meeper123
commented
11 months ago I would look for any shorts to ground, maybe try using TILP instead of ti-connect and check if there is a difference. it could just be a loose or dirty connector. I don't have a ti-89 to test it on so I can't see if it is a problem with code, do you have the cable type set as gray link.
I also have a problem: Ti Connect sometimes says it can see my Ti-89, but then crashes when I try to select it. TiLP never shows it in the List but sometimes is able to load a screenshot (strange, I know), but If I try to transmit a file, it says "Msg: timeout occured while reading from the device. Cause: check that link cable is plugged and/or the calculator is ready. System: (1977249328) The system cannot find the path specified." or just the timeout part without the "Cause". I am using the code provided by @meeper123, with no succes. My arduino is a UNO clone and my cable is from a "DATA CONNECTION KIT" for the Ti8x (it says windows 3.xx is requiered on the back of the box...). I cut the Serial port of (which didn't work with a sketchy china serial to usb adapter) and soldered jumper cables to the leads. This could be a coincidence but the last time the screenshot transfer worked, I pushed the cable in pretty hard to see if it was the Cable. I also adjusted the Timeouts: const unsigned long TXTIMEOUT = 100; //ms const unsigned long RXTIMEOUT = 50; //ms In TiLP the timeouts are at the defaults. Does somebody know what to do?