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Netgear RBx750 are tri band, 2.4GHz and 2x 5GHz, 8 stream 802.11ax mesh devices from the Orbi series. The RBR750 is a router with a WAN and 3 LAN ports. The RBS750 is a satellite without WAN port, only 2 LAN ports and half the flash. The hardware is otherwise identical. They were sold in kits as RBK752-RBK757, with one router and 1-6 satellites. Hardware: * SoC: Qualcomm IPQ8074 * RAM: 1GiB 1x Samsung * Flash: 512MiB Winbond W29N04GZ or 256MiB Winbond W29N02GZ * WLAN 2.4GHz: QCN5024 2x2:2 b/g/n/ax * WLAN 5GHz Low Band: QCN5054 2x2:2 a/n/ac/ax 5180-5320MHz * WLAN 5GHz High Band: QCN5054 4x4:4 a/n/ac/ax 5500-5700MHz * Ethernet: QCA8075 switch with 1 WAN and 3 LAN ports or 2 LAN ports * Serial Config: 3.3V TTL 115200-8-N-1, internal populated header * Serial Layout: Bottom <- RX, TX, GND, 3.3V (don't connect) -> Top * LEDs: green/red power, white/red/green/blue status * Buttons: 1x Reset, 1x WPS MAC addresses: LAN1: base address on label LAN2: base + 1 LAN3: base + 2 WAN: base + 1 2.4GHz: base + 2 5GHz-Low: base + 3 5GHz-High: base + 4 Flashing Notes: The stock firmware images are signed. Both the bootloader and the stock web interface check the signature and will fail to boot/flash. The bootloader automatically does NMRP when a gigabit LAN connection is present. The stock and factory images contain a U-Boot script that is executed when flashing using NMRP. This is used to alter and persist the U-Boot env with a boot command that works with unsigned firmware. Install OpenWrt: * Get the nmrpflash utility [0] and OpenWrt factory image * Find network interface to use: nmrpflash -L * Start nmrpflash: nmrpflash -i interface -f openwrt-...-factory.img * Connect the device LAN port closest to the power jack to the same network using gigabit * Plug the device in and wait for the bootloader to flash * Unplug and replug the device once the power LED blinks amber Revert to Stock: The boot command needs to be reverted before flashing the stock firmware, otherwise it will fail to boot and get stuck in recovery mode (red power LED flashing). * Run: fw_setenv bootcmd bootipq * Restart the device * Flash the stock firmware RBx750-Va.b.c.d.img using nmrpflash [0]: https://github.com/jclehner/nmrpflash Signed-off-by: Michael Lotz <mmlr@mlotz.ch> Link: https://github.com/openwrt/openwrt/pull/21938 Signed-off-by: Robert Marko <robimarko@gmail.com> |
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