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Table Of Contents
SARA-R4 series-AT commands manual
UBX-17003787 - R16
17File System
Page 201 of 401
Differently from +URDFILE command, this command allows the user to read only a portion of the file,
indicating the offset and amount of bytes.
17.5.2Syntax
Type Syntax Response Example
Set AT+URDBLOCK=<filename>,
<offset>,<size>[,<tag>]
+URDBLOCK: <filename>,<size>,
<data>
OK
AT+URDBLOCK="filename",0,20
+URDBLOCK: "filename",20,"these
bytes are the "
OK
17.5.3Defined values
Parameter Type Description
<filename> String File name. For file system file name and data size limits see File system limits.
<offset> Number Offset in bytes from the beginning of the file.
<size> Number Number of bytes to be read starting from the <offset>.
<data> String Content of the file read.
<tag> String The optional parameter <tag> specifies a different application file type. FILE TAGS
table lists the allowed <tag> strings.
17.5.4Notes
• The returned file data is displayed as an ASCII string of <length> characters in the range [0x00,0xFF]. At
the end of the string, <CR><LF> are provided for user convenience and visualization purposes.
• In case a size larger than the whole file size is required the command returns the file size only, indicating
the amount of bytes read.
• In case an offset larger than the whole file size is required, the "+CME ERROR: FFS file range" error result
code is triggered.
SARA-R4 / SARA-N4
• The <tag> parameter is not supported.
17.6Delete file +UDELFILE
+UDELFILE
Modules All products
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
partial No No No - +CME Error
17.6.1Description
Deletes a stored file from the file system.
If <filename> file is not stored in the file system the following error result code will be provided: "+CME
ERROR: FILE NOT FOUND".
17.6.2Syntax
Type Syntax Response Example
Set AT+UDELFILE=<filename>[,<tag>] OK AT+UDELFILE="filename","USER"
OK
17.6.3Defined values
Parameter Type Description
<filename> String File name. For file system file name and data size limits see File system limits.
<tag> String The optional parameter <tag> specifies a different application file type. FILE TAGS
table lists the allowed <tag> strings.