Relay controller

100+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image
Screenshot image

About this app

Relay Controller lets you directly control your USB relay device via a cable connection. Additionally, you can pair a remote mobile device to allow wireless relay control.

Features:
Local control of USB relay devices
Optional remote control via secure pairing
Monitor and change relay states in real-time

Remote controll:
Control your USB relay board from anywhere.
Pairing is simple: just scan a QR code or enter a short access code.
The remote device doesn’t need to install anything — it works instantly in any modern web browser, including on iPhone, iPad, Android, PC, Mac, or tablet.
Updated on
Jan 9, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
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Committed to follow the Play Families Policy

What’s new

Add relay_connected event