Why is my controller not detected when plugged in?

For security and privacy, web browsers do not listen to connected gamepads until the user presses at least one physical button on the controller. Press A, X, or any button after connecting your USB or Bluetooth gamepad to activate detection.

What is considered a normal or acceptable stick drift percentage?

A standard potentiometer thumbstick at rest typically exhibits a drift deviation of 1% to 6%, which is absorbed by in-game deadzones. A resting deviation above 10% to 15% causes noticeable in-game camera panning or unintended character movement and indicates a failing stick.

What is circularity error on a gamepad thumbstick?

Circularity error measures how closely a thumbstick's outer physical gate conforms to a perfect circle when rotated 360 degrees. High circularity errors (above 15%) indicate asymmetric sensitivity or non-uniform diagonal acceleration.

Can this tool test controller vibration / rumble motors?

Yes. Click the 'Test Vibration' button in the toolbar. The tool sends dual-actuator high and low frequency rumble pulses to test both the weak and strong vibration motors inside compatible controllers.

⚡ Real-Time HTML5 Gamepad API & Stick Drift Analyzer

Controller Test: Check Gamepad Buttons, Drift & Vibration

Test your Xbox, PlayStation DualSense / PS4, Nintendo Switch Pro, or PC controller online. Measure analog stick drift, trigger pressure depth, rumble vibration motors, and hardware polling rate (Hz) in real time.

● Press any button on your controller to connect...

Left Stick Drift 0.0%

Right Stick Drift 0.0%

Polling Rate 0 Hz

Circularity Error --%

Hardware Status Standby

Left Thumbstick (Axes 0, 1) X: 0.000 | Y: 0.000 Drift: 0.0% (Clean)

Right Thumbstick (Axes 2, 3) X: 0.000 | Y: 0.000 Drift: 0.0% (Clean)

Left Trigger (LT / L2) 0.00 (0%)

Right Trigger (RT / R2) 0.00 (0%)

How to Test a Controller in 3 Steps

Connect & Press Any Button

Plug in via USB or pair via Bluetooth. Press any physical button on your controller to grant the browser Gamepad API permission to receive input.

Inspect Stick Drift & Circularity

Release both thumbsticks completely to evaluate idle drift. Rotate them 360 degrees along the outer ring to measure circularity gate error.

Verify Triggers & Rumble

Slowly pull the analog triggers to test linear potentiometer depth (0% to 100%), and trigger the vibration motors to confirm dual-rumble health.

The Complete Guide to Controller Stick Drift, Polling Rates & Haptics

Gamepad controllers are complex electromechanical input devices. Understanding how analog thumbsticks, potentiometer wear, and polling intervals function is essential for competitive esports and diagnosing hardware faults.

What Causes Analog Thumbstick Drift?

Traditional controllers (such as the standard DualSense, DualShock 4, and standard Xbox Series controllers) rely on resistive potentiometers. Inside each thumbstick module, two plastic wiper arms sweep across carbon-printed film tracks:

Frictional Abrasion: Over hundreds of hours of intense gaming, the metal wiper blades physically grind away the microscopic carbon film, leaving conductive dust debris.
Center Spring Fatigue: The tiny steel return spring inside the gimbal loses centering tension, preventing the stick from settling back to true mathematical zero $(0.0, 0.0)$.
The Hall Effect Solution: Modern high-end controllers (like the Flydigi Vader or 8BitDo Ultimate) utilize contactless Hall Effect sensors with permanent magnets. Because no parts physically touch, Hall Effect sticks are immune to mechanical wear and eliminate stick drift permanently.

Understanding Polling Rates (Hz) and Overclocking

The polling rate (measured in Hertz, Hz) dictates how frequently the controller microcontroller reports button states and stick coordinates to your PC:

125 Hz (8.0 ms latency): Standard default rate for Bluetooth Xbox controllers and legacy direct-input gamepads.
250 Hz (4.0 ms latency): Typical wired Xbox One / Series X report frequency.
1,000 Hz (1.0 ms latency): Native wired PlayStation DualSense or software-overclocked (LordOfMice hidusbf) controllers favored by competitive Call of Duty, Rocket League, and Apex Legends players for instantaneous responsiveness.

Gamepad Controller Specifications & Polling Rates Matrix

Reference guide comparing modern game controllers, sensor modules, report frequencies, and trigger architectures:

Controller Model	Default Polling Rate	Minimum Input Delay	Thumbstick Technology	Trigger Type
Sony DualSense (PS5)	1,000 Hz (Wired / USB)	1.0 ms	Potentiometer (Alps Alpine)	Adaptive Haptic Triggers
Xbox Wireless Controller	125 Hz - 250 Hz	4.0 - 8.0 ms	Potentiometer (Alps Alpine)	Impulse Magnetic Triggers
DualSense Edge	1,000 Hz (Wired)	1.0 ms	Modular Potentiometer	Mechanical Trigger Stops
Nintendo Switch Pro	100 Hz (Bluetooth)	10.0 ms	Potentiometer	Digital Click Buttons (No analog)
8BitDo Ultimate / Hall Effect	1,000 Hz (2.4GHz Dongle)	1.0 ms	Hall Effect (Magnetic)	Linear Hall Triggers

Frequently Asked Questions

How do I know if my controller has stick drift?

Let go of both thumbsticks and observe the circular radar on this page. If the position dot wanders outside the red center deadzone circle or reports a drift reading higher than 10% when completely untouched, your stick has physical drift.

Can stick drift be fixed without buying a new controller?

For minor drift caused by dust, spraying quick-drying electronic contact cleaner (like WD-40 Specialist Contact Cleaner) into the joystick housing can clear debris. In software, increasing your in-game deadzone from 5% to 12% will stop camera wandering. Permanent physical wear requires soldering new potentiometer wheels or upgrading to Hall Effect modules.

Does vibration test work on all browsers?

Controller vibration utilizes the standard vibrationActuator API, supported natively on Google Chrome, Microsoft Edge, Opera, and modern Chromium browsers over USB and official wireless adapters.

Is my controller input data private?

Yes, 100% private. All gamepad reading and radar calculations run entirely inside your device's local JavaScript memory. No button presses, joystick coordinates, or hardware identifiers are ever sent over the internet.