Roomba: geplante Software-Obsoleszenz?

Im Log mei­nes Home Assistant taucht sowas auf, endlos:

2019-12-24 07:17:58 ERROR (Thread-2) [roomba.roomba] Error: [SSL: DH_KEY_TOO_SMALL] dh key too small (_ssl.c:1056)
2019-12-24 07:18:02 ERROR (Thread-2) [roomba.roomba] Error: [SSL: DH_KEY_TOO_SMALL] dh key too small (_ssl.c:1056)
2019-12-24 07:18:08 ERROR (Thread-2) [roomba.roomba] Error: [SSL: DH_KEY_TOO_SMALL] dh key too small (_ssl.c:1056)
2019-12-24 07:18:11 ERROR (Thread-2) [roomba.roomba] Error: [SSL: DH_KEY_TOO_SMALL] dh key too small (_ssl.c:1056)
2019-12-24 07:18:13 ERROR (Thread-2) [roomba.roomba] Error: [SSL: DH_KEY_TOO_SMALL] dh key too small (_ssl.c:1056)
2019-12-24 07:18:16 ERROR (Thread-2) [roomba.roomba] Error: [SSL: DH_KEY_TOO_SMALL] dh key too small (_ssl.c:1056)

Ein tcp­dump zeig­te, daß Home Assistant und der Staub­sauger mit­ein­an­der mqtts spre­chen — also immer­hin SSL ver­wen­den, schein­bar mit einem kur­zen (1024 Bits? Sieht man das im TLS-Hand­shake?) DH-Key. Fin­de ich jetzt nicht dra­ma­tisch, wenn die Gat­tin den Traf­fic zwi­schen dem Raspi und dem Staub­sauger knackt…
Nur: was mache ich nach dem 21. Dezem­ber 2028?

~$ openssl s_client -connect 192.168.1.93:8883 </dev/null 2>/dev/null | openssl x509 -text -noout
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 3596268874817615816 (0x31e8837ce04c37c8)
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: C = US, ST = MA, L = Bedford, O = iRobot, OU = HBU, CN = Roomba CA
        Validity
            Not Before: Dec 21 05:42:19 2018 GMT
            Not After : Dec 21 05:42:19 2028 GMT
        Subject: C = US, O = iRobot, L = Bedford, ST = MA, CN = Roomba-69B8860C70539630
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                RSA Public-Key: (2048 bit)

😉