Appendix A
Hayes Commands
Man_805U Rev 1.8
Page
57
RB is radio baud Rate, (in
bits
per second)
TD is transmit delay (0.008)
MP is the maximum packet size to be transferred
NB is the maximum number of bit times delay allowed between characters in the protocol.
S19 is calculated as
S19 = 1000 * (NB/SB)
(Rounded up)
Response Codes
Response codes display the status of the module in response to user commands. The response
code displayed depends on the ATV setting, the ATX setting and the ATQ setting. ATV0
selects numeric response codes. ATV1 selects verbal response codes. The ATXn command
selects extended response codes. ATQ0 disables all response messages. ATQ1 enables
response messages. The following table describes the messages. A
•
symbol indicates that
messages is displayed for the corresponding ATX setting.
Numeric
Code
Verbal Message
ATX setting
Comments
X0
X1
X2
X3
0
OK
•
•
•
•
Valid Command Entered
1
CONNECT
•
Connection established.
CONNECT
baud
is displayed for
X1,X2,X3
2
RING
•
•
•
•
Module Received an incoming
connection request
3
NO CARRIER
•
•
•
•
Connection with remote module
lost, or not initiated.
4
ERROR
•
•
•
•
Invalid Hayes command entered.
7
BUSY
•
•
X0, X1 display NO CARRIER
instead of BUSY
13
RINGING
•
X0, X1, X2 Don’t display
RINGING message
15
CONNECT 19200
•
•
•
CONNECT is displayed for X0
17
CONNECT 38400
•
•
•
CONNECT is displayed for X0
19
CONNECT 76800
•
•
•
CONNECT is displayed for X0
