Not closed, but changed the "activation". + Changed the "advertising interval" to 2100 ms
"Login", works with known keys. OTA also works.
Set "Mi Token", "Mi Bind Key" and press "Login":

A piece of the activation log (sniffer + MiHome):
"Sent Read Request, Handle: 0x00xx" abbreviated as "Send enc_XX".
"Rcvd Read Response, Handle: 0x00xx" abbreviated as "Rcvd enc_XX".

// > Checking for transmission with MTU size
Send enc_10: a4 // Test MTU
Rcvd enc_19: 000004000612 // ?
Send enc_19: 000005000612
Rcvd enc_19: 0000040112121212121212121212121212121212
Send enc_19: 0000050112121212121212121212121212121212
// > Get Device id
Send enc_10: a2000000 // SYS_DEV_INFO_GET
Rcvd enc_19: 000000000200 // ?, 2 blks
Send enc_19: 00000101
Rcvd enc_19: 01000200000000626c742e362e316667336a736f
Rcvd enc_19: 0200726f73673030
Send enc_19: 00000100 // ACK
// ????
Send enc_10: 15000000 // REG_START_WO_PKI
Send enc_19: 000000030400 // ECC_PUBKEY?, 4 blks
Rcvd enc_19: 00000101
Send enc_19: 01003b412a2b060a1d7da21033ff4e584bf4f8f3
Send enc_19: 02001a9dee5c4dc95e198c4bc3be5953d6babfdb
Send enc_19: 0300415a9eda4e42ac53e864d1ebd6c9b4616ce5
Send enc_19: 04004c9f1e094e30fc77ce51 // 18*3+10=64 bytes
Rcvd enc_19: 00000100 // ACK
Rcvd enc_19: 000000030400 // ECC_PUBKEY?, 4 blks
Send enc_19: 00000101
Rcvd enc_19: 010025c4faa9e119108b3133915e663ee3d4d0fb
Rcvd enc_19: 02009ada216d9d91928725dea0bb88f44639f8a1
Rcvd enc_19: 0300bb69a33f849bdbb0c2be2b8910271244c5dd
Rcvd enc_19: 04006bc5edefc593dc2d8557 // 18*3+10=64 bytes
Send enc_19: 00000100 // ACK

Send enc_10: 13000000 // REG_VERIFY_SUCC
Send enc_19: 000000000600   // DEV_SHARE_INFO?, 6 blks
Rcvd enc_19: 00000101
Send enc_19: 01001904e3c44b8ab77b3e2f9b7371b4606d9a8a
Send enc_19: 0200e7c71cc8bc712b7d080af2153d8638b7701e
Send enc_19: 0300ab70d36fceb296c3f8805d4073216e542f93
Send enc_19: 0400523da93c45061966487db32dd32936159b3e
Send enc_19: 05006739aa0281d368eac3205bc87d419ebc838e
Send enc_19: 06007457 // 18*5+2=92 bytes
Rcvd enc_19: 00000100 // ACK

Send enc_19: 000000071600 // SERVER_CERT?, 22 blks 
Rcvd enc_19: 00000101
// send certificate: https://github.com/Ai-Thinker-Open/Telink_SIG_Mesh/blob/master/example/AT_Ali_Mesh/mesh/mi_api/certi/cryptography/mi_crypto.c#L46
Send enc_19: 0100308201773082011ea003020102020101300a
Send enc_19: 020006082a8648ce3d0403023022311330110603
Send enc_19: 030055040a130a4d696a696120526f6f74310b30
Send enc_19: 04000906035504061302434e3020170d31363131
Send enc_19: 050032333038323032355a180f32303636313131 
Send enc_19: 0600313038323032355a30233114301206035504
Send enc_19: 07000a0c0b4d696a696120436c6f7564310b3009
Send enc_19: 080006035504061302434e3059301306072a8648
Send enc_19: 0900ce3d020106082a8648ce3d03010703420004
Send enc_19: 0a00a752ecd44b6b3b17abc34f8300c6320f2e4c
Send enc_19: 0b00bec57a51034b5ecadf7347d745df8c3dbcfa
Send enc_19: 0c00aedb67b04cace5aff798182e43c5a444b627
Send enc_19: 0d00c2d7f361629d3f914802a3423040301f0603
Send enc_19: 0e00551d2304183016801496b7a27c39b1b96633
Send enc_19: 0f00a9f8d109b20060c8e6c511301d0603551d0e
Send enc_19: 1000041604145a29bffb2fb7500ce9c420f23d89
Send enc_19: 11009b6fe0803293300a06082a8648ce3d040302
Send enc_19: 1200034700304402205eb096d630f92f092ae39d
Send enc_19: 13001356f836c529697a355d765f4eccce785b89
Send enc_19: 14009a6d1602207e206b22aa04e6dee818c7d4c4
Send enc_19: 150080e5fabd99074bdecf45346e37f1cffd8646
Send enc_19: 160090 // 18*22+1=397 bytes
Rcvd enc_19: 00000100 // ACK
Rcvd enc_10: 11000000 // REG_SUCCESS

Xiaomi has released new 2.1.1 firmware #298

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