| Problem | Fix |
|---|---|
Build error about Java version / Math.clamp / org.wpilib not found |
You're in the wrong VS Code. Open WPILib VS Code 2027 (Task 0). |
| "Vendor dependency" errors | Use the vendordeps that came with the Template. Old 2026 vendordeps don't work with 2027. |
| Can't find the Romi's WiFi | Romi on? Batteries charged? Right Romi (name on the bottom)? Someone else already connected? |
| Romi won't connect | Update its firmware: Romi imaging guide |
| Problem | Fix |
|---|---|
| How do I run it? |  (top right) → Simulate Robot Code → Sim GUI |
| My OpMode isn't in the list | It must be in first/robot/opmodes/, be public, have @Teleop or @Autonomous, and have a constructor that takes Robot. |
| Pressed Enable, nothing moves | Did you pick an OpMode? Teleop needs Drive. For a real Romi, set useRealRomi = true in build.gradle. |
| Pretend Romi doesn't move | The robot must be enabled. For sim-only, useRealRomi = false in build.gradle. |
| Everything freezes | A while loop inside a command is missing coroutine.yield(); |
Command won't compile: "named" |
Every command needs .named("Some Name") at the end. |
| Problem | Fix |
|---|---|
| Drives backward | Flip the - signs on the joystick lines in DriveTeleop. |
| Heading goes down when turning left | Check the - in getHeadingDegrees() (Task 1 Step 4a). |
| PID never finishes | Real motors need more push. Raise kDriveP / kTurnP. |
- Watch numbers: open the NetworkTables view, or graph them with Plot → New Plot Window.
System.out.println("hi");prints to the VS Code terminal.
- WPILib Romi docs
- Commands v3 design doc
- Ask an experienced team member!