cannot recover corrupted preamble about rtl-wmbus

[xaelsouth]

Hello Freax13,

thanks for input. Check out the new version of rtl_wmbus. Got this output with your file attached. From those two lines (each line for each decoder), pick the one which starts with C1;1;1. That means: Mode C1, CRC check ok, T1 ok (is always the case for C1 mode, obviously).

cat trunc.dat | build/rtl_wmbus
C1;1;1;2024-05-09 16:02:29.000;13;8;20338739;0x574468503987332094088c0066900f002c256d4c09001379a347c9de055e7a6d00300710f1b5a1a06f8306237d16af2fc907479e250b872378287765676ec98652cc97572702b0ed8cefbe575e68194d59dad9b40fdd9269
C1;0;1;2024-05-09 16:02:30.000;8;6;20210116;0x574468501601212094088c0013900f002c2579610901e04839848dad6f3c7a7900300710719e84d90bd144364d15579431a00ee6e761e308e774232e8e6b2501c9753ec028b273bddee520d299996eb76edd6b9f0f486669

[Freax13]

Thank you for your answer. Unfortunately, these aren't the messages I'm looking for. It seems that I didn't truncate the file correctly and accidentally left some other messages in there. I apologize for the confusion. I'm looking for this message:

T1;1;1;2024-05-09 17:00:05.000;136;128;02717473;0xce44c5147374710231087a2800c0251377b1a3250b426eb794f4b558620682803946f8c2aaa22e39cf081fc44f4d9c649c005580814ee8b195beda83537cd983f5ae1e770b59c81d8fb75883c84d9c72183cf9ad6cb4620bafba5e669aa14d59b259fc5eca5843ff1c1238f5256bd5b19668107dee242c8923eb89238173e8af0c34057f715ba88b9d0873dce0c44076f1025bcfdce42a9fb3f30c8178c14dd2779bb188cbcbf12853ad2e9fe82146d640963a5620cad0d66cf58342dd3cf366fd5e6eefb2ab861d1cce533c5215fc

(I got this line by setting ACCESS_CODE_T1_C1_ERRORS to 6 instead of 1 as described above.)

I tried running the code from the latest master branch but didn't notice any changes.

[xaelsouth]

You are right. In the output I posted, there was an another manufacturer 0x5068. Interesting. This issue #49 seems to be like yours. Should investigate this further, not as simple as I thought.

[xaelsouth]

One more try?.. I think the very first datagram is what you are looking for: HCA 0x08 with manufacturer ID = 0x14c5 (Engelmann).

cat trunc.dat | build/rtl_wmbus
T1;1;1;2024-05-09 21:48:56.000;46;49;03110176;0xce44c5147601110331087ae600c0255354edb37b903eb74222fdb68606c2421f0576e25a196298a763ebd36a12100748a0b82fe509363bffba18f0955b5ee340c31f77343d7253cfb3a62f5f28aa260db7cc430910d99371f569387b9a60aad2af482a3efff6c0f9567d5755d479717481e053cf60af910009e74118fb66212ff4c975e49cb34febdfc1bbf528049192d2bf37bced9eb4896a949599542f43b2a90eef941ab96334e479e357418cc2c50bee5cd2cadddd559139b467c593fa36c7280dcc012a46336124248c7dcb6f
T1;1;1;2024-05-09 21:48:56.000;50;51;03110176;0xce44c5147601110331087ae600c0255354edb37b903eb74222fdb68606c2421f0576e25a196298a763ebd36a12100748a0b82fe509363bffba18f0955b5ee340c31f77343d7253cfb3a62f5f28aa260db7cc430910d99371f569387b9a60aad2af482a3efff6c0f9567d5755d479717481e053cf60af910009e74118fb66212ff4c975e49cb34febdfc1bbf528049192d2bf37bced9eb4896a949599542f43b2a90eef941ab96334e479e357418cc2c50bee5cd2cadddd559139b467c593fa36c7280dcc012a46336124248c7dcb6f
C1;1;1;2024-05-09 21:48:56.000;13;8;20338739;0x574468503987332094088c0066900f002c256d4c09001379a347c9de055e7a6d00300710f1b5a1a06f8306237d16af2fc907479e250b872378287765676ec98652cc97572702b0ed8cefbe575e68194d59dad9b40fdd9269
T1;1;1;2024-05-09 21:48:56.000;132;126;02717473;0xce44c5147374710231087a2800c0251377b1a3250b426eb794f4b558620682803946f8c2aaa22e39cf081fc44f4d9c649c005580814ee8b195beda83537cd983f5ae1e770b59c81d8fb75883c84d9c72183cf9ad6cb4620bafba5e669aa14d59b259fc5eca5843ff1c1238f5256bd5b19668107dee242c8923eb89238173e8af0c34057f715ba88b9d0873dce0c44076f1025bcfdce42a9fb3f30c8178c14dd2779bb188cbcbf12853ad2e9fe82146d640963a5620cad0d66cf58342dd3cf366fd5e6eefb2ab861d1cce533c5215fc
T1;1;1;2024-05-09 21:48:56.000;136;128;02717473;0xce44c5147374710231087a2800c0251377b1a3250b426eb794f4b558620682803946f8c2aaa22e39cf081fc44f4d9c649c005580814ee8b195beda83537cd983f5ae1e770b59c81d8fb75883c84d9c72183cf9ad6cb4620bafba5e669aa14d59b259fc5eca5843ff1c1238f5256bd5b19668107dee242c8923eb89238173e8af0c34057f715ba88b9d0873dce0c44076f1025bcfdce42a9fb3f30c8178c14dd2779bb188cbcbf12853ad2e9fe82146d640963a5620cad0d66cf58342dd3cf366fd5e6eefb2ab861d1cce533c5215fc
C1;0;1;2024-05-09 21:48:56.000;8;6;20210116;0x574468501601212094088c0013900f002c2579610901e04839848dad6f3c7a7900300710719e84d90bd144364d15579431a00ee6e761e308e774232e8e6b2501c9753ec028b273bddee520d299996eb76edd6b9f0f486669

[Freax13]

Yup, your changes resolved this issue. Thank you so much!