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It requires firmware modification on the elm chip to speak the correct protocols. Check out https://github.com/uholeschak/ediabaslib/blob/master/docs/Deep_OBD_for_BMW_and_VAG.md
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Scout Monitoring
Performance metrics and, now, Logs Management Monitoring with Scout Monitoring. Get early access to Scout Monitoring's NEW Ruby logging feature [beta] by signing up now. Start for free and enable logs to get better insights into your Rails apps.
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Puts Debuggerer
Ruby library for improved puts debugging, automatically displaying bonus useful information such as source line number and source code.
https://github.com/ is probably a more reasonable option?
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I've referenced https://github.com/JacekGreniger/stm32-vagcanlogger/ and some articles in Russian see https://rusefi.com/forum/viewtopic.php?p=46611#p46611