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Ebyte E840-DTU
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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>
ParameterNone
Description
None
AT+UART
Function
set/inquire UART parameters
Format inquire
transmitAT+UART<CR>
return
<CR><LF>+OK=<baudrate>,< parity ><CR><LF>
configure
transmitAT+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
descriptionnone
AT+UARTCLR
Function Set/inquire whether to clear the serial port cache before connecting the module.
Format Inquire
transmitAT+ 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
transmitAT+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
transmitAT+LINKSTA1<CR>
return<CR><LF>+OK=<sta><CR><LF>
Parameter Sta whether establish TCP connectionConnect(TCP connection)/ Disconnect(TCP cut off)

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