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inbox:toh:xiaomi:mi_wifi_range_extender_ac1200_model_ra75 [2022/08/19 16:07] – [Photos] jdeisenhinbox:toh:xiaomi:mi_wifi_range_extender_ac1200_model_ra75 [2024/05/01 20:03] – [Debricking] jdeisenh
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 ====== Xiaomi Mi WiFi Range Extender AC1200 Model RA75 ====== ====== Xiaomi Mi WiFi Range Extender AC1200 Model RA75 ======
-~~NOTOC~~ 
  
-/* This template is intended to be used via https://openwrt.org/meta/create_new_device_page */+{{:media:xiaomi:xiaomi-mi-wifi-range-extender-ac1200_small.jpg?200|RA75}}
  
-{{page>meta:infobox:construction&noheader&nofooter&noeditbtn}}+This is a compact, wall-wart type range extender with 2x2 Wifi5 dual band hardware. 20€ in 2022 in Germany, taxes included.  
 +Installation is done through an app, there is no HTML UI.  
 +If you don't mind some soldering, this is a very capable hardware for the price that runs OpenWrt just fine.  
 +Major hardware limitations (if you don't count the form factor's inherent lack of interfaces) are the 100Mbit LAN port and the 64MB of RAM. 
  
-This is compactwall-wart type range extender with 2x2 Wifi5 Dual band hardware20€ in 2022 in Germanytaxes included.  +Warning: There is a newer version on the marketModel RC04This looks identicalbut is quite a bit harder to install. Avoid
-Installation is done through an app, there is no HTML UI and no easy way to install OpenWRT yet.+
  
-/*****/ +===== Supported Versions ===== 
-/* How to add images ========> https://openwrt.org/meta/adding_images_to_openwrt_wiki */ +<!-- ToH{ 
-/*****/+  "source": "json", 
 +  "dom": "t", 
 +  "paging": false, 
 +  "rotate": true, 
 +  "shownColumns": ["brand", "model", "version", "supportedcurrentrel", "unsupported_functions", "forumsearch", "deviceid"], 
 +  "filterColumns": {"model": "RA75"
 +} -->
  
-{{:media:xiaomi:xiaomi-mi-wifi-range-extender-ac1200.jpg|RA75}}+Supported in snapshots, since 2023-01-14
  
-===== OpenWrt support ===== 
  
-This is almost the same hardware as [[:toh:xiaomi:mi_router_4a_mir4a_100m]] and it will run the firmware for this router. 
-Note: Chinese version, not the international one! 
- 
-Somewhat cleaner support is upcoming. 
 This box does not run a HTML UI, it is configured through an app. For this reason, you cannot use OpenWrtInvasion. This box does not run a HTML UI, it is configured through an app. For this reason, you cannot use OpenWrtInvasion.
 You have to install it by opening the box, soldering an UART connector, connect an UART 3V Interface, flash via shell and TFTP.  You have to install it by opening the box, soldering an UART connector, connect an UART 3V Interface, flash via shell and TFTP. 
  
-===== Supporting activities =====+This is almost the same hardware as [[:toh:xiaomi:mi_router_4a_mir4a_100m]] and can run its firmware, see notes at 'Alternative Firmware'.
  
-OpenWrt forum thread: https://forum.openwrt.org/t/almost-supported-xiaomi-ra75-aka-miwifi-range-extender-ac1200/134855+Please note that right now, there is no way back to the stock firmware(For lack of trying, and why would anybody?)
  
 +There seems to be a new version available from 2023 'Model RC04' with a different wifi chip. This is almost identical, but has a newer 5GHz Wifi chip. Unfortunately, console is not functional without directly modifying the SPI Flash's content with a flash programmer. You will also need to load a different chipset driver to get 5GHz functional. 
  
-===== Experimental firmware =====+** Supporting activities **
  
-Use the firmware from [[:toh:xiaomi:mi_router_4a_mir4a_100m]]+OpenWrt forum threadhttps://forum.openwrt.org/t/almost-supported-xiaomi-ra75-aka-miwifi-range-extender-ac1200/134855
  
 +===== Hardware Highlights =====
 +<!-- ToH: {
 +  "source": "json",
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 +  "paging": false,
 +  "rotate": true,
 +  "shownColumns": ["model", "version", "cpu", "cpumhz", "cpucores", "flashmb", "rammb", "wlanhardware", "wlan24ghz", "wlan50ghz", "ethernet100mports", "ethernet1gports", "usbports"],
 +  "filterColumns": {"model": "RA75"}
 +} -->
  
-===== Hardware highlights ===== +===== Installation ===== 
-^ CPU                  ^ Ram      ^ Flash    ^ Network  ^ WLAN                     ^ USB  ^ Serial  ^ JTag  ^ +<!-- ToH: { 
-| MT7628DAN @ 580 MHz   64 MiB  |  16 MiB  |  1x 100  |  b/g/n/ac 2x2 Dual band  |  no  |  Yes    |  ?    |+  "source": "json", 
 +  "dom": "t", 
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 +  "rotate": true, 
 +  "shownColumns": ["model", "version", "supportedcurrentrel", "firmwareopenwrtinstallurl", "firmwareopenwrtupgradeurl", "firmwareoemstockurl"], 
 +  "filterColumns": {"model": "RA75"
 +} --> 
 +** Alternative firmware **
  
 +If you must or want to run a pre-2022 release version, you can use the one for mi-router-4a-100m. 
 +Warning: (*not* mi-router-4a-100m-intl). 
  
