Comments (3)
JRJian
commented on July 29, 2024
found it.
LTOBD2CommandELM327_IGNITION_STATUS
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mickeyl
commented on July 29, 2024
While LTOBD2CommandELM327_IGNITION_STATUS will definitely do what it's supposed to, please note that all the implementations of ELM327 that I know are having ATIGN wrongly implemented and will return ON as soon as the chip has power, i.e. no matter whether you really have ignition on or not.
Unfortunately there doesn't seem to be a way to reliably tell this by looking at the OBD2 responses – at least I don't know any. The only thing you can tell is whether the engine is actually running or not (by checking RPM).
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JRJian
commented on July 29, 2024
@mickeyl Thanks for your comment. After reading your comment, I changed to use RPM to detect engine light status.
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