Hello,One offered me an Arduino at Christmas.I made my first step with it and understood the basics.Today, i try to make it communicate via FBus with a Nokia (few or false documentation on this ... another problem).And I noticed some unexpected voltage. Here is a summary:- Arduino UNO rev 3- Program loaded : blink example- Measurement : voltage between ground and TX pin : 4.6 V voltage between ground and RX pin : 4.9 V- LEDs : RX and TX are offIs this normal ?I mean, in serial communication, does a HIGH value is expected when nothing is communicated ?Yes, that is the so called 'stop condition' for TTL level serial communications.Thank you for your help, I will come with many more question after that I guess !Loïc
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