: Theoretical 150 Mbps (real-world performance typically ranges from 60–90 Mbps). Frequency Band : 2.4 GHz only (no 5 GHz support).
Realtek RTL8188CU Wireless LAN 802.11n USB 2.0 Network Adapter: A Comprehensive Guide The
If you are on modern Linux (Ubuntu 22.04+, Fedora 36+), the kernel has removed the staging driver for this chip. You need a maintained driver.
The is a widely used, ultra-compact Wi-Fi dongle. It adds wireless connectivity to desktop computers, legacy laptops, and single-board computers like the Raspberry Pi. Despite its age, this hardware remains relevant for specific budget-friendly projects and older operating systems. You need a maintained driver
If the default driver causes drops, developers on GitHub host community-maintained versions (such as the puresilva or lwfinger repositories) that offer better stability on newer Linux kernels.
Right-click your Realtek or "Unknown" USB device and click .
: If Secure Boot is enabled on your system (common on newer computers), you will need to sign the driver, or it won't load. The installation process can guide you. Despite its age, this hardware remains relevant for
Extract the downloaded .zip or .cab file to a dedicated folder on your desktop. Right-click the and select Device Manager . Expand the Network adapters section.
Windows tips
For users who prefer to obtain drivers directly from Microsoft’s official repository, the offers a convenient option. The catalog lists a driver package for the Realtek RTL8188CU Wireless LAN 802.11n USB 2.0 Network Adapter with the following details: the offers a convenient option.
Uncheck the box stating .
Realtek RTL8188CU is a legacy 2.4GHz single-band wireless LAN controller commonly found in compact USB 2.0 dongles for desktops, older laptops, and media boxes. It is designed for basic Wi-Fi connectivity where cost and wide compatibility are more important than high-speed performance. Alibaba.com Key Specifications : USB 2.0 (compatible with USB 1.1). : IEEE 802.11b, 802.11g, and 802.11n.
The RTL8188CU is famous for dropping connections on Linux. Do not use the default rtl8192cu driver that comes with the kernel—it is broken.