# USRP N210 - No device found **URL:** \ **Category:** GNU Radio\ **Created:** [August 29, 2014, 3:28am UTC](https://www.ruby-forum.com/t/usrp-n210-no-device-found/231767 "2014-08-29T03:28:17Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Post date:** [August 29, 2014, 3:28am UTC](https://www.ruby-forum.com/t/usrp-n210-no-device-found/231767/1 "2014-08-29T03:28:17Z")
Hello everyone, ## I am using USRP for the first time. I am trying to replicate the FM Receiver found on Ettus’ YouTube channel named as: “How To Build an FM Receiver with the USRP in Less Than 10 Minutes”. The .grc flow is generated ok, but when I execute the flow graph I get the message: ## RuntimeError: LookupError: KeyError: No devices found for -----\> Device Address: addr: 192.168.10.2 ## At the beginning I just connected the USRP to the laptop, the Ethernet was set as address 192.168.10.2 (mask 255.255.255.0 and gateway 0.0.0.0) and I left blank the “Device Address” on the “UHD: USRP Source” and I got the message: ## RuntimeError: LookupError: KeyError: No devices found for -----\> Empty Device Address I checked that my laptop is able to ping the device using ping 192.168.10.2 on the terminal. Then I changed the “Device Address” to “addr=192.168.10.2” and got the message showed at the beggining * * * ## RuntimeError: LookupError: KeyError: No devices found for -----\> Device Address: addr: 192.168.10.2 As my laptop is able to connect to the USRP I guess the problems comes from how I set the “UHD: USRP Source” block or the GNU Radio itself. I am working on Ubuntu 14.04 (installed it today) and GNU Radio Companion 3.7.2.1. Am I missing something?. Thanks in advance for your help. – View this message in context: [http://gnuradio.4.n7.nabble.com/USRP-N210-No-device-found-tp50151.html](http://gnuradio.4.n7.nabble.com/USRP-N210-No-device-found-tp50151.html) Sent from the GnuRadio mailing list archive at [Nabble.com](http://Nabble.com). ---
**Author:** ![haroldmk](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/5fc32e/32.png) [@haroldmk](https://www.ruby-forum.com/u/haroldmk)\ **Post date:** [August 29, 2014, 4:17am UTC](https://www.ruby-forum.com/t/usrp-n210-no-device-found/231767/2 "2014-08-29T04:17:31Z")
Hello Harold: Make sure that UHD can see the USRP. Try running “uhd\_usrp\_probe” with no command-line arguments. Do you have a firewall running on your system? You can check with “sudo iptables -L”. If you are running one, then try shutting it down, and re-running your flowgraph. You can safely shut down your firewall with the following commands: sudo iptables -P INPUT ACCEPT sudo iptables -P OUTPUT ACCEPT sudo iptables -F –Neel ---
**Author:** ![haroldmk](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/5fc32e/32.png) [@haroldmk](https://www.ruby-forum.com/u/haroldmk)\ **Post date:** [August 31, 2014, 1:46am UTC](https://www.ruby-forum.com/t/usrp-n210-no-device-found/231767/3 "2014-08-31T01:46:50Z")
Hello everyone The problem was that the IP address set for the PC (192.168.10.2) was the same as the USRP, so the communication was not possible. I set the PC address as 192.168.10.1 and it worked properly (255.255.255.0 mask). Thanks to Neel and Marcus for their valuable help. – View this message in context: [http://gnuradio.4.n7.nabble.com/USRP-N210-No-device-found-tp50151p50161.html](http://gnuradio.4.n7.nabble.com/USRP-N210-No-device-found-tp50151p50161.html) Sent from the GnuRadio mailing list archive at [Nabble.com](http://Nabble.com). ---
**Author:** ![sadiq123](https://www.ruby-forum.com/user_avatar/www.ruby-forum.com/sadiq123/32/2866_2.png) [@sadiq123](https://www.ruby-forum.com/u/sadiq123)\ **Post date:** [October 13, 2021, 2:09pm UTC](https://www.ruby-forum.com/t/usrp-n210-no-device-found/231767/4 "2021-10-13T14:09:24Z")
Hi guys, can you help me on this as well. I am using n210 usrp as well with srsRAN. But when i run the command with srsenb it says no rf device found