ISRG Root X1 certificate (used as root for MQTT, OTA and other servers) is valid until June 4, 2035 14:04:38
Telegram API certificate is valid until June 29, 2034 20:06:20
##digi_cert.pem DigiCert Global Root CA is valid until November 10, 2031 3:00:00
##digi_cert_g2.pem DigiCert Global Root G2 is valid until January 15, 2038 12:00:00