问 sim800c中支持的密码套件是什么？

我创建了 @roberto-caboni 建议的测试环境。我用SIM800L和SIM800C进行了测试。密码套间是一样的。

研究结果如下：

/* SIM800L firmware revision */
AT+CGMR
Revision:1418B05SIM800L24
/* SIM800C firmware revision */
AT+CGMR
Revision:1418B08SIM800C24_BT
/* I wiresharked a SLL connection to my server, the results:
Cipher Suites (9 suites)
    Cipher Suite: TLS_RSA_WITH_RC4_128_MD5 (0x0004)
    Cipher Suite: TLS_RSA_WITH_RC4_128_SHA (0x0005)
    Cipher Suite: TLS_RSA_WITH_AES_128_CBC_SHA (0x002f)
    Cipher Suite: TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA (0x0016)
    Cipher Suite: TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA (0x0013)
    Cipher Suite: TLS_RSA_WITH_3DES_EDE_CBC_SHA (0x000a)
    Cipher Suite: TLS_RSA_WITH_DES_CBC_SHA (0x0009)
    Cipher Suite: TLS_RSA_EXPORT_WITH_RC4_40_MD5 (0x0003)
    Cipher Suite: TLS_DHE_DSS_WITH_DES_CBC_SHA (0x0012)
*/

修订： 1418B09SIM800C24_TLS

Cipher Suites (10 suites)
    Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (0xc02b)
    Cipher Suite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)
    Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 (0xc023)
    Cipher Suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 (0xc027)