ESP8266 Community Forum

A following question: If ESP8266 as SSL client is expected to switch the connections between two SSL server, then HOW?

You go through the same process for each one - set the CA location, set the SSL buffer size, and connect.

The only thing is that you don't have enough memory to hold them both open at the same time - for the most part this is not really a problem because you're often connecting to web sites and so you can do this one at a time.

As an example, I use Google Maps API via web calls, and I use IBMCloud as my MQTT platform. I have two CA certificate sets loaded in different areas of flash and have also found that Google needs a larger SSL buffer than IBM's MQTT, so for both I do:



before connecting.

IIRC setting up only one SSL (TLS) connection already consumes huge piles of memory, amounts I will never have available. So I guess having two of them is really out of the question

For my information, what amount are we really talking about in practice?

The CA location and SSL buffer are not connection specific, which is why you have to operate only one connection at a time. If your connections shared the same CA then you could possibly open more than one but I think you'll be in trouble with the common SSL buffer.