Issues with Serial Comm roboRio to RioDuino

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Originally Posted by Katie_UPS

I haven't used this set up before, but I've done a serial thing or two before. I found the WPI Library so I'm just going off that and what I know.

readString takes in the number of characters to read, not bytes, which is probably a non-issue, but I recommend using it without any parameters to see if there is more in the buffer for some reason. For troubleshooting, the writeString function returns the number of bytes written. I recommend printing that out.

I use the defaults on both sides. I know the arduino is no parity, 1 stop bit. I don't know what the default is on the roboRio. If it's different I could definitely envision some issues. Any idea what the roboRio defaults are?

The characters are ASCII characters, which is in itself a single byte per character. For readString, if I removed the numBytes param, I get the same value repeating many times (as expected -- I output the variable to serial on the arduino at 10Hz with no newline and no spaces).

Will look at the writeString function return, but not sure what it would tell me -- if more than 1 byte written, *why*? If exactly 1 byte written, what I expect but still no solution to this issue. All the values I see are between 0 and 255 so I know I'm pretty sure they're 1 byte in length