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Контрольная сумма связи UART

#serial-port #uart #crc

#последовательный порт #uart #crc

Вопрос:

Я пытаюсь декодировать / понять протокол последовательной связи (UART) между кондиционером и модулем Wi-Fi. Я использовал Docklight для отслеживания связи, у меня есть некоторые результаты, как включать блок переменного тока и выключать, менять режимы и т.д. Но я не понимаю, как вычислить CRC. Вот пример:

 18/08/2020 17:15:28.292 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 A9 28 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 04 4F 39

Журнал связи пожалуйста, смотрите полный журнал ниже:

 Mobile APP ON
18/08/2020 17:15:06.001 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:15:06.651 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 00 A9 28 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C 18 F3
18/08/2020 17:15:15.917 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:15:16.589 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 00 A9 28 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C 18 F3 
18/08/2020 17:15:25.928 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:15:26.605 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 00 A9 28 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C 18 F3
POWER ON FROM APP -
18/08/2020 17:15:28.292 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 A9 28 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 04 4F 39 
18/08/2020 17:15:28.982 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 A9 28 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 00 3D 6A
18/08/2020 17:15:35.928 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:15:36.653 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 A9 28 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C 8F 7B 
18/08/2020 17:15:45.496 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 42 A9 28 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 05 83 05
18/08/2020 17:15:46.151 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 00 A9 28 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 00 AA FE
18/08/2020 17:15:46.531 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:15:46.909 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 00 A9 28 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C 18 F3 
18/08/2020 17:15:56.029 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:15:56.719 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 00 A9 28 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C 18 F3 
18/08/2020 17:16:01.325 [Wifi to Ciat] - AA 1E AC B2 00 00 63 00 00 0D 01 01 01 69 03 A8 C0 00 00 00 01 01 00 00 00 00 00 00 00 00 3B AA 20
                       - AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:16:06.621 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 00 A9 28 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C 18 F3 
18/08/2020 17:17:31.039 [Wifi to Ciat] - AA 1E AC B2 00 00 64 00 00 0D 01 01 01 69 03 A8 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 3C
                       - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:18:02.095 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 00 A9 28 7F 7F 00 30 00 00 00 66 5F 00 00 00 00 00 00 00 00 00 9C C9 43
18/08/2020 17:18:02.220 [Wifi to Ciat] - AA 1E AC B2 00 00 65 00 00 0D 01 01 01 69 03 A8 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 3B
                       - AA 1E AC B2 00 00 66 00 00 0D 01 01 01 69 03 A8 C0 00 00 00 01 01 00 00 00 00 00 00 00 00 38

(…)

 Eco on in cool mode -
                                       - AA 23 AC 00 00 00 00 00 03 02 40 43 49 66 7F 7F 00 30 00 80 00 00 00 00 00 00 00 00 00 1E 00 00 00 1A EA 2A
18/08/2020 17:22:05.042 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 49 66 7F 7F 00 30 00 10 00 66 5F 00 00 00 00 00 00 00 00 00 00 85 35 
18/08/2020 17:22:11.244 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:22:11.925 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 66 7F 7F 00 30 00 10 00 66 5F 00 00 00 00 00 00 00 00 00 9C 37 E6 
18/08/2020 17:22:21.325 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:22:21.985 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 66 7F 7F 00 30 00 10 00 66 5F 00 00 00 00 00 00 00 00 00 9C 37 E6 
Eco off in cool mode -
18/08/2020 17:22:22.025 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 49 66 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 1B A2 F1
18/08/2020 17:22:22.684 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 49 66 7F 7F 00 30 00 00 00 66 5F 00 00 00 00 00 00 00 00 00 00 77 53 
18/08/2020 17:22:31.234 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:22:31.923 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 66 7F 7F 00 30 00 00 00 66 5F 00 00 00 00 00 00 00 00 00 9C C5 68 
18/08/2020 17:22:41.272 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:22:41.901 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 66 7F 7F 00 30 00 00 00 66 5F 00 00 00 00 00 00 00 00 00 9C C5 68 
18/08/2020 17:22:51.311 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:22:51.964 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 66 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C 14 18 
Fan auto cool mode -
18/08/2020 17:22:52.421 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 49 66 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 1C 21 71
18/08/2020 17:22:53.133 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 49 66 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 00 A6 23 
18/08/2020 17:23:01.326 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:23:01.997 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 66 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C 14 18
18/08/2020 17:23:11.373 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:23:12.108 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 66 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C 14 18
Fan high cool mode -
18/08/2020 17:23:15.540 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 49 50 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 1D 73 34
18/08/2020 17:23:16.272 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 49 50 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 00 0A D5
18/08/2020 17:23:21.383 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:23:22.061 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 50 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C B8 8A
18/08/2020 17:23:30.203 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 49 3C 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 1E 89 31
18/08/2020 17:23:30.881 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 49 3C 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 00 4B A8 
18/08/2020 17:23:31.278 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:23:31.992 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 3C 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C F9 5D
18/08/2020 17:23:41.298 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:23:41.972 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 3C 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C F9 5D
18/08/2020 17:23:42.681 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 49 50 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 1F CF D6
18/08/2020 17:23:43.373 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 49 50 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 00 0A D5 
Fan mid cool mode -
18/08/2020 17:23:51.277 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 49 3C 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 20 28 90
18/08/2020 17:23:51.931 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 49 3C 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 00 4B A8 
18/08/2020 17:23:52.059 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:23:52.670 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 3C 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C F9 5D 
18/08/2020 17:24:01.275 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:24:01.986 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 3C 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 9C F9 5D 
18/08/2020 17:24:01.986 [Wifi to Ciat] - AA 1E AC B2 00 00 69 00 00 0D 01 01 01 69 03 A8 C0 00 00 00 01 01 00 00 00 00 00 00 00 00 35 AA 23
                       - AC 00 00 00 00 00 03 02 40 43 49 28 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 21 CB 00
18/08/2020 17:24:09.492 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 49 28 7F 7F 00 30 00 00 00 66 60 00 00 00 00 00 00 00 00 00 00 50 B7
18/08/2020 17:24:11.350 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:24:11.940 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 9C 8B E1
18/08/2020 17:24:13.682 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 49 3C 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 22 94 22
18/08/2020 17:24:14.351 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 49 3C 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 00 22 D3

