Servo Sketch Will Not Compile

What you see

Verify fails for a sketch using Servo. There is no single universal Servo error; preserve the exact first diagnostic from Build Output.

Likely causes

• The include or Servo object declaration differs from the bundled example.
• The selected target or another timer-dependent library conflicts with the sketch.
• A larger project exceeds flash or static SRAM limits even though a small Servo sketch builds.

Diagnostic steps

1. Open the known Servo example

   Create a separate Servo Sweep tutorial or library example, select the exact board, and Verify. Compare its real compile status and memory use on the Servo reference page.

2. Read the earliest diagnostic

   A missing Servo.h follows the library-not-found path. An undeclared object follows the identifier guide. A failed build is not evidence that a servo’s wiring or power is wrong.

3. Add integrations one at a time

   Reintroduce your other libraries and source files incrementally. Servo uses timers; PWM availability and timer interactions are board-dependent.

4. Separate compilation from motor testing

   Only after Verify succeeds should you test a positional servo with appropriate power and common ground. Simulation models angle, not all real torque/current behavior.

Board-specific notes

The pinned library uses Timer1 on Uno. Consult the selected board’s library matrix and upstream Servo source before combining timer features. A successful compile is not physical motor validation.

Safe recovery

Return to the minimal working example, preserve the failed project, and document the first error with the selected board/profile.

Evidence and references

Reviewed 2026-10-23 against Circuitera’s actual behavior. An editorial review is separate from a physical board test.

• Servo upstream ↗