...Sites such as letsencrypt.org allow you to obtain free (no charge) certificates in an automated way using the ACME protocol.
This library allows you to get certificates for IoT devices based on the ESP32.
More info in https://sourceforge.net/p/esp32-acme-client/code/HEAD/tree/trunk/Readme.md.
Specific configuration examples and technology overview is in https://sourceforge.net/p/esp32-acme-client/code/HEAD/tree/trunk/components/acmeclient/Configurations.md.
You can get this component from Espressif's component registry ( https://components.espressif.com/components?...