The logical communication(rx & tx) between the shield and Arduino Uno doesn't work. Arduino (rx & tx) supply is 0 & 5 V but this is 0 & 2.8 V. What am I to do?
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Post a link to where you bought the shield. It's extremely unlikely that a shield designed to plug right into a 5 V board would not also include any necessary level shifting circuitry.per1234– per12342017-09-10 21:24:22 +00:00Commented Sep 10, 2017 at 21:24
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1 Answer
Use a logic level converter.
A logic level converter is a small device that converts between different logic levels, for example between 5V and 3.3V.
I am not affiliated with Sparkfun, I just think they are the most informative source.
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I think ur rightReza Qasemi– Reza Qasemi2017-09-10 21:14:19 +00:00Commented Sep 10, 2017 at 21:14