How to use Arduino data from the USB on RPi - Raspberry Pi Forums

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hi there,
have rigged arduino rpm detector using hall effect sensor , , works well. down loaded arduino ide lap top , used serial monitor see reading coming in, nice. want same thing using rpi , use incoming readings arduino drive graphical interface, thermometer style widget thats color coded , bad speeds. first problem have not sure how capture incoming reading usb port, there library available working usb, use lazarus/fpc coding. know of examples of such coding. information helpful.
many thanks.
mm

under linux (as under windows) arduino board seen serial port have access data talking or listening serial port.

beware of logic level arduino's board powered 5v , raspi ios not 5v tolerant.


raspberrypi



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