CAI JINYONG
2018-3-30
CHONGHAN CH-M4 WIRELESS MODEM USER MANUAL
页
11
Note: the Chonghan Wireless Modem port properties factory default is
115200/8/n/1/0, as above picture.
4.
Commonest Command
AT<CR>
// return OK
AT&F<CR>
// restore Modem parameters to factory
DEFAULT
ATZ <CR>
// loads user profile
AT&W<CR>
// save parameters
AT+CSQ<CR>
// signal query
AT+CXXCID<CR>
// display card ID
AT+CREG?<CR>
// verify the network registration status
AT+IPR? <CR>
// query device baud rate
AT+IPR=115200<CR>
// baud rate setting, support
115200/57600/38400/19200/9600/4800/2400/1200
ATD13612345678;<CR>
// voice call
ATD13612345678<CR>
// data call
ATA<CR>
// incoming call answer
+++
// switch data mode to command mode
ATO<CR>
// switch command mode back to data mode
ATH<CR>
// hang up
