Quote:
Originally Posted by RyanCahoon
To answer the original question, the AdaFruit cable you linked is meant for TTL level signals, whereas the RS-232 port uses much higher voltages.
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You could use a RS-232 to TTL adapter board based on the MAX3232 chip (most are), like this one:
https://www.amazon.com/Mini-RS232-Co...ywords=max3232
We chose this one because it has solderable pads, so we didn't have to connect to the pins of a serial connector. It's reasonably easy to code with in C++. I don't know about coding it in Java, but it should be similar.