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Serial On Digital Pin


Hi Guys… hello! :smiley:

I bought this GPRS Shield (, but I need a class that “emulates” a serial communication over Di7 (RX) and Di8 (TX).


Using software UART for GPRS is a very bad idea. Just wire your shield to one of serial pins


Good Gus…

But, Digital Pin 0 is COM1 IN, this is the same as TX ? or RX ?



by definition, IN is RX (recieve) and OUT is TX (transmit).