can you connect it to a PC and capture the serial output using a terminal capture program like RealTerm or EasyTerm and post that so we know what to expect from the calculator and at the same time verify it is sending serial at some specific speed ?
can you connect it to a PC and capture the serial output using a terminal capture program like RealTerm or EasyTerm and post that so we know what to expect from the calculator and at the same time verify it is sending serial at some specific speed ?