Chapter 4. Software framework
Does ESP32 support PCI-E protocol?
No, it doesn’t.
4.5 Protocols
4.5.1 ESP-TLS
When testing RTOS SDK mqtt/ssl_mutual_auth with ESP8266, the server connection failed. Why?
• The failure of SSL connection may due to insucient memory of ESP8266.
• Please use the master version of ESP8266-RTOS-SDK to test this example, since it supports dynamic memory
allocation in menucong so as to reduce the usage of memory peak. The specic action is: menucong ->
Component config -> mbedTLS -> (type “Y”to enable) Using dynamic TX /RX buffer ->
(type“Y”to enable) Free SSL peer certificate after its usage -> (type“Y”to enable)
Free certificate, key and DHM data after its usage.
Can ESP HTTPS skip the server certicate check?
• Yes, if you enable the following options in menucong.
– Menu path: (Top) -> Component config -> ESP-TLS -> Allow potentially in-
secure options
– Menu path: (Top) -> Component config -> ESP-TLS -> Allow potentially in-
secure options -> Skip server certificate verification by default
• Besides, make sure that the cert_pem member variable is not set in the esp_http_client_config_t
structure. Otherwise, the server certicate will still be veried with this CA certicate.
• If you want to test HTTP OTA at the same time, you need to enable the Menu path: (Top) -> Compo-
nent config -> ESP HTTPS OTA -> Allow HTTP for OTA option in menucong.
How to set the esp_tls_conn_read API in ESP-TLS to non-blocking mode? Or is there any other way
to implement non-blocking?
• You can set non_block to true in the esp_tls_cfg_t structure in esp_tls.h to achieve non-blocking.
• Alternatively, you can call esp_transport_connect_async to achieve non-blocking.
What are the TLS versions supported by ESP-IDF?
• The recommended TLS protocol in ESP-IDF is the Mbed TLS protocol.
• ESP-IDF v5.0 and later no longer support SSL 3.0, TLS 1.0 and TLS 1.1, but only support TLS 1.2 and TLS
1.3.
Espressif Systems 90
Submit Document Feedback
Release master
To Next Page
Loading...
Need help?
General