Product Overview
FriendlyElec NanoPi R4S is a compact open-source mini router and single board computer powered by the Rockchip RK3399 hexa-core SoC, built for IoT gateways, NAS applications, and smart home hubs. Its dual Gigabit Ethernet ports, 4GB LPDDR4 RAM, and native OpenWrt support deliver enterprise-grade wired networking in a palm-sized 66x66mm form factor with silent passive cooling.
Key Specifications
SoC: Rockchip RK3399, 6-Core (2x Cortex-A72 up to 2.0GHz + 4x Cortex-A53 up to 1.5GHz)
GPU: Mali-T864 with OpenGL ES 3.1, OpenCL, DX11, 4K VP9/H.265/H.264 60fps decode
RAM: 4GB LPDDR4
Storage: MicroSD slot (up to 128GB), no onboard eMMC
Ethernet: 1x Native Gigabit + 1x PCIe Gigabit, up to 941 Mbps throughput per port
USB: 2x USB 3.0 Type-A, 1x USB 2.0 (4-pin header), 1x USB-C (power input only)
Expansion: 10-pin GPIO header (SPI, I2C), Debug UART (3-pin, 3V, 1500000bps)
Other: RTC battery connector, 5V fan header, user button, 4x status LEDs
Cooling: Passive heatsink design, optional CNC aluminum case for enhanced dissipation
Power: 5V/3A via USB-C (USB PD not supported), RK808-D PMIC with DVFS
Board Size: 66 x 66mm, 40.9g (310g with metal case, 72x72x29mm with case)
Operating Temp: -20C to 70C
Applications & Use Cases
Deploy as an OpenWrt-powered secure VPN gateway, Pi-hole network-wide ad blocker, lightweight NAS with USB 3.0 storage expansion, container host for home automation services, or edge computing node for IoT sensor aggregation. Ideal for networking enthusiasts, IT professionals, and developers who need a versatile, energy-efficient wired routing platform that stays cool under sustained load.