Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 143)

Serial Port Commands
Fixed DTE Rate +IPR
©Restricted Page: 137 / 184
This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without
prior written agreement.
WM_DEV_OAT_UGD_049 - 001 VOLUME 1 August 23, 2007
Command Responses
AT+IPR=38400 OK
Note: Disables autobauding and sets rate to 38400 bps
AT+IPR=0 OK
Note: Enables autobauding
8.2.6 Notes
• The serial autobauding feature is supported, and covers the following serial
speeds (only): 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200,
230400, 460800, 921600 bps. Beyond those serial speeds, correct operation of
the Wireless CPU ® is not guaranteed.
• Any AT command issued by the DTE must start with both capital ‘A’ and ‘T’
(or ‘/’) or both lower case ‘a’ and ‘t’ (or ‘/’), otherwise the DCE may return some
garbage characters and become desynchronized. Should this happen, the DTE
simply issues ‘AT\r’ (at 2400 or 4800 bauds) once or twice or just ‘AT’ (at 9600
bauds) to resynchronize the Wireless CPU ® .
• The DTE waits for 1ms after receiving the last character of the AT response
(which is always ‘\n’ or 0x0A) to send a new AT command at either the same
rate or a new rate. Should this delay be ignored, the DCE can become
desynchronized. Once again, sending ’AT\r’ once or twice or just ‘AT’ causes
the DCE to recover.
Caution:
When starting up, if autobauding is enabled and no AT command has yet been
received, the product sends all unsolicited responses (like RING) at 9600 bauds.