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  • @Robin the certificates end up in flash memory so won't use RAM.

    You could try confirming that the certificates really are the same as you put in... eg:

    oca == atob("MIIFgDCCA2gCCQD1KANs3obrTjANBgkqhk­iG9w0BAQsFADCBgTELMAkGA1UEBhMCVVMxCzAJBg­NVBAgTAk1BMQ8wDQYDVQQHEwZCb3N0b24xEzARBg­NVBAoTCkV4YW1wbGUgQ28xEDAOBgNVBAsTB3RlY2­hvcHMxCzAJBgNVBAMTAmNhMSAwHgYJKoZIhvcNAQ­kBFhFjZXJ0c0BleGFtcGxlLmNvbTAeFw0xNTExMj­cxMjIyMzFaFw00MzA0MTMxMjIyMzFaMIGBMQswCQ­YDVQQGEwJVUzELMAkGA1UECBMCTUExDzANBgNVBA­cTBkJvc3RvbjETMBEGA1UEChMKRXhhbXBsZSBDbz­EQMA4GA1UECxMHdGVjaG9wczELMAkGA1UEAxMCY2­ExIDAeBgkqhkiG9w0BCQEWEWNlcnRzQGV4YW1wbG­UuY29tMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMI­ICCgKCAgEAwjlJ3eyrnGIiJiplY5mvIaaoMC20oR­4Jx5+FOXNJJhjSz9mOoqcpEe2U6ZmmVfcpc8zdt1­f9KkED5yjzpnF02CG+KYaRs/Rfj0NJejcpBN3Hn4­R6+yJek2rYrKi4uZyMZrWx/8PTp/lEypAEBf/2vX­9WYNgi5eWyHeHEfJ4yucRI1UgRw5W/RLYoAePAPT­1ekB66NbosBIZhRXJvjqED/jOMOlpHgNPQHTUyPj­5lR8ZTSduATUQac6qRx9pdYyVICVE8bxma56R0pX­8Cdx/wg+5gKOXUPuXW1xTPNuH4JpNTd7huJwa8Ff­0ReKTLHZk1hYB7uDzL5moc8kylYEwz2W13KyXxZb­h3kClVSNZvPbrcp1eWoyJyznLRLVv3cCWQwmEMr1­071Th4/6dnUZ/wl085HIjV93X9H8nzZ7VBkwHD8Z­HB1foW0/jgbK0qsH2gV7frGFPxZydmk/Nrwdl3Rt­oM+xEpQI7cPYDf9j/CX/ynM4LfOeHhVfMrx0I3E8­wNPX9MU+O+Pu6wsT4WbGkNhcuS4oE2As13obMnUe­bLwOxxWu4ErI8WG1ITwRVEQik72Iqj0d5vvjZw2z­5TFzkMB/Tl3qNvAp9jzpNtvRUyrS6KRY667BZOJ9­TJK/5+jenGEi7+UNq9ig490WnYDBPA/N9QSPHCx6­TLNapayQvem5UCAwEAATANBgkqhkiG9w0BAQsFAA­OCAgEAS9mpX4QgnwntvH9wutY+zOWBLejd/psjjV­mZdYzeVC6fkCaw0Qj1unszq58EHlA8275ARTYyic­RHIYLF3ZDYwMxUCu7iIQJUzVYJRqowV2Ap4OeMlh­5sUb/Wlmhs5TauSZ1gz4LqMqnGkVMrvvU+1WX2eP­Fl81nnr1UMb2+dLzC0Gj2jH3tlzW76yFD4gElR8W­4ypgvAw9pFKlSuOc4y6KS32jaOJk9zWSigPQadI1­pOSSk+iKuPp98BBY/gDw+FBKUNARo3ci5F2s1dJZ­wQSCnuBhVb1r+3aHjnp4PAO7Mq7YyFf7qwSmuA++­nF7TGhu3lf3hY1Jzgo+rOi+pFZtebCsewLDJjyNU­xhQkOIf4TutC9wPJUtCKDpLA0iJso1AX5297iap5­g7y0J0fUls16U+F0arsBHhgIN5ARifImeE+1bVVx­7kLtklA23njczUt88ylgsCEnYyu0U+0+kwAkMDyP­WDd3KPfDhykhQJ0Ev/44+JTDk3zydO2YvCpqMqLu­hbZr9mvmV7uzJVbFnLr3sU75upv0N4JQLIn3XyTt­DbWjTqA8d6qbG5BxYL5xkrWRxo3Fd6r1AyFje1il­KUkwZ1YZZCDvgv/2uEFyL0VlgfHfBhNbN2nsTTxi­jKc19ROeIRXl7eqWq/cyIbA/5LzEy2UbbEhKIroP­GosQML4sc=")
    

    But as a start, since you have the RAM on ESP32, maybe ignore all the flash storage stuff for now. Just remove fwrite and set the variables directly to the result of running atob.

    ... also use the certificates that I used in the example rather than making your own - for now.

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