Linux Compatibility Verified: 3.5" USB Dynamic QR Display (BEI-CFD-001-USB)
✅ Successfully tested on Linux: USB driver compatibility + browser-based web app commands. Dynamic QR, payment screens & billing software integration — ready for cross-platform deployment.
🔌🖥️ Going above and beyond for seamless compatibility and performance, our team has recently completed extensive testing on our "3.5 inch USB Dynamic QR Code Display" (Model: BEI-CFD-001-USB) on a Linux machine. Our focus was on examining:
- 🔧 USB Driver Compatibility: Verified plug-and-play operation with standard Linux USB-Serial (CDC) drivers — no custom driver installation required
- 🌐 Browser-Based Web App Commands: Successfully sent QR code display and other commands directly from a browser-based web application using Web Serial API
✅ Successfully Tested Commands
We successfully tested a variety of commands to ensure smooth and efficient display:
- 🎉 Welcome Screen: Branded greeting for customers
- 💰 Bill Total Screen: Clear display of amount due
- 📱 Dynamic QR Code Payment Screen: Amount-specific QR code for instant BHIM UPI scanning
- ✅❌ Payment Status Screens: Success / Fail / Cancel / Notification alerts
📌 Device Overview
Our 3.5-inch USB Dynamic QR Display is designed as a customer-facing device for dynamic QR Code Payments, a perfect tool for BHIM UPI Payment Collection at retail stores.
🔎 Technical Specifications
| Specification | Detail |
|---|---|
| Display Screen Size | 3.5 inch Color TFT LCD |
| Resolution | 320 × 480 Pixels — optimized for QR scanning clarity |
| Connectivity | USB Powered — No Battery — USB Type B Connector |
| Compatibility | ✅ Android Handset | ✅ Windows Desktop | ✅ Linux (Tested & Verified) |
| BHIM UPI Compatible | Yes — works with Paytm, PhonePe, GPay, BharatPe & all bank QR apps |
| Item Code | BEI-CFD-001-USB |
| Manufacturer | Bonrix Embedded Innovations, Ahmedabad, Gujarat, India 🇮🇳 |
💡 Usage & Integration
- 🔄 Dynamic QR CODE with Amount: Displays exact payment amount for each new order — eliminates manual entry errors
- 🔗 Easy Billing Software Integration: Integrate with any billing software using USB serial port commands (text-based protocol)
- 🌐 Browser-Based Control: Use Web Serial API to send commands directly from Chrome/Edge browser on Linux
- ⚡ Plug-and-Play: No driver installation needed on Linux — uses standard CDC-ACM USB-Serial driver
🐧 Linux Integration Example (Web Serial API)
// Request USB device access
const port = await navigator.serial.requestPort();
// Open port with correct baud rate
await port.open({ baudRate: 115200 });
// Send command to display Welcome Screen
const writer = port.writable.getWriter();
await writer.write(new TextEncoder().encode("CMD:WELCOME:Welcome to Store\n"));
writer.releaseLock();
// Send dynamic QR code
await writer.write(new TextEncoder().encode(
"CMD:QR:upi://pay?pa=merchant@upi&pn=Store&am=299.00\n"
));
🎯 Ideal Applications
- 🏪 Retail Stores & Kirana Shops: Customer-facing billing + dynamic QR UPI collection on Linux POS
- ☕ Cafes & QSRs: Order confirmation + instant payment via Linux-based billing systems
- 💊 Pharmacies & Clinics: Contactless payments with clear transaction visibility on Linux terminals
- 🖥️ Linux POS Deployments: Ideal for businesses using Ubuntu, Debian, Raspberry Pi OS, or other Linux distributions
✨ Why Linux Compatibility Matters
- ✅ Cost-Effective: Leverage open-source Linux POS systems without proprietary hardware lock-in
- ✅ Secure & Stable: Linux's robust security model ensures reliable payment processing
- ✅ Flexible Deployment: Run on Raspberry Pi, thin clients, or full Linux desktops
- ✅ Future-Proof: Web Serial API support ensures compatibility with modern browsers
- ✅ Made in India: Engineered in Ahmedabad with global standards and local support 🇮🇳
🔗 Connect With Us
For more information about this innovative device, or to get in touch with us, check the contact details below ⬇️
📘 Facebook:
/bonrixembeddedinnovations
🌐 Website:
www.embedded-innovations.com
✉️ Email:
info@embedded-innovations.com
📞 Phone:
+91 94097 45500 /
+91 94290 45500
💬 WhatsApp:
Chat with Us
Join us at Bonrix Embedded Innovations in Ahmedabad, Gujarat, INDIA. Let's redefine the future of retail payments together! 💼💼🚀
