Chengdu Ebyte Electronic Technology Co.,Ltd
E840-DTU(4G-02E) User Manual
Copyright ©2012–2019
,
Chengdu Ebyte Electronic Technology Co.,Ltd
23
Format
:
configure
transmit AT+EXAT<CR><LF>
return <CR><LF>+OK<CR><LF>
Parameter
:
None
Description: After the command is executed correctly, the module is switched from command mode to the transparent
transmission mode.
AT+RESTORE
Function
:
restore factory configuration
Format
:
configure
transmit AT+RESTORE<CR><LF>
return <CR><LF>+OK<CR><LF>
Parameter
:
None
Description
:
None
AT+UART
Function
:
set/inquire UART parameters
Format
:
inquire
transmit
:
AT+UART<CR>
return
:
<CR><LF>+OK=<baudrate>,< parity ><CR><LF>
configure
transmit
:
AT+UART=<baudrate>,< parity ><CR><LF>
return
:
<CR><LF>+OK<CR><LF>
Parameter
:
baudrate
baud rate 1200~921600bps
,
self-defined
Parity
Parity
NON E None
EVEN
ODD
description
:
none
AT+UARTCLR
Function
:
Set/inquire whether to clear the serial port cache before connecting the module.
Format
:
Inquire
transmit
:
AT+ UARTCLR <CR>
return
:
<CR><LF>+OK=< sta ><CR><LF>
configure
transmit
:
AT+ UARTCLR =< sta ><CR>
return
:
<CR><LF>+OK<CR><LF>
Parameter
:
sta status
ON Clear the serial port cache before connecting.
OFF Do not clear the serial port cache before connecting.
AT+IMEI
Function
:
inquire the IMEI of module
Format
:
inquire
transmit
:
AT+IMEI<CR>
return
:
<CR><LF>+OK=<imei><CR><LF>
parameter
:
imei
IMEI of module
AT+LINKSTA
Function
:
inquire whether TCP connection is established
Format
:
inquire
transmit
:
AT+LINKSTA<CR>
return
:
<CR><LF>+OK=<sta><CR><LF>
Parameter
:
Sta
whether establish TCP connection
,
Connect(TCP connection)/ Disconnect(TCP cut off)
AT+LINKSTA1
Function
:
inquire TCP whether TCP connection is established
Format
:
inquire
transmit
:
AT+LINKSTA1<CR>
return
:
<CR><LF>+OK=<sta><CR><LF>
Parameter
:
Sta
whether establish TCP connection
,
Connect(TCP connection)/ Disconnect(TCP cut off)