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808AWD325xi,
Thank you for the work you've done. This indeed was my idea to handle voltage reading done directly by the interface. Since release I found one additional call which seems to return true/false values for ignition and power, but neither of those seem to be actually used by ISTA+. By looking at the code of ISTA+ I saw that KL15 and KL30 values are only displayed for an ICOM. There is some code also specific for PTT and FUNK interfaces. I don't have access to any car with K-Line at the moment, but tomorrow there hopefully will be one and I will try to see it ISTA+ can be fooled somehow. Not yet sure how it detects ignition changeover for non-ICOM interfaces as well (for ICOM it seems to use voltages measured by ICOM itself, so I hoped it uses the same way for other interfaces). There is clearly work to done yet.