User manual

805U Radio Modem Module User Manual
Page 56 © April 2011
set less than the timeout set by the AT\T
command. Default 0.
S7 1-255 Number of Connection
attempts
How many times to attempt a connection
after an ATD command. Default 5.
S8 0-255 Test Timer Units Seconds – How long to run tests
(AT&Tx). Default 0 (no time-out).
S9 0-255 Module Receive Level Units (-)dBm - RSSI indication of last
received message
S10 0-255 DTR Loss Detection Time Units 10 milliseconds
S11 0-255 Not used
S12 read-
only
Command Mode Diagnostic Reason module last returned to command
mode, i.e. connection lost.
S12 = 0 Reset (ATZ or Power Up).
S12 = 1 Escape sequence (“+++”)
S12 = 2 DTR lowered.
S12 = 3 No ACK from remote module after connected.
S12 = 4 Activity timer timed out.
S12 = 5 No response to dial request to remote module.
S12 = 6 “BUSY” response from remote module on dial request.
S12 = 7 Character received from host while attempting to connect
S12 = 8 Hang-up from remote module.
S13 0-3 Country code for radio (not
user configurable)
0 = US/Canada 1 = Australia
2 = New Zealand 3 = Europe
S14 0-255 Max Data Packet size
transmitted by radio
Max Packet size = 20 + (S14 x 2). Default
255 = 530 bytes
S15 0-7 Not Used
S16 0-255 Transmit Hold-off Time In msec (default = 0)
S17 0-255 Receive Hold-off Time In msec (default = 0)
S18 0-255 Input buffer delay Radio will not transmit until the number of
characters in the input buffer = 2 x S18
value - see below
S19 0-255 Input buffer delay override Override time in msec to override S18 delay
- see below.
S20 0-255 Default system address
S18 is calculated as S18 = (MP – (SR * (10*MP/RB + TD)) / 2 (Rounded up)
SB is serial baud Rate, (in bits per second)
SR is serial data Rate, (in bytes per second – usually 1/10
th
of SB)