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Software Define Radio - Amarisoft AMARI LTE 100 SDR

An exercise of running personal 4G LTE base station software on Linux PC.

  • Install and run Amarisoft AMARI LTE 100 SDR on Linux PC to build Personal 4G-LTE Service.
  • UE should be able to connect SDR in this case.

Requirements

Hardware

  • Ubuntu Linux PC
  • Radio frontend: PCIe SDR board x 3
  • RTL8111/8168/8411 PCI Express Gigabit Ethernet Card (Optional) 
    $ lspci
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
08:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
  • WLAN Card (Optional)

Software

Installation

Topology

 -------------------------------------
/             Internet               /
-------------------------------------
                   /        * Outbound Interface of Router:
                  /           - IPv4: 61.228.45.217
                 /            - IPv6: 2001:b011:200b:1d1:1262:ebff:fe90:7320/64
  ------------------------------------
 /             Router                /
/                                   /
------------------------------------
                   /        * Inbound Interface of Router:
                  /           - IPv4: 192.168.167.1
                 /            - IPv6: 2001:b011:200b:129a:1262:ebff:fe90:7320/64  (for example)
   -----------------------------------
  /    Amarisoft AMARI LTE 100       /   * SDR
 /                                  /      - IPv4: 192.168.167.20
/  APN: {default | internet...}    /       - IPv6: 2001:b011:200b:129a:6245:cbff:fe87:5612/64   (for example)
-----------------------------------
         /\                     /\       * UE: APN1 (Default APN) ... APN-2, APN-3, APN-4
        /  \       APN1        /  \        - IPv4:                 - IPv6:
       /    \                     /    \         * tun0: 192.168.2.1      * tun0:
   ---------------        ---------------    * tun1: 192.168.3.1      * tun1:
  /     UE 1     /       /     UE 2 ... /    * tun2: 192.168.4.1      * tun2: 2001:468:3000:1::/48
  ---------------        ---------------     * tun3: 192.168.5.1      * tun3: 2001:468:4000:1::/48
  IPv4: 192.168.2.x     IPv4: 192.168.3.x

Ubuntu PC

  • Download Ubuntu Server ISO Image and burn it into USB dongle by rufus with below setting.
rufus2.18 rufus3.1
r r

  • Plug Ubuntu dongle to PC and bootup PC by using this Bootable dongle (selecting USB Bootup in BIOS/UEFI boot menu)

  • Install Ubuntu Server to Linux PC, enable Standard system utilities, Virtual Machine host and OpenSSH server r

  • there will be some network interfaces

# ifconfig
enp0s31f6 Link encap:Ethernet  HWaddr 60:45:cb:87:56:12
          inet addr:192.168.0.12  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::6245:cbff:fe87:5612/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:144 errors:0 dropped:0 overruns:0 frame:0
          TX packets:140 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:22555 (22.5 KB)  TX bytes:23194 (23.1 KB)
          Interrupt:16 Memory:f7700000-f7720000

enp5s0    Link encap:Ethernet  HWaddr 00:e0:4c:68:4e:c9                      #<= for KVM
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

enp6s0    Link encap:Ethernet  HWaddr 00:e0:4c:68:4e:ca
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

enp7s0    Link encap:Ethernet  HWaddr 00:e0:4c:68:4e:cb
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

enp8s0    Link encap:Ethernet  HWaddr 00:e0:4c:68:4e:cc
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

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:185 errors:0 dropped:0 overruns:0 frame:0
          TX packets:185 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:13781 (13.7 KB)  TX bytes:13781 (13.7 KB)

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00                      #<= KVM
          inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
  • Install ubuntu-desktop to PC
$ sudo apt-get update
$ sudo apt-get install ubuntu-desktop
$ sudo apt-get install lxde           #<= (Optional)
$ sudo startx
  • Install below packages to Ubuntu PC
$ sudo apt-get install wireshark    #<= packet capturer
$ sudo apt-get install shutter      #<= Screenshot capturer (Optional)
  • Use Fixed IP on SDR, put below setting to /etc/network/interfaces (Optional)
auto lo
iface lo inet loopback

auto enp0s31f6                                           #<= Interface
iface enp0s31f6 inet static  
address 192.168.167.20                                   #<= Fixed IP
netmask 255.255.255.0
gateway 192.168.167.1
dns-nameserver 8.8.8.8
dns-nameserver 8.8.4.4

# IPv6
iface enp0s31f6 inet6 auto
  • Issue below command to restart netwoek service
$ sudo /etc/init.d/networking restart

