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Raveon Technologies Corp.
is more than 2V, the modem is in active run state. When DZTR is less than 0.6V, the
unit will go into a deep sleep mode.
5. User Serial Port Commands
5.1. Overview
The serial portion the RF modem is used to send and receive data over the air, as well
as to configure the RF modem. In normal operation, the user sends data into the TXD
pin of the IO connector, and this data is transmitted over the air. Received data from
another RF modem is output to the user via the RXD pin of the IO connector. This is
the default operating condition of the RF modem. No special characters, hardware
control lines, or timing is required to operate the
MS
modem.
There is also a “Command Mode” used to program and configure the
M6
. In the
Command Mode, the
MS
modem accepts commands via the serial port TxD pin. The
commands can be used to change certain internal parameters of the
M6
modem as
well as to read-out the current configuration and diagnostic statistics.
5.2. Command Mode
The
M6
modem may be put into a “Command Mode”, by entering a sequence of three
plus characters (+++). To keep the
M6
modem from unintentionally entering the
Command Mode because of the +++ pattern occurring in a stream of data entering the
modem, there must be a pause in the data stream before the +++ as well as a pause
after the +++ is sent. If either pause is missing, the modem will not enter the
command mode.
Using serial communications software such as
HypterTerminal
, send the 3-character
command sequence “+++” while observing times of silence before [BT (Silence Before
Sequence) Command] and after [AT (Silence After Sequence) Command] the
command characters. The default BT and AT times are 500mS.
The default sequence for entering into AT Command Mode:
1. No characters sent for ½ a second.
2. Input three (3) plus characters (“+++”) within ½ of a second.
3. No characters sent for ½ a second.
When the
M6
modem first enters the Command Mode, it sends the
phrase “Raveon”
followed by the model number
Raveon M6S
(transceiver version)
out of its
serial port, and then an “OK” sequence. The “OK” sequence is a sequence of
4 characters:
An “
O
”, “
K
”, <
CR
>, and <
LF
> characters
(
<CR>
= ASCII 0D,
<LF>
= ASCII 0A)
5.3. Setting a Parameter
To set a parameter in the
M6
modem, enter the Command Mode as described above.
Then enter the proper AT command, a space, the parameter, and then a carriage
