USC520 / USC540 User Manual www.usconverters.com
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4.2.2. Enter AT Command Mode
①
Send +++ to USC520/USC540 through serial port
②
USC520/USC540 return ‘a’
③
Need reply “a” within 3s once received previous ‘a’
④
ok to enter AT command mode
4.2.3. AT Command details
1. AT+E
Function: Set/query echo setting
Format:
Query
AT+E <CR>
<CR><LF>+OK=<on/off><CR><LF>
Set
AT+E=<on/off><CR>
<CR><LF>+OK<CR><LF>
Parameter:
①
on: Open echo function, and input AT command (Echo on)
②
off: Close echo function. (Echo off)
2. AT+ENTM
Function: Enter transparent transmission mode (Exit command mode)
Format:
Set
AT+ENTM<CR>
<CR><LF>+OK<CR><LF>
Parameter: N/M
Change work mode from command mode to transparent transmission mode after run this
command correctly
3. AT+Z
Function: Re-start USC520/USC540
Format:
Set
AT+Z<CR>
<CR><LF>+OK<CR><LF>
Parameter: N/M
<Notice>: USC520/USC540 will re-start after run this command correctly.