AMARI LTE 100

  • Place key to .amarisoft folder 
$ sudo mkdir /root/.amarisoft
$ sudo cp lteenb.key /root/.amarisoft/
$ sudo cp ltemme.key /root/.amarisoft/
  • Untar SDR software amarisoft.yyyy-mm-dd.tar.gz (e.q amarisoft.2018-04-01.tar.gz) 
$ sudo tar xvf amarisoft.yyyy-mm-dd.tar.gz
$ sudo cd yyyy-mm-dd
$ sudo ./install.sh
  • Installation

r

  • There will be four network interfaces (tun0 ~ tun3) for APN 1 to 4 as default 
$ sudo ifconfig

tun0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00              #<= APN 1
          inet addr:192.168.2.1  P-t-P:192.168.2.1  Mask:255.255.255.0
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:0 (0.0 B)  TX bytes:152 (152.0 B)

tun1      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00              #<= APN 2
          inet addr:192.168.3.1  P-t-P:192.168.3.1  Mask:255.255.255.0
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:0 (0.0 B)  TX bytes:152 (152.0 B)

tun2      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00              #<= APN 3
          inet addr:192.168.4.1  P-t-P:192.168.4.1  Mask:255.255.255.0
          inet6 addr: 2001:468:3000:1::/48 Scope:Global
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:0 (0.0 B)  TX bytes:152 (152.0 B)

tun3      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00              #<= APN 4
          inet addr:192.168.5.1  P-t-P:192.168.5.1  Mask:255.255.255.0
          inet6 addr: 2001:468:4000:1::/48 Scope:Global
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:0 (0.0 B)  TX bytes:152 (152.0 B)

Troubleshooting

  • Try to run MME, IMS, MBMS and eNB step-by-step, it will show the message if there is any problem while running each service.
$ sudo cd /root/mme
$ sudo ./ltemme config/mme.cfg
$
$ sudo cd ../ims
$ sudo ./lteims config/ims.cfg
$
$ sudo cd ../mbms
$ sudo ./ltembms
$
$ sudo cd ../enb
$ sudo ./lteenb config/enb.cfg

Amarisoft LTE Service

  • There are the command which tunning Amarisoft LTE Service ON/OFF 
$ sudo service lte start           #<= START   the LTE Service
$ sudo service lte stop            #<= STOP    the LTE Service
$ sudo service lte restart         #<= RESTART the LTE Service
  • Monitor Amarisoft Console
# screen -x lte
(enb) t            # <= to active debug mode
(enb) ue           # <= to list ue which connect to
  • Screen Switching
Hot-Key Prompt Message Comment
CTRL-A + 0 (mme) (mme) log file.rotate=50M,file.path=/var/log/lte/
CTRL-A + 1 (enb) (enb) log file.rotate=50M,file.path=/var/log/lte/
CTRL-A + 2 (mbms) (mbms) log file.rotate=50M,file.path=/var/log/lte/
CTRL-A + 3 (ims) (ims) log file.rotate=50M,file.path=/var/log/lte/
CTRL-A + D n/a [detached from 9541.lte] Exit Console

Scripts

eNB

  • Turn-Key Scripts: There are some default scripts for 1CC, 2CC, 3CC, Multi-Cell, Cat-M1 and NB-IoT connections in this case.
# Turnkey BW (n_rb_dl) DL Antenna (n_antenna_dl) UL Antenna (n_antenna_ul) PCC (dl_earfcn) SCC1(or Cell2) SCC2
1 enb-1_4mhz.cfg 6 (1.4M) 1 1 1692 (B3) n/a n/a
2 enb-2cc-mimo.cfg 100 ( 20M) 2 1 900 (B2) 2150 (B4) n/a
3 enb-3cc-mimo.cfg 50 ( 10M) 2 1 900 (B2) 2150 (B4) 300 (B1)
4 enb-ca.cfg 25 ( 5M) 1 1 900 (B2) 2150 (B4) n/a
5 mimo-2x2-5mhz.cfg 25 ( 5M) 2 2 3350 (B7) n/a n/a
6 mimo-2x2-20mhz.cfg 100 ( 20M) 2 2 3350 (B7) n/a n/a
7 multi-cell.cfg 25 ( 5M) 1 1 3350 (B7) 3299 (B7) n/a
8 enb-nbiot.cfg n/a 1 1 6300 (B20) n/a n/a
9 enb-nbiot-inband.cfg 25 ( 5M) 1 1 6300 (B20) n/a n/a
10 enb-catm1.cfg n/a N_ANTENNA_DL 1 3350 (B7) n/a n/a

