Hello. I'm sorry for the sudden email.

I have a question about mbedtls. Currently, HTTPS communication is performed by mbedtls with a microcomputer called esp32-wroom-32d.

The following error occurs when validating the root certificate. --------------------------------------------- mbedtls: ssl_tls.c: 5808 x509_verify_cert () returned -12288 (-0x3000) --------------------------------------------- I can't find out the details even if I check the error code.

Changing the certificate will eliminate the error. It has been confirmed that the certificate is legitimate and can be used. [SecurityCommunicationRootCA1.pem] ---- Success [SecurityCommunicationRootCA2.pem] ---- Failure

I would like to have any information.

Sorry for the unfamiliar English.

I look forward to working with you.

Komaki