Raspberry Pi Foundation Raspberry Pi 4: OpenWrt Compatibility Report
The Raspberry Pi Foundation Raspberry Pi 4 runs OpenWrt 25.12.5 on the bcm27xx/bcm2711 target, and has been supported since 21.02.0. Its WiFi 5 (AC) wireless on the brcmfmac driver rates limited for open-source driver support (0.40/1.0), installation is rated moderate, and it is still sold new.
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Specifications
| SoC | Broadcom BCM2711 |
|---|---|
| CPU | 4 cores @ 1500 MHz |
| RAM | 2048 MB |
| Ethernet ports | 1 |
| USB | 2x 2.0, 2x 3.0, 1x OTG |
| WiFi generation | WiFi 5 (AC) |
| Radios | 2.4GHz: b/g/n · 5GHz: a/n/ac |
| WLAN hardware | Cypress CYW43455 |
| WLAN driver | brcmfmac |
| OpenWrt target | bcm27xx / bcm2711 |
| Package architecture | aarch64_cortex-a72 |
| Current release | 25.12.5 |
| Supported since | 21.02.0 |
| Install method | SD card |
| Install difficulty | moderate |
| Power supply | 5 VDC, 3.0A via USB Type-C |
| Device type | Access point |
| Estimated throughput | 1000 Mbps |
| Availability | available |
Installing OpenWrt on the Raspberry Pi 4
Installation on this device is rated moderate. Expect to use a recovery mode, TFTP or a vendor tool rather than a plain web upload. Documented methods: SD card.
Official OpenWrt device page for the Raspberry Pi 4
Flashing third-party firmware can brick a router and usually voids the warranty. Always check that the firmware image matches your exact hardware version.
Hardware versions
The Raspberry Pi 4 ships in several hardware revisions with different chipsets. Match the version printed on your device label before flashing.
| Version | Target | Current release | WLAN hardware |
|---|---|---|---|
| B shown above | bcm27xx/bcm2711 | 25.12.5 | Cypress CYW43455 |
| raspberry_pi_foundation_raspberry_pi_cm4 | bcm27xx/bcm2711 | 25.12.0 | Cypress CYW43456 |
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