…

 Fan low in cool mode -
18/08/2020 17:24:17.570 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 49 28 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 23 77 52
18/08/2020 17:24:18.240 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 49 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 00 39 D0
18/08/2020 17:24:21.317 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C 
18/08/2020 17:24:21.988 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 9C 8B E1 
18/08/2020 17:24:31.399 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:24:32.046 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 49 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 9C 8B E1 
20 st in cool mode -
18/08/2020 17:24:38.338 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 44 28 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 24 D1 FC
18/08/2020 17:24:39.031 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 44 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 00 4F BF 
18/08/2020 17:24:41.429 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:24:42.098 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 44 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 9C FD 74 
18/08/2020 17:24:51.308 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:24:51.978 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 44 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 9C FD 74 
21 st in cool mode -
18/08/2020 17:24:55.134 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 45 28 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 25 18 B3
18/08/2020 17:24:55.799 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 45 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 00 A5 68
18/08/2020 17:25:01.468 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:25:02.113 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 45 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 9C 17 59 
22 st in cool mode -
18/08/2020 17:25:09.362 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 46 28 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 26 5A 6F
18/08/2020 17:25:10.035 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 46 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 00 82 8A 
18/08/2020 17:25:11.392 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:25:12.024 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 46 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 9C 30 3F 
23 st in cool mode -
18/08/2020 17:25:20.731 [Wifi to Ciat] - AA 23 AC 00 00 00 00 00 03 02 40 43 47 28 7F 7F 00 30 00 00 00 00 00 00 00 00 00 00 00 1E 00 00 00 27 93 34
18/08/2020 17:25:21.405 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 02 C0 01 47 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 00 68 A3
18/08/2020 17:25:21.452 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:25:22.119 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 47 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 9C DA 94 
18/08/2020 17:25:31.572 [Wifi to Ciat] - AA 20 AC 00 00 00 00 00 00 03 41 81 00 FF 03 FF 00 02 00 00 00 00 00 00 00 00 00 00 00 00 03 CD 9C
18/08/2020 17:25:32.247 [CIAT to WIFI] - AA 22 AC 00 00 00 00 00 03 03 C0 01 47 28 7F 7F 00 30 00 00 00 65 5F 00 00 00 00 00 00 00 00 00 9C DA 94

Спасибо,

Комментарии:

1. Как вы думаете, где находится CRC? Почему вы думаете, что существует CRC? Я вижу много повторений в последних двух байтах, так что это, вероятно, не CRC.

2. Привет, Марк, я просматривал последние три байта, которые меняются с каждым отправленным сообщением от Wi-Fi к блоку переменного тока (CIAT). Третий с конца увеличивается на, но последние два, похоже, все время разные, не могли бы вы сказать мне, пожалуйста, где вы можете увидеть много повторений? Спасибо

3. Хорошо, теперь я вижу, что повторяется все сообщение, а не только последние два или три байта.

4. Похоже, что в трех ваших сообщениях отсутствуют два возможных контрольных байта в конце. Они начинаются с AA 1E AC B2 00 00 64 , AA 1E AC B2 00 00 65 и AA 1E AC B2 00 00 66 .

5. Привет, Марк, не могли бы вы объяснить мне, каковы последние три байта, если не CRC, пожалуйста. Я действительно изо всех сил пытаюсь это понять.

Ответ №1:

Последние два байта не являются CRC сообщения. Они не подчиняются свойству линейности CRC.