-/*** if info available: uncomment and fill in +Buttons and LED definitions are wrong, and the LAN interface does not exist, the only ethernet is the WAN interface).  
-===== Installation ===== +It follows that you have to disable the firewall or adjust the network config from the serial console, otherwise the device will be inacessible
-  - → [[:downloads|Obtain firmware]] +
-  - → [[docs:guide-user:installation:generic.flashing|Install OpenWrt]] +
-  - → [[:downloads|Latest OpenWrt release]]+
  
 ==== Installing OpenWrt ==== ==== Installing OpenWrt ====
-***/+Only known way to install *right nowis the old school way of opening the box, soldering in a UART header, connecting to console.  
 +There is one screw under the barcode, right side. Header is standard. See FCC DB for photos. 
  
 +From there, its rather easy:
 +
 +After Boot, U-Boot will prompt for:
 +<webcode name="Default" frameborder=0 width=100% scrolling=yes externalResources="," renderingMode=story >
 +Please choose the operation: 
 +   1: Load system code to SDRAM via TFTP. 
 +   2: Load system code then write to Flash via TFTP. 
 +   3: Boot system code via Flash (default).
 +   4: Entr boot command line interface.
 +   9: Load Boot Loader code then write to Flash via TFTP. 
 +</webcode>
 +
 +With 2 (and having an tftp server running), you can flash the new firmware. 
 +Please note that the original firmware has not been yet extracted, so there is no way back!
  
-/*** if info available: uncomment and fill in 
 ===== Debricking ===== ===== Debricking =====
 -> [[docs:guide-user:troubleshooting:generic.debrick]] -> [[docs:guide-user:troubleshooting:generic.debrick]]
-***/+ 
 +The standard method of debricking common to xiaomi devices work: Hold the reset button while booting to get into a mode where the device will request a signed bootloader via TFTP. But there is currently no known source for an installable stock firmware.  
  
  
-/*** if info available: uncomment and fill in 
 ===== Failsafe mode ===== ===== Failsafe mode =====
 -> [[docs:guide-user:troubleshooting:failsafe_and_factory_reset]] -> [[docs:guide-user:troubleshooting:failsafe_and_factory_reset]]
-***/+ 
 +Use the hidden reset button near the ethernet connector for failsafe mode, when the led starts blinking fast. The big WPS button on the front doesn't do anything at this stage.
  
  
-/*** if info available: uncomment and fill in 
 ===== Basic configuration ===== ===== Basic configuration =====
 After flashing, proceed with [[docs:guide-user:base-system:start|Basic configuration]]: Set up your Internet connection, configure wireless, configure USB port, etc. After flashing, proceed with [[docs:guide-user:base-system:start|Basic configuration]]: Set up your Internet connection, configure wireless, configure USB port, etc.
-***/ 
- 
  
 /*** if info available: uncomment and fill in /*** if info available: uncomment and fill in
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 ^ Vendor          | Ralink                                  | ^ Vendor          | Ralink                                  |
 ^ Bootloader      | U-Boot                                  | ^ Bootloader      | U-Boot                                  |
-^ System-On-Chip  | Mediatek MT7628DAN - MIPS 24K V4.12     |+^ System-On-Chip  | Mediatek MT7628DAN - MIPS 24KEc V5.    |
 ^ CPU/Speed       | 580                                     | ^ CPU/Speed       | 580                                     |
 ^ Flash-Chip      | W25Q128BV                               | ^ Flash-Chip      | W25Q128BV                               |
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 ^ RAM             | 64MB                                    | ^ RAM             | 64MB                                    |
 ^ Wireless        | 2x2 Wifi5 Dual Band, MT7628DAN+ MT7612  | ^ Wireless        | 2x2 Wifi5 Dual Band, MT7628DAN+ MT7612  |
-^ Ethernet        | 100 Mbit/                             |+^ Ethernet        | 1 Port, 100 Mbit/                     |
 ^ Switch          | builtin                                 | ^ Switch          | builtin                                 |
 ^ USB             | none                                    | ^ USB             | none                                    |
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-There is a single screw under the barcode label, right side. Removing the screw beneath, you can split the unit into the power supply and the wifi part.+There is a single screw under the barcode label, right side. Removing the screw beneath, you can split the unit into the power supply and the wifi part. The 'hot' parts are shielded, no risk of electrical shock
  
 +{{:media:xiaomi:ra75_open.jpg|RA75}}
 ==== Serial ==== ==== Serial ====
 -> [[docs:techref:hardware:port.serial]] general information about the serial port, serial port cable, etc. -> [[docs:techref:hardware:port.serial]] general information about the serial port, serial port cable, etc.
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 ===== Tags ===== ===== Tags =====
-[[meta:tags|How to add tags]] +{{tag>MIPS ramips mt7628an 16Flash 64RAM 1port fastethernet wlan 802.11abgn 802.11a 802.11bgn 802.11ac wall_plug 1button mains_powered Serial U-Boot}}
-{{tag>EXAMPLETAG unsupported}}+
  • Last modified: 2024/11/05 17:55
  • by griba