Please check the attached snap especially highighted pins TX and RX(pin 0 and pin 1). Can we use these pins for general purpose digital i/o? or they can only be used as TX and RX pins?
These pins have resistors to the USB chip‘s Rx/Tx.
Suggest you avoid these as they are needed to program the 328.
@abtj_90, please stop creating threads in the Introductory Tutorials section.
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Rather than ask a question about every pin why not read the documentation?
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