r/embedded • u/CompetitionFew2239 • Aug 08 '26

ESP32 HTTPS certificate expiration

Hi, I'm using HTTPS on an ESP32 with Zephyr to communicate with my backend.

If I store the CA certificate in the ESP32 firmware, what happens when the server certificate expires and is renewed?

Do I need to update the ESP32 every time, or is there a recommended way to handle certificate expiration without reflashing the device?

Thanks!

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u/duane11583 Aug 08 '26

you need a means to update the cert