SAM3Gplus User Guide V2.5
15
Ver2.5
8.2 Using The Serial RS232 Port
The RS232 default configuration is:
-
Terminal speed : 115200bps (+IPR=115200)
-
Data format : 8 data bits 1 stop bit (+ICF=3,3)
-
Hardware RTS, CTS flow control (+IFC=2,2)
-
No auto-answer (S0=0)
There are 6 serial data signals available at the RJ45 connector, namely DCD, DTR, RXD, TXD, RTS and
CTS. There is an option for RI (Ring Indicator) signal instead of DTR signal.
This configuration allows any external controller to communicate with the SAM3Gplus at 115200bps over the
serial port. The external device can set up the SAM3Gplus modem using AT commands, can transfer Circuit-
switched data or Packet-switched data.
With packet-switched data, the external device must be capable of communicating using PPP, TCP/IP or
UDP/IP.
Setup Example: Serial port connection to a PC
8.2.1 AT Commands:
The SAM3Gplus modem supports
most
of the AT commands specified in the following standards:
-
3GPP TS 27.005 : Control SMS functions for devices on GSM/WCDMA networks
-
3GPP TS27.007 : Control devices operating on GSM/WCDMA networks
-
ITU-T V.250 : Control serial communications over an asynchronous interface
For details of the AT commands, refer to the “
Supported AT Command
” and “
Extended AT Commands
”
manuals.
