Trying to run stock WINC1500_SSL_CONNECT_EXAMPLE for with SAM21 explained and WINC1500 xplained.
I get a connect error code 12 and the WINC1500 debug console show a Missing X509Root error.
But root certs were loaded during firmware update ...
....
>>>Found Certificate:
>>> GlobalSign Root CA
>Writing the certificate to SPI flash...
Done
....
On WINC1500 debug console it shows:
(3770)>> TLS_RSA_WITH_AES_128_GCM_SHA256
(3780)(SSL_172.217.12.164)-> Certificate
(3790)(TLS)*=*=* X509 *=*=*
(3790)(TLS) Subject <www.google.com>
(3800)(TLS) Issuer <Google Internet Authority G3>
(3800)(TLS) <2018-03-07 19:53:57> to <2018-05-30 18:53:00>
(3810)(TLS)*=*=* X509 *=*=*
(3810)(TLS) Subject <Google Internet Authority G3>
(3820)(TLS) Issuer <GlobalSign>
(3820)(TLS) <2017-06-15 00:00:42> to <2021-12-15 00:00:42>
(3830)(M2M)(ERR)(HS_ParseCertificateMsg)(2061)Missing X509Root