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Unread 08-08-2016, 16:01
FlamingSpork FlamingSpork is offline
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Re: Serial Communication (Java)

The Rio runs RS-232 at ±12 Volts (approx), while TTL is ±3.3 or 5. A 3.3V signal isn't enough to trigger a RS-232 circuit.

https://www.sparkfun.com/tutorials/215
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