error occurs at step 7 " recipe for target 'gen/ucode.bin' failed "

[wolke1526]

hi, I'm using asus ac86u router, when I follow the instruction to step 7 and run make install-firmware REMOTEADDR=<my router's ip> then I have this error PATCHING UCODE src/csi.ucode.bcm4366c0.10_10_122_20.patch => src/csi.ucode.bcm4366c0.10_10_122_20.asm ASSEMBLING UCODE src/csi.ucode.bcm4366c0.10_10_122_20.asm => gen/ucode.bin Makefile:218: recipe for target 'gen/ucode.bin' failed make: *** [gen/ucode.bin] Error 1 I've already ran source setup_env.sh and make before under sudo su, can I know how to fix this? Thanks in advance!

[zeroby0]

There should be log files in the folders nearby that will tell you what the error is in a more detailed manner.

You are also welcome to use my precompiled binaries and save time, or follow my build guide.

[wolke1526]

@zeroby0 Thank you for your advice! now I'm trying to use your precompiled package, but I have a problem and wonder if you can help me. when I try to send the package to my router, it seems the connection cannot be established and it keeps reporting connection timeout, but I already have turned the ssh enable on the router website. Do you have any advice? much thanks!

[zeroby0]

Are you connecting to your router wirelessly?

The wifi chip in router will be occupied in CSI collection and can't be used for anything else. So you have to use an Ethernet cable to connect to it.

[wolke1526]

Thank you for your reply! I'm connect the router with a LAN cable. but after then I try use a usb flash to transfer the file to the router, and it work! and I have managed to capture some packets now, the only thing is I have to login in to the router's terminal, I'm sorry to disturb you but do you have any idea that I can save the pcap file to PC? thanks again for your work!

[zeroby0]

Glad to hear that! Which operating system is your PC running?

Edit: It's probably not as fast as a flash drive, but you can use this: ssh admin@ROUTER_IP /jffs/tcpdump -ieth6 dst port 5500 -c2000 -vv -w- > csi.pcap. Credits to @DennisHerell , https://github.com/seemoo-lab/nexmon_csi/issues/213#issuecomment-842983736

[wolke1526]

@zeroby0 It's running xubuntu 18.4.03 as suggested. I still have some problems with ssh connection so now I'm using telnet ip to login, and I have a question, the ac86u is monitoring the wifi packet over the air, is that mean that I need to use another device like a phone to communicate with the AP while the ac86u is listening? my configuration is, an xubuntu desktop connected with ac86u by a Ethernet cable though LAN port, and ac86u is connected with an other router by Ethernet cable though WAN port. I'm wondering if I get the right CSI data?

[zeroby0]

What problems are you facing with SSH? Try pinging the ac86u and see if you have any packet drops. You can also use ssh -v to generate more debug info.

Yes, there should be some wireless traffic in the air to calculate CSI from.

I my configuration, I have a WiFi router connected to the Internet. Then I connect the WAN port of the ac86u to a LAN port on the WiFi router. Then I connect my laptop to the WiFi router via WiFi. Now I can SSH into the ac86u via the WiFi router. So the SSH connection going over WiFi also generates packets which the ac86u can collect CSI from.

[sri-abhinav]

Hi @zeroby0 @wolke1526, I am facing similar issues.

1. In step 7, after running make install-firmware REMOTEADDR=<address of your rt-ac86u> Makefile:221: recipe for target 'gen/ucode.bin' failed make: *** [gen/ucode.bin] Error 1

2. In step 10, after running scp nexutil admin@<address of your rt-ac86u>:/jffs/nexutil ssh: connect to host 192.XXX.XX.XX port 22: Connection refused lost connection

Could you please help me to fix this issue?

Thanks!

[zeroby0]

I can't be of much help without the log files :D

As for 2. ssh connection failed. Is the IP correct and is ssh enabled on the router?

There is also precompiled binaries linked above.