Thanks.
I've downloaded OpenSSL so can now grab certificates that way.
The basic test code now works and this is the output:
[HTTPS] begin...
[HTTPS] GET...
[HTTPS] GET... code: 200
{"given_cipher_suites":["TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256","TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256","TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256","TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256","TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384","TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384","TLS_ECDHE_ECDSA_WITH_AES_128_CCM","TLS_ECDHE_ECDSA_WITH_AES_256_CCM","TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8","TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8","TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256","TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256","TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384","TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384","TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA","TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA","TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA","TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA","TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256","TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256","TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384","TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384","TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256","TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256","TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384","TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384","TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA","TLS_ECDH_RSA_WITH_AES_128_CBC_SHA","TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA","TLS_ECDH_RSA_WITH_AES_256_CBC_SHA","TLS_RSA_WITH_AES_128_GCM_SHA256","TLS_RSA_WITH_AES_256_GCM_SHA384","TLS_RSA_WITH_AES_128_CCM","TLS_RSA_WITH_AES_256_CCM","TLS_RSA_WITH_AES_128_CCM_8","TLS_RSA_WITH_AES_256_CCM_8","TLS_RSA_WITH_AES_128_CBC_SHA256","TLS_RSA_WITH_AES_256_CBC_SHA256","TLS_RSA_WITH_AES_128_CBC_SHA","TLS_RSA_WITH_AES_256_CBC_SHA","TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA","TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA","TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA","TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA","TLS_RSA_WITH_3DES_EDE_CBC_SHA"],"ephemeral_keys_supported":true,"session_ticket_supported":false,"tls_compression_supported":false,"unknown_cipher_suite_supported":false,"beast_vuln":false,"able_to_detect_n_minus_one_splitting":false,"insecure_cipher_suites":{},"tls_version":"TLS 1.2","rating":"Probably Okay"}
Waiting 2min before the next round...
This confirms my Arduino is working.
Is there a way to test connection to my website or is it now a case of changing my existing UV code to work via SSL?