K3 Smart IoT Motherboard

Overview

The K3 Smart IoT Motherboard delivers high-performance computing for vending machines and smart retail applications, powered by the Rockchip RK3288 quad-core Cortex-A17 processor running at up to 1.8GHz — the highest clock speed in the K-series lineup. The integrated Mali-T764 GPU supports OpenGL ES 3.1 and provides 4K hardware video decoding, enabling stunning ultra-HD display output for premium vending experiences. What sets the K3 apart is its exceptional interface density — featuring 8× configurable serial ports (2 TTL/RS-232/RS-485, 2 TTL/RS-232, and 4 SPI-expanded TTL/RS-232), HDMI input for video capture, multiple display interfaces (LVDS, MIPI-DSI, HDMI 2.0 4K, and eDP), and Bluetooth 5.2 support. With 2GB DDR3 (4GB optional), 16GB eMMC (expandable to 128GB), 9V–15V wide voltage input, -20°C to 70°C wide-temperature operation, and multi-OS support (Android 5.1/6.0/7.1/8.1 and Linux), the K3 delivers the performance, connectivity, and flexibility needed for advanced vending and retail solutions.

Key Advantages

• 8× Configurable Serial Ports — Unmatched Peripheral Connectivity: 2× TTL/RS-232/RS-485 + 2× TTL/RS-232 + 4× SPI-expanded TTL/RS-232 — connect payment terminals, barcode scanners, sensors, and controllers simultaneously. More serial ports than any other K-series board, with flexible configuration for diverse peripheral requirements.

• 1.8GHz Processing Power: The RK3288's 1.8GHz clock speed delivers noticeably faster UI responsiveness and application performance — smoother animations, quicker transactions, and better multitasking for feature-rich vending applications.

• 4K Display with HDMI Input: HDMI 2.0 output supports 4K resolution for stunning promotional content, while HDMI 1.4 input enables real-time security camera display — combining high-impact advertising with theft deterrence on a single screen.

• Multi-OS Flexibility: Supports Android 5.1/6.0/7.1/8.1 and Linux (Buildroot/Debian 9/Ubuntu 18.04) — choose the platform that best fits your application, development team, and long-term maintenance strategy.

• Bluetooth 5.2 Support: Built-in BT 5.2 delivers faster data transfer, longer range, and improved power efficiency — enabling wireless peripheral connectivity, mobile app integration, and remote diagnostics.

• Wide-Temperature Reliability: -20°C to 70°C operating temperature range — stable performance in outdoor vending machines, cold chain applications, and harsh environments.

Why Choose This Board?

• The Serial Port King for Complex Vending Systems: Vending machines are becoming more complex — payment terminals, barcode scanners, inventory sensors, and diagnostic tools all need serial connections. The K3's 8× configurable serial ports handle them all without multiplexing or external adapters. Simplify your design, reduce BOM complexity, and support future expansions with one board.

• Proven Performance at the Right Price: The RK3288 is one of the most widely deployed processors in vending and retail applications — battle-tested, stable, and well-supported. With 8 serial ports, 4K display, and HDMI input at this price point, the K3 delivers unmatched value without compromising on features or reliability.

• 4K + HDMI Input — The Complete Visual Solution: Run stunning 4K promotional content to attract customers, while simultaneously displaying live security camera feeds on the same screen. No external video switchers, no additional components — the K3 handles it all, making your vending machine more secure and more visually compelling.

• One OS for the Entire K-Series: Android 7.1 is the common platform across all K-series boards, with Android 5.1/6.0/8.1 and Linux options for specific requirements. Standardize on the K3 for premium vending machines and K0/K2 for entry-level models — use the same software base across the entire product line, reducing development costs and simplifying maintenance.

• Bluetooth 5.2 for Modern Connectivity: Connect wireless payment terminals, smartphone-enabled interfaces, and diagnostic tools. Longer range and lower power consumption make BT 5.2 ideal for vending machines in public spaces — enabling new customer engagement features like mobile payments and loyalty programs.

• Delivery & Packaging

  Item	Details
  Packaging	Anti-static bag + foam padding + industrial carton
  MOQ	1 piece (sample order), 100+ for volume pricing
  Lead Time	3–5 working days for samples; 15–20 working days for bulk orders
  Shipping	DHL, FedEx, UPS, or by sea (customer's choice)