Cf-ew72 Firmware

[Badomero Schoulund]

Theoriginal firmware is based on OpenWrt so a sysupgrade image can be installed via the stock web GUI. Settings from the original firmware will be saved and restored on the new one, so a factory reset using the devices' reset button will be needed.

There are probably some hints in the old dev thread. You should read that and see if you can continue the work where it stopped. Supporting new MT7621 devices is pretty easy in general, but there are always some device specific stuff to figure out. Like GPIOs for buttons/LEDs. Or vendor specfici boot loader extensions like dual partition etc.

Make sure you can access the boot loader, stopping boot and interacting with it. Try to load and boot an initramfs from RAM. Either one you've prepared for that router, or just try some other MT7621 image to start exploring the hardware. Be careful not to do any unintentional flash writes.

-developer/adding_new_device lists the tasks you have to do. Start doing what it says on top: Look at recent commits adding new devices, in particular new MT7621 devices.You can find them by e.g doing

Creating the DTS is the most important part, since it describes all the hardware including the flash layout. Find a similar device to use as a template. The closer it matches, the less work you'll have to do.

Quick image building guide See also: Using the toolchain, Using the Image Builder The goal of this guide is to let you build your own flashable firmware in as few simple steps as possible. The main advantage of building your own firmware is that it...

Hello everyone.

So I recently purchased a few Comfast CF-EW72 access points followed the wiki guide and bricked the firmware after a while of trying to figure out what was going on, someone pointed out they were running off the Mediatek SOC not the usual Qualcomm.

I'm not sure where to go from here. I've messaged Comfast to try get some info as all their specifications they publish show the Qualcomm chip so either they recently changed or I've managed to get a bunch of counterfeit access points.

Any help would be greatly appreciated, If anyone can help and need more details please let me know.

Many thanks Bowen.

The FCC ID on the label should provide you with some answers, the ID must match the innards and should show the PCB and relevant components (yes, the images are often blurry and bad, but still a first hint).

They don't match! So where do I stand? The FCC listing only shows the Qualcomm board, seems this Mediatek variant isn't listed I'll wait for Comfast to reply and confirm but it looks very much like someone is doing something naughty either it's counterfeit or Comfast has changed the products and not notified the FCC.

So as I have nothing to loose at this point I went ahead and flashed some generic Mediatek mt7621 firmware I found on the openwrt site. It boots I have 18.06 running on the device but no WiFi drivers.

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Seems most of the chips have heatsinks plastered to them which it seems I might have to remove to figure out what drivers to use. If your lucky you might get one with the Qualcomm chip but if you don't and end up with the Mediatek like I did let me know and I'll send you anything I come up with.

Will the kernel log tell me anything considering ive flashed another kernel onto the device? Sorry I'm an idiot I don't tend to learn anything untill I break it this is the 2nd one of these I've had in so many weeks the first one I killed uboot on so I'll have to use a eeprom programmer to fix it.

Ok great! thanks! I'll get it an IP set up and install lspci, fingers crossed I should start getting somewhere. Damn things have been stressing me out! Even not working but having firmware I can boot has calmed me down alot.

Seems this is as new as I can go if I try to load a 21.xx image of OpenWRT it gets stuck in a boot loop. Not totally sure what to do at this point. I don't want to start working on the modules if they are indeed counterfeit and I should be sending them back not working hard to fix them. I'll wait to hear back of Comfast and see what they say about the fact these are Mediatek units.

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It claims it's version 2 but I've been through all the FCC listings and there's no version 2 I'm still waiting to hear back from Comfast I even sent an email to the general manager but no one wants to reply and the seller I got them from is claiming there's 2 versions but Comfast only lists one firmware. it's all a massive pita.

Carefully read the Additional Information field (2) that contains additional information on firmware installation. In our example, this field indicates that Standard Generic firmware (5) cannot be directly installed since the Mini Generic version (4) must installed first and then updated to the Standard Generic version.

In this case, download both firmware versions (Standard Generic and Mini Generic). In other cases, you are prompted to first install a version called "factory" or "Web flash for first installation".

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