I have an i-bus to rs232 converter - yet to be used - and if I just plonk a terminal emulator on that do I just need to capture the strings as they appear or do I need to send any queries onto the bus? Personally I am interested in where you pick up the i-bus from (physically) and how do you intercept (and store) the messages. If you want to pick up the messages, you can do it anywhere on the bus. Connect your adapter, set your baud rates in hyperterminal or similar, and just watch the traffic go by. Harder is deciding what all those bytes mean. Being BMW IPR I'm sure that there are issues with people disclosing information, though there seems to be information in the wild on some Beemer forums. You can start transmitting yourself but there are pitfalls depending on the interface implementation.
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