Ebyte E-840-TTL-4G02 User Manual page 23

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Parameter：
ON
OFF
AT+IMEI
Function： inquire the IMEI of module
Format： inquire
parameter：
AT+LINKSTA
Function： inquire whether TCP connection is established
Format： inquire
Parameter：
AT+LINKSTA1
Function： inquire TCP whether TCP connection is established
Format： inquire
Parameter：
AT+LINKSTA2
Function： inquire whether TCP connection is established
Format： inquire
Parameter：
AT+LINKSTA3
Function： inquire whether TCP connection is established
Format： inquire
Parameter：
AT+SOCK
Function：
Format： inquire
configure
Parameter： protocol
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sta status
Clear the serial port cache before connecting.
Do not clear the serial port cache before connecting.
transmit：AT+IMEI<CR>
return：<CR><LF>+OK=<imei><CR><LF>
imei IMEI of module
transmit：AT+LINKSTA<CR>
return：<CR><LF>+OK=<sta><CR><LF>
Sta whether establish TCP connection，Connect(TCP connection)/ Disconnect(TCP cut off)
transmit：AT+LINKSTA1<CR>
return：<CR><LF>+OK=<sta><CR><LF>
Sta whether establish TCP connection，Connect(TCP connection)/ Disconnect(TCP cut off)
transmit：AT+LINKSTA2<CR>
return：<CR><LF>+OK=<sta><CR><LF>
Sta whether establish TCP connection，Connect(TCP connection)/ Disconnect(TCP cut off)
transmit：AT+LINKSTA3<CR>
return：<CR><LF>+OK=<sta><CR><LF>
Sta whether establish TCP connection，Connect(TCP connection)/ Disconnect(TCP cut off)
Set/query the network protocol parameter format.
transmit：AT+SOCK<CR>
return：<CR><LF>+OK=<protocol>,<ip>,< port ><CR><LF>
transmit：AT+SOCK=<protocol>,<ip>,< port ><CR>
return：<CR><LF>+OK<CR><LF>
protocol type， TCPC / UDPC
TCPC corresponding TCP client
E840-TTL(4G-02)User Manual
22