You're in the minority...good for you...Originally Posted by supersonic
Looks to me like you're using the internal oscillator on the 12F683 (i.e. GPIO4 & GPIO 5 are used). The internal clock is probably off the nominal 4MHZ by a bit on one side of the other (i.e. might be 4.1mhz, might be 3.9mhz, whatever). Jist of the story, you're 2400 baud is based off the oscillator...if the oscillator's off, the 2400 baud is off.
Write yourself a quicky program to generate a square wave of a known frequency, use a 'scope or freq. counter to count that square wave, and tweak the OSCTUNE to get 4mhz exactly.
Or try slowing down to 300 baud and see what happens. Slower baud rates are generally more tolerant of being out of tolerance.
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