# NO UHD devices found for E100 **URL:** \ **Category:** GNU Radio\ **Created:** [June 25, 2015, 8:26am UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-for-e100/242460 "2015-06-25T08:26:24Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Post date:** [June 25, 2015, 8:26am UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-for-e100/242460/1 "2015-06-25T08:26:24Z")
(This message was also posted on USRP-users mailing list.) I am trying to connect USRP E100 to my PC, ubuntu 14.04 But I am having a difficulty on finding uhd device. The followings what I have done til now: ``` $ sudo ethtool eth0 # check if ethernet is gigabit Settings for eth0: Supported ports: [TP MII] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Supported pause frame use: Symmetric Receive-only Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Advertised pause frame use: Symmetric Receive-only Advertised auto-negotiation: Yes Speed: 100Mb/s Duplex: Full Port: MII PHYAD: 1 Transceiver: external Auto-negotiation: on Supports Wake-on: g Wake-on: g Current message level: 0x000000ff (255) drv probe link timer ifdown ifup rx_err tx_err Link detected: yes $ ifconfig # check if PC and E100 is in a network eth0 Link encap:Ethernet HWaddr 00:25:64:c2:16:be inet addr:192.168.10.1 Bcast:192.168.10.255 ``` Mask:255.255.255.0 inet6 addr: fe80::225:64ff:fec2:16be/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:251 errors:0 dropped:0 overruns:0 frame:0 TX packets:1943 errors:4 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:254997 (254.9 KB) TX bytes:193482 (193.4 KB) Interrupt:16 ``` lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:839 errors:0 dropped:0 overruns:0 frame:0 TX packets:839 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:66205 (66.2 KB) TX bytes:66205 (66.2 KB) $ uhd_find_devices # check if there is USRP connected linux; GNU C++ version 4.8.2; Boost_105400; ``` UHD\_003.009.git-189-g6b64d9bb ``` NO UHD Devices Found ``` Could you suggest anything else what I haven’t done yet? I use Cat 5 ethernet cable to connect USRP and PC (not sure it is 5e, I’ll check it.) Regards, Jeon. ---
**Author:** ![Jeon](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e8c25b/32.png) [@Jeon](https://www.ruby-forum.com/u/Jeon)\ **Post date:** [June 25, 2015, 8:34am UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-for-e100/242460/2 "2015-06-25T08:34:35Z")
Hi Jeon, > (This message was also posted on USRP-users mailing list.) > Ah! While I was writing my answer for that, this email came in. > Point is the same, gr-uhd on your PC can’t detect the E100 because it’s > not a peripheral (like e.g. the N200), but an embedded linux computer of > its own. What I didn’t know in my reply was that you were planning to use GNU Radio. The good thing is: GNU Radio python flow graphs are perfectly portable, so if you have a GNU Radio application that doesn’t need any custom C++ blocks, you can get away without cross-compiling software on your PC for the E100, but will just have to copy over the python files to your E100. Best regards, Marcus ---
**Author:** ![Jeon](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e8c25b/32.png) [@Jeon](https://www.ruby-forum.com/u/Jeon)\ **Post date:** [June 26, 2015, 2:45am UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-for-e100/242460/3 "2015-06-26T02:45:51Z")
Hi Jeon, > In my case, my OOT module use IT++ (for convolutional code) and > [ezpwd-reed-solomon](https://github.com/pjkundert/ezpwd-reed-solomon) > Isn’t it the case that I can port it easily? > Since the E100 runs a “normal” linux, yes, it should be relatively easy. > And is there no way to use E100 as a peripheral? But only to use it as > an embedded machine? > No, no way. You can of course use something like a network sink in GNU > Radio, but that won’t be fun (100Mbit/s means even for 8 bit samples > 5MS/s max, and that’s more than the CPU on the E100 can feed from the > Radio to the network). > Then, I have to consider using USRP 1 or N200. I have both 🙂 > Use the N200. It’s the right device for that job! Best regards, Marcus ---
**Author:** ![Jeon](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e8c25b/32.png) [@Jeon](https://www.ruby-forum.com/u/Jeon)\ **Post date:** [June 26, 2015, 6:33am UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-for-e100/242460/4 "2015-06-26T06:33:06Z")
Thanks Marcus 🙂 2015-06-25 16:42 GMT+09:00 Marcus Müller [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): ---
**Author:** ![hiran](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/53a042/32.png) [@hiran](https://www.ruby-forum.com/u/hiran)\ **Post date:** [November 23, 2022, 11:49am UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-for-e100/242460/5 "2022-11-23T11:49:01Z")
hello, I have recently got my hands on an old usrp (e100). I cant find much about it looking online .So far I have two questions. > What does the three usb ports do? (usb ports are -console,otg and host) > how to install usrp e100 drivers and configure e100 in gnu radio.