That is the one thing i wasn't sure about, I was trying to program a "virtual" pull-down by sending a low signal constantly but I will add a resistor now and hopefully that works.
EDIT: Still not working correctly, I will try to trace the steps and see what happens. I will report back with the results!
Thanks again.
EDIT2: So I traced the connection and pinC.3 is at a steady 0.33V until I press the button and then it goes down to 0.00V. When the transmitter data pin shows 0.00V the receiver data pin shows 0.33V and when the transmitter data pin shows 4.5V the receiver data pin shows 0.00V. So something a little weird is going on here and I am not quite sure yet.
EDIT: Still not working correctly, I will try to trace the steps and see what happens. I will report back with the results!
Thanks again.
EDIT2: So I traced the connection and pinC.3 is at a steady 0.33V until I press the button and then it goes down to 0.00V. When the transmitter data pin shows 0.00V the receiver data pin shows 0.33V and when the transmitter data pin shows 4.5V the receiver data pin shows 0.00V. So something a little weird is going on here and I am not quite sure yet.
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