Instructions

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Espressif Systems
ESP8266
AT Instruction Set
4.
AT+CIPSSLSIZE – Set the size of SSL buffer
Note
1.
ESP8266 can only set one SSL connection at most.
2.
SSL connection does not support UART-WiFi passthrough mode
(transparent transmission).
3.
SSL connection needs a lot of memory, otherwise, it may cause system
reboot. Users can try command "AT+CIPSSLSIZE=<size>" to enlarge the
buffer size.
AT+CIPSSLSIZE – Set the size of SSL buffer
Command
AT+CIPSSLSIZE=<size>
Response
OK
Parameters
<size> the size of SSL buffer, range: [2048, 4096]
Espressif Systems  / Friday, July 15, 201657 73