Figure 9: SSL/TLS handshake
The SSL/TLS protocol requires certificates for authentication and a trusted root certificate
catalog to verify the certificates. The calypso provides secure key storage option through
the encrypted file system (see section
). A trusted root certificate catalog is present on
board with a set of well known trusted root CAs (see appendix
8.4.3. Socket operations
In this section, the AT commands used to perform various operations on a socket is de-
scribed. A socket can be created using the command
AT+socket
and the socket descriptor
(socketID) returned by this command can be used to perform all the other socket operations.
Socket select command allows monitoring multiple sockets and triggering on specific events.
Calypso reference manual version 1.2
© April 2019
www.we-online.com/wireless-connectivity
49