Request
Response
AT+sendTo=[socketID],[family],[remotePort],
[remoteAddress], [format], [length], [data]
OK or error
Arguments:
socketID : socket descriptor
family : INET or INET6
remotePort : Port of the peer to connect to
remoteAddress : Address to connect to
format : data format 0=binary, 1=base64 (binary to
text encoding)
length : number of bytes to send (max 1460)
data: date to send
Table 52: AT+sendTo
8.5. File system commands
Calypso creates and maintains an ecrypted file system on the serial flash present on-board.
The file system provides secure storage for files like certificates, private keys and web pages.
Here are some of the features of the file system.
The storage capacity for additional content in the radio module’s file system is limited to the
available capacity in the file system itself.
• The file system can only be accessed through AT commands.
• File system on one module cannot be read by another - this prevents cloning of sFlash.
• Built in tamper detection detects corrupt files and warns the user of unauthenticated
file access.
• Each file has a minimum size of 4096 bytes (Fail-safe = 8192 bytes).
• Maximum number of files is 240 of which 100 is reserved for system files.
• File name can be a maximum 180 bytes.
• Files can created with one or more of the following flags: fail-safe, secure, public read,
public write.
• Files cannot be enlarged once created hence the maximum size attribute has to be set
appropriately during file creation.
File system does not handle fragmentation
Calypso reference manual version 1.2
© April 2019
www.we-online.com/wireless-connectivity
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