MHX-920 Operating Manual: Appendix A Modem Command Summary 45
A. Modem Command Summary
The following provides a command summary for the MHX-920 module. Factory settings are denoted with a ‘*’.
AT Commands
A Answer
E Command Echo
E0 No Echo
* E1 Command Echo
I Identification
I0 Custom
I1 Product Code
I2 ROM Checksum test
I3 Firmware Version
I4 Firmware Date
I5 Copyright
I6 Firmware Time
I7 Serial Number
O On-line Mode
Q Quiet Mode
* Q0 Enables Result Codes
Q1 Disables Result Codes
V Result Codes Display
V0 Display as Numbers
* V1 Display as Words
W Connection Result
* W0 Reports DTE as CONNECT xxxx
W1 DTE) rate as CARRIER xxxx.
W2 Reports DCE as CONNECT xxxx
Z Reset and load stored configuration
&C DCD (Data Carrier Detect)
&C0 DCD is always on
* &C1 DCD is on when modems are synchronized
&C2 DCD used for output data framing
&D DTR (Data Terminal Ready)
&D0 DTR ignored
* &D2 DTR disconnects and switches to command
&D3 DTR disconnects and resets modem
&F Load Factory Default
&F1 Master
&F2 Slave
&F3 Repeater
&F4 Slave through Repeater
&K Handshaking
&K0 Disable Handshaking
&K2 RTS/CTS Input Framing
* &K3 Enable Handshaking
&S DSR (Data Set Ready)
&S0 DSR is always on
* &S1 DSR on in data, off in command mode
&S2 DSR/DTR signaling
&V View Configuration
&W Write configuration to memory
Sxx? Read S register value
Sxx=yy Set S register value
Result Codes
0 OK 12 CONNECT 9600
3 NO CARRIER 13 CONNECT 14400
4 ERROR 14 CONNECT 19200
7 CONNECT 2400 15 CONNECT 28800
8 CONNECT 3600 17 CONNECT 38400
9 CONNECT 4800 18 CONNECT 57600
10 CONNECT 7200 33 CONNECT 115200
64 CARRIER 20000 62 CARRIER 45000
S Registers
S0 Auto Answer
0 = power up in Command Mode,
*1 = power up in Data Mode
S2 Escape code [0...255] default ‘+’ (43)
S3 CR character [0...255] default <cr> (13)
S4 Line Feed [0...255] default <lf> (10)
S5 Backspace [0...255] default <bs> (8)
S101 Operating Mode
1 - Master Point to Multipoint
2 - Master Point to Point
3 - Slave
4 - Repeater
5 - Master Diagnostics
S102 Serial Baud Rate
1 = 115200, 2 = 57600, 3 = 38400
4 = 28800, 5 = 19200, 6 = 14400
*7 = 9600, 8 = 7200, 9 = 4800,
10 = 3600, 11 = 2400
S103 Wireless Link Rate
*2 = Fast w/o FEC
4 = Fast with FEC
S104 Network Address [0...65535]
S105 Unit Address [1...65535]
S106 Primary Hopping Pattern [0...63]
S206 Secondary Hopping Pattern [0...63]
S107 Encryption Key [0...65535]
S108 Output Power Level
0 = 1 mW, 1 = 10 mW, *2 = 100 mW, 3 = 1000 mW
S109 Hopping Interval
1 = 8 msec, 2 = 12 msec, 3 = 16 msec,
*4 = 20 msec, 5 = 30 msec, 6 = 45 msec,
7 = 80 msec, 8 = 120 msec
S110 Data Format
* 1 = 8N1, 2 = 8N2, 3 = 8E1, 4 = 8O1
5 = 7N1, 6 = 7N2, 7 = 7E1, 8 = 7O1
9 = 7E2, 10 = 7O2, 11 = 9N1
S111 Packet Minimum Size [1...Maximum Size]
S112 Packet Maximum Size [2...255]
S113 Packet Retransmissions [0...255]
S213 Packet Retry Limit [0...255]
S114 Packet Size Control
*0=Disabled, 1=Enabled
S115 Packet Repeat Interval [1..255]
Default = 1
S116 Packet Character Timeout [0...254 ms]
S117 Modbus Mode
*0 = Disabled, 1 = Enabled
S118 Roaming
*0 = Disabled, 1 = Enabled
S119 Quick Enter to Command
0 = Disabled, *1 = Enabled
S120 RTS/DCD Framing Interval [0...254 ms]
S121 DCD Timeout [0...254 ms]
S122 Remote Control
*0 = Disabled, 1 = Enabled
S123 RSSI (dBm)
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