Chengdu Ebyte Electronic Technology Co.,Ltd
E840-TTL-4G02E User Manual
Copyright ©2012–2019,
Chengdu Ebyte Electronic Technology Co.,Ltd
25
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
Format
:
configure
transmit AT+CPIN<CR><LF>
return <CR><LF>+OK=<cpin><CR><LF>
Parameter
:
cpin
1
Able to detect SIM card
0
unable to detect SIM card
Description
:
None
AT+ POTOCOL
Function
:
Set/inquire Whether to enable protocol transmission (valid under 4G multi socket)
Format
:
inquire
transmit
:
AT+ POTOCOL <CR>
return
:
<CR><LF>+OK=<sta><CR><LF>
configure
transmit
:
AT+ POTOCOL =<data><CR>
return
:
<CR><LF>+OK<CR><LF>
Parameters: data status
ON
Turns on the transmission of the EBYTE protocol
OFF
Turns off the he transmission of the EBYTE protocol
AT+ UARTEX
(
extending command
)
Function
:
Set/inquire serial port parameter
(
AT+UART is for configuring baud rate and parity only
)
Format
:
inquire
transmit
:
AT+ UARTEX <CR>
return
:
<CR><LF>+OK=<sta><CR><LF>
configure
transmit
:
AT+ UARTEX =<baud>,<data bit>,< parity>,<stop><CR>
return
:
<CR><LF>+OK<CR><LF>
Parameter
:
baud: UART baud can be configured as levels below
:
9600,
19200,
38400,
57600,