Here's a list of issues that caused teams to not work on the field at San Diego. Many of these were already mentioned, but I wanted to reiterate them.
Communications, Robot Side:
- cRIO lost power after a very hard hit. It looks like it was probably the fuse within the cRIO. cRIO was replaced.
- Radio not configured through kiosk.
- Radio powered through breaker not through dedicated 12v radio supply on PDB
- Loose wires on the on the battery, breaker, or PDB, which either came out, or caused excess current which dropped the battery voltage low enough to cause problems. Fixed by tightening all power connections.
- Radio located next to lots of metal, motor, or speed controller. Fixed by relocating radio
- Power cable has loose connection with radio. Fixed by securing radio power cable or replacing it.
Communications, DS side:
- Driver station account needs to be "Driver" (case sensitive) if you're using your own laptop.
- Make sure you set up your DS in the correct position. It won't connect to the field if you aren't.
- Make sure that ethernet cables positively latch on the classmate's ethernet port. If yours is broken (ours is), you can use a USB ethernet adapter, or another laptop.
- Do not set up a bridged connection that uses the ethernet port that FMS uses. It will not connect to the field.
Joysticks don't work:
- USB hub was unplugged, so joysticks not detected. Double check, especially if you have a multi-part control station, or the usb hub is mounted in an unsafe location
- There were at least 3 cases where joysticks did not work on the field. If the team went to the setup tab and pressed the buttons on the joysticks, the joysticks did not change color like they should. This may have some interaction with waking up from sleep mode. It was fixed by unplugging the hub and plugging it back in. Check that your joysticks work (eg light up on the setup tab when you press a button on the joystick) when you're setting up prior to the match.