ESP8266 SSL User Manual

2022-12-08
●Preambles
■This manual introduces how to implement SSL encryption based on ESP8266_NONOS_SDK when ESP8266 runs as either SSL server or SSL client.
■SSL function usually requires a lot of RAM memory, therefore, users need to make sure that there is enough space before running the application. If the space occupied by SSL buffer is 8KB defined by espconn_secure_set_size, then at least 22KB memory size is required if SSL function is to be implemented. The specific memory size required varies with the actual size of data sending from SSL server.
■If the SSL bi-directional verification is enabled, the SSL buffer size allowed to set by espconn_secure_set_size is 3072 bytes at most. The specific size allowed to set depends on the actual size of heap available.
■Demo and scripts on how to generate SSL certificate: test_cert_and_creat_information and TLS_BiDirectVerif_Demo.

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April 22, 2016

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