I have a 2002 car with EDC15 ECU, I want to read RPM and Speed throw ECU. I did get RPM wire (7volts) and Speed wire (11volts) directely from ECU and linked it to arduino nano using resistances to reduce voltage. when I compile I get always ZERO for both speed and RPM. Any suggestions please. Tha…

[image] dhamu: Use digital pins that support interrupts, like D2 or D3 on Arduino Nano. [image] makavali: I will use D9 and D10 that are free on my arduino There are only certain pins that can be used for interrupts. There is a list of of the pins that can be used at: docs.arduino.cc/…

Read RPM and SPEED from ECU EDC15

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horace August 8, 2025, 11:56am 3

maybe worth having a look at post can-an-arduino-perform-this-task-pulse-counter which is also measuring RPM

what microcontroller are you using?

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Read RPM and SPEED from ECU EDC15

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