Help me about communicating PIC with cellular phone...

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  1. - 1st November 2006, 18:47 #4
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    dhouston
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    Try cross-connecting TX & RX. That is, PIC-RX to Nokia-TX and vice versa. If you need to invert the logic (likely), see...or you could use two other of the PIC's pins and use SerIn & SerOUt so you can set the logic to inverted.

    If the Nokia uses RS232 voltage levels (unlikely) you need current limiting resistors in the TX & RX lines. See the PBP manual pages for SerIn, SerOut.
    Last edited by dhouston; - 1st November 2006 at 18:54.
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