What is nanopi-openwrt?

Nanopi-openwrt is a project that provides pre-compiled OpenWrt router firmware for NanoPi single-board computers, including the R1S, R2S, R2C, R4S, and R1 Plus models, as well as x86 hardware. OpenWrt is a Linux-based operating system for routers that replaces the factory firmware, giving you full control over routing, firewall, and networking features. The project offers two variants. The slim build includes only the OpenWrt base system plus a local package repository containing most common add-ons, so you install only what you need through the package manager after booting. The full build comes with a large set of add-ons pre-installed. Both use the ext4 filesystem so the root partition can be expanded to fill the entire SD card after flashing. Flashing is straightforward: download a .img.gz file from the releases page, write it to an SD card using a flashing tool (the README recommends Etcher), insert the card, and power on. Once the board connects to the network, the router admin panel is accessible in a browser at http://immortalwrt/ without needing to find the IP address first. Default credentials are root / password. The local LAN address is 192.168.2.1. Online firmware upgrades can be done from the terminal with a single shell command. The project also supports USB wireless adapters using the RTL8821CU chip, which can operate in the 5GHz band. For users who want a customized build, the project includes a pre-compiled Image Builder. By forking the repository, editing a device-specific config file, and triggering a GitHub Actions workflow, you can produce a firmware image with exactly the packages you want in one to three minutes. The README is in Chinese.