Adeunis RF ARF868 ULR Mode D'emploi page 44

ARF868 Radio Modems - User guide version V1.6
This function enables a communication to be put into operation quickly in the field to check the range limit between two modems with the
defined choices of frequency, data rate, power, etc.
The ATT00 and ATT01 commands enable communication to be established between two modems with a minimum of material constraints.
Sending ATT01 to the receiving modem activates reception and continuous monitoring of the frame transmitted (*). The LED indicator lamp on
the front panel of the modem indicates reception by a short flash for each frame received (every second):
• Green if the frame is OK
• Red if the frame is corrupted
Sending ATT00 onto the transmitting modem activates the sending of a predefined 64 octet frame every second, continuously (*).
(*): Caution, in these modes the modem is no longer capable of interpreting AT commands. For this it is necessary to exit the ATT00 or ATT01
test modes by sending the ESC character (value 0x1B). The modem then returns: "O" <cr><lf> if the request is correctly interpreted and repo-
sitions itself on listening for an AT command.
5. Product Configuration - Command Mode
The command mode is an embedded tool, accessible by the serial link via a terminal (*), enabling the programming of the modem parameters
using a set of instructions called: "AT command set". AT commands are used to read and write the modem configuration registers (see § 5.3
Description of registers)
In the command mode, the radio is deactivated (in reception and transmission), except for the radio test commands (commands ATT00 &
ATT01).
(*): Hercules types
5.1. Command mode input/output
Entry into the command mode is obtained by transmission of a sequence of 3 ASCII characters on the serial link.
By default, the sequence is: « +++ », however the user can choose his own ASCII character by reprogramming on register S214 (see § 5.3
Description of registers).
Another possibility for entering the command mode is to activate the BP1/BP2 sequence on the back of the modem and as described in §1.8
Service interface. This procedure can be used if the command mode entry code has been changed or lost.
The ATO command enables us to quit the command mode and return to the communication mode.
It should be noted that exiting from the command mode is also possible automatically (timeout) by programming register S202 (see
§ 5.3 Description of registers).
Command Description
+++ Allows entry into command mode
ATO Exit command mode
5.2. AT Commandes
A command starts with the two ASCII characters: "AT", followed by one or more characters and data (see C below for the syntax of AT com-
mands available on the modem).
Each command should end with a "CR" or "CR" "LF", the two possibilities are accepted. (CR signifies: Carriage Return, LF signifies: Line Feed)
On receipt of a command the modem returns:
• "the data"<cr><lf>, for a reading command, type ATS<n> ? , AT/S or AT/V.
• "O" <cr><lf>, for all other types of commands if it is accepted.
• "E" <cr><lf>, if it refuses the command because of a syntax error, unknown command, unknown register, invalid parameter, etc.
• "W"<cr><lf>, if it refuses the command because the configuration requested is not authorised.
• "CM" <cr><lf>, if it accepts entry into the command mode
Answer
« CM » to confirm entry in command mode.
«O»<cr> if operation OK
«E»<cr> if error
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