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javahandshakeioio

IOIO not connecting to PC, "waiting for handshake"

I, as well as many others, have had a problem with the IOIO OTG connecting with the PC, when building from eclipse.

We are using the ADT version of eclipse, with all libraries properly imported. When running the HelloIOIOConsole program, the console begins to connect, but hangs the connection. The last console message is [console]: waiting for handshake, and no error is thrown. The program will build, but the IOIO will not connect to the PC.

What causes this, and how can we fix this?

Solution

  • We found the problem: We did not specify the COM port.

    We were able to fix this by going into eclipse ADT, under Run > Run Configuration > variables tab, and adding the line -Dioio.SerialPorts=COMXX, where XX is the COM port that the IOIO is connected to, to the VM variables box.

    After adding -Dioio.SerialPorts=COMXX, it no longer checked every single COM port, which was causing the program to skip over the proper port.

    As we were using the COM16 USB port, we added the line -Dioio.SerialPorts=COM16 which removed all connection issues and were able to run the program flawlessly.