Chengdu Ebyte Electronic Technology Co. Ltd E840-DTU(4G-02)User Manual
Copyright
©
2012
–
2019,Chengdu Ebyte Electronic Technology Co. LTD.
25
Format
:
inquire
transmit
:
AT+ HEARTM <CR>
return
:
<CR><LF>+OK=<time><CR><LF>
configure
transmit
:
AT+ HEARTM =<time><CR>
return
:
<CR><LF>+OK<CR><LF>
Parameters: time heartbeat time, 0 off, range 1 to 65535 seconds.
AT+SHORTM
Function
:
set/inquire short connection time
Format
:
inquire
transmit
:
AT+ SHORTM<CR>
return
:
<CR><LF>+OK=<time><CR><LF>
configure
transmit
:
AT+ SHORTM=<time><CR>
return
:
<CR><LF>+OK<CR><LF>
parameter
:
time short connection time
,
0 off
,
from 2-255 second
AT+EBTIOT
Function
:
set /inquire EBYTE IoT Cloud platform
Format
:
inquire
transmit
:
AT+EBTIOT <CR>
return
:
<CR><LF>+OK=<ctrl><CR><LF>
configure
transmit
:
AT+EBTIOT =<ctrl><CR>
return
:
<CR><LF>+OK<CR><LF>
parameter
:
ctrl EBYTE IoT function switch
,
0 off/1 on
Note: After the IoT cloud function is enabled, the module is automatically connected to the Yiyi special IoT platform,
ignoring the sock configuration, registration package, and heartbeat package function.
AT+CSQ
Function
:
inquire signal strength
Format
:
configure
transmit AT+CSQ<CR><LF>
return <CR><LF>+OK=<csq><CR><LF>
parameter
:
csq signal strength
description
:
none
AT+CREG
Function
:
inquire whether it is registered with the carrier.
Format
:
configure
transmit AT+CREG<CR><LF>
return <CR><LF>+OK=<creg><CR><LF>
Parameter
:
creg
1
Register to the network
0
not registered to the network1
Description
:
None
AT+CPIN
Function
:
inquire SIM card status