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File system API frames Local File System Request - 0x3B
Digi XBee® 3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide 292
Request
Offset Size
Frame
Field
Description
5 8-bit
File System
Command
File Read - 0x03
6 16-bit
File Handle Value returned from File Open - 0x01 response.
8 32-bit
Read
Offset File position for read, or 0xFFFFFFFF to use the current position.
12 16-bit
Bytes To
Read Number of bytes to read from file, or 0xFFFF to read as many as
possible (limited by file size or maximum response frame size).
Success Response
Offset Size Frame Field Description
5 8-bit File System Command File Read - 0x03
6 8-bit Status
Success - 0x00
7 16-bit File Handle
Value sent in request.
9 32-bit Data Offset
Actual offset of data read from file.
13-n variable Data Data read from the file.
File Write - 0x04
Description
Write to the file.
Request
Offset Size Frame Field Description
5 8-bit
File System
Command
File Write - 0x04
6 16-bit
File Handle Value returned from File Open - 0x01 response.
8 32-bit
Write Offset
File position for write, or 0xFFFFFFFF to use the current
position.
12-n variable
Data Data to write to file. If empty, frame just refreshes the File
Handle timeout to keep the file open.