colon ‘:’ operator to
indicate a range of indexes to retrieve. Each value retrieved is printed on a new line.
For example, the AT command for retrieving a single sensor value is I90[n] where n is the index of the sensor.
To retrieve the first four sensor values (PA, Driver, PA Ambient, and Isolator temperatures) the following
syntax can be used:
Figure 8: List slicing syntax on the current sensor value
Running the list slice operator ‘:’ without specifying the range will return the length of the indexer:
Figure 9: List slicing syntax for the length of an indexer
3.5.2 Sequenced AT Commands
A series of get AT commands can be concatenated into a single AT command, known as a sequenced AT
command. AT command sets cannot be sequenced. A sequenced AT command begins with the attention code,
AT, followed by a number of commands, followed by the terminator.
For example, the AT commands for the serial number, current channel, and main serial port baud rate are I6,
S54 and S100[0], respectively. These commands can be run separately:
ATI90[0:3]
45
42
39
30
OK
ATI90[:]
27
OK