Ebyte E840-DTU User Manual page 27

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parameter：
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：
Format：
transmit AT+CSQ<CR><LF>
return <CR><LF>+OK=<csq><CR><LF>
parameter：
description：none
AT+CREG
Function：
Format：
transmit AT+CREG<CR><LF>
return <CR><LF>+OK=<creg><CR><LF>
Parameter：
Description：
AT+CPIN
Function：
Format：
transmit AT+CPIN<CR><LF>
return <CR><LF>+OK=<cpin><CR><LF>
Parameter：
Description：
AT+ POTOCOL
Function：
Format：
configure
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：
format：
configure
parameter： baud: UART baud can be configured as levels below：
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ctrl EBYTE IoT function switch，0 off/1 on
inquire signal strength
configure
csq signal strength
inquire whether it is registered with the carrier.
configure
creg
1 Register to the network
0 not registered to the network1
None
inquire SIM card status
configure
cpin
1 Able to detect SIM card
0 unable to detect SIM card
None
Set/inquire Whether to enable protocol transmission (valid under 4G multi socket)
inquire
transmit：AT+ POTOCOL <CR>
return：<CR><LF>+OK=<sta><CR><LF>
transmit：AT+ POTOCOL =<data><CR>
return：<CR><LF>+OK<CR><LF>
Set/inquire serial port parameter（AT+UART is for configuring baud rate and parity only）
inquire
transmit：AT+ UARTEX <CR>
return：<CR><LF>+OK=<sta><CR><LF>
transmit：AT+ UARTEX =<baud>,<data bit>,< parity>,<stop><CR>
return：<CR><LF>+OK<CR><LF>
9600,
19200,
38400,
57600,
115200,
230400,
460800,
921600,
data bit：UART data bit
8，length is 8 bits
7，length is 7 bits
E840-DTU(4G-02E) User Manual
27