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NRadio C8-668GL is a Wi-Fi 6 5G cellular router based on MediaTek MT7981B SoC. - **SoC**: MediaTek MT7981B (2x Cortex-A53, 1.3GHz) - **RAM**: Nanya NT5AD512M16C4-JR 1GB DDR4 - **Flash**: ESMT FC51L08SFY3A 8GB eMMC - **Ethernet**: - 1x 2.5GbE (via GMAC0 and GPY211 PHY, shared with MT7531AE) - 3x 10/100/1000 Mbps (via MT7531AE, connected to GMAC0) - 5G Modem: GMAC1 (via GPY211 PHY - RTL8125BG - RM520N-GL) - **Wi-Fi**: MediaTek MT7976CN (2.4GHz/5GHz, 802.11ax, 2x2 MIMO, AX3000) - **Buttons**: Reset, WPS - **LEDs**: Power, 5G, 4G, WiFi - **SIM Slot**: 1x Nano SIM - **5G Modem**: Quectel RM520N-GL (Snapdragon™ X62) - **Power**: 12V/2A DC, 5.5×2.1 connector The MAC addresses are derived from the `fac_mac` field in the `bdinfo` partition, formatted as `fac_mac = HWMAC`. The allocation is as follows: | Vendor | OpenWrt Interface | Address | Notes | |---------|-------------------|---------------|------------------------------------------------| | LAN | br-lan | Label MAC | Default | | WAN | lan4 | Label MAC+1 | Only when lan4 is switched to WAN | | 2.4GHz | phy0-ap0 | Label MAC | | | 5GHz | phy1-ap0 | Label MAC | (Local Admin bit set) | | Modem | eth1 | Label MAC+2 | | 1. Log in to the router via `http://192.168.66.1`/. 2. Upgrade the official firmware to dual-system mode. 3. Select **Burn second system** and upload the `sysupgrade.bin` image. - Download the image from the OpenWrt build system or build it yourself using the OpenWrt buildroot. 4. Wait for 30 seconds and click **Switch system**. 5. The device will reboot and switch to OpenWrt. Set the U-Boot environment variable `boot_system=0` and reboot: ```bash fw_setenv boot_system 0 ``` Power off the router, hold the **WPS button**, and power it back on. 1. Rename the stock firmware file to **`recovery.bin`**. 2. Set your PC's Ethernet IP to **192.168.1.88** and connect it to the lan1 port on the router. 3. Run a TFTP server and place the `recovery.bin` file in its root directory. 4. Power off the router, press and hold the **Reset button**, and power it back on. 5. Release the Reset button when the TFTP server shows activity. 6. Wait for the router to flash the firmware and reboot automatically. - By default, `lan4` is part of `br-lan` and uses the label MAC address. - To query the RM520N-GL module, use the following command: ```bash cat /dev/ttyUSB2 & printf 'ATI\r\n' > /dev/ttyUSB2 ``` Signed-off-by: Yaoguang Bai <0xdeadc0de@badguys.club> Link: https://github.com/openwrt/openwrt/pull/17093 Signed-off-by: John Crispin <john@phrozen.org> |
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