PS. mimo-2x2-5mhz.cfg soft-link to enb.cfg as default eNB Script

  • Scripts after modification
# Modification BW (n_rb_dl) DL Antenna (n_antenna_dl) UL Antenna (n_antenna_ul) PCC (dl_earfcn) SCC1(or Cell2) SCC2
1 enb-1cc-mimo2.cfg 25 ( 5M) 2 1 1692 (B3) n/a n/a
2 enb-2cc-mimo2.cfg 25 ( 5M) 2 1 1692 (B3) 3350 (B7) n/a
3 enb-3cc-mimo2.cfg 25 ( 5M) 2 1 1692 (B3) 3350 (B7) 300 (B28)
# (Band) MAX BW dl_earfcn DL Center Frequency
1 20 300 2132 MHz
2 900 1960 MHz
3 1575 1842.5 MHz
4 2150/2175 2130 MHz/(FIXME)
5 2525 881.5 MHz
7 3100/3350 (FIXME)/2680 MHz
8 3625 (FIXME) (FIXME)
12 5095 (FIXME) (FIXME)
13 5230 (FIXME) (FIXME)
17 5790 (FIXME) (FIXME)
18 5925 (FIXME) (FIXME)
19 6075 (FIXME) (FIXME)
20 6300 806 MHz
21 6525 (FIXME) (FIXME)
25 8365 (FIXME) (FIXME)
26 8865 (FIXME) (FIXME)
28 9345 (FIXME) (FIXME)
29 9715 (FIXME) (FIXME)
30 9820 (FIXME) (FIXME)
  • TDD Band and dl_earfcn
# (Band) MAX BW dl_earfcn DL Center Frequency
38 38000/38050 (FIXME)/2600 MHz
39 38450 (FIXME) (FIXME)
40 39150 (FIXME) (FIXME)
41 40620 2593 MHz
42 42590 3500 MHz
66 66886 (FIXME) (FIXME)
  • Reference
  • (Telit LN940 – LTE Cat 9 & 11 M.2 Data Cards)[https://rutronik-tec.com/ln940/]
  • default eNodeB scripts in Amarisoft 
    root@sdr:~/enb/config# ls
drb.cfg           enb.cfg                  meas_config_a3_3350.asn   sib15.asn           sib23_rb25_srs_sc4.asn
drb_nb.cfg        enb.default.cfg          meas_config_periodic.asn  sib1.asn            sib23_rb50.asn
drb-tdd.cfg       enb-mbms.cfg             mimo-2x2-20mhz.cfg        sib1-mbms.asn       sib23_rb50_br.asn
enb-1_4mhz.cfg    enb-nbiot.cfg            mimo-2x2-5mhz.cfg         sib23_rb100.asn     sib23_rb6.asn
enb-2cc-mimo.cfg  enb-nbiot-inband.cfg     multi-cell.cfg            sib23_rb15.asn      sib23_rb75.asn
enb-3cc-mimo.cfg  enb-parallel.cfg         rf_driver                 sib23_rb25.asn      sib2_nb.asn
enb-ca.cfg        enb-tdd.cfg              rf_select.sh              sib23_rb25_br.asn   sib5.asn
enb-catm1.cfg     meas_config_a3_3299.asn  sdr                       sib23_rb25_nbr.asn  sib6.asn

MME

APN

  • APN profile in mme.cfg by default
access_point_name pdn_type first_ip_addr last_ip_addr ip_addr_shift dns_addr pdn_type first_ipv6_prefix last_ipv6_prefix dns_addr
default ipv4 192.168.2.2 192.168.2.254 2 8.8.8.8 n/a n/a n/a n/a
internet ipv4 192.168.3.2 192.168.3.254 2 8.8.8.8 /ipv4v6/ 2001:468:3000:1:: 2001:468:3000:ffff:: 2001:4860:4860::8888
ims n/a 192.168.4.2 192.168.4.254 2 8.8.8.8 n/a 2001:468:3000:1:: 2001:468:3000:ffff:: 2001:4860:4860::8888
sos 192.168.5.2 192.168.5.254 2 8.8.8.8 ipv4v6 2001:468:4000:1:: 2001:468:4000:ffff:: 2001:4860:4860::8888

PS. APN2's ipv4v6 is commented by default

  • APN profile after modification mme2.cfg for IPv4v6 DualStack
access_point_name pdn_type first_ip_addr last_ip_addr ip_addr_shift dns_addr pdn_type first_ipv6_prefix last_ipv6_prefix dns_addr
default ipv4 192.168.2.2 192.168.2.254 2 8.8.8.8 n/a n/a n/a n/a
internet ipv4 192.168.3.2 192.168.3.254 2 8.8.8.8 ipv4v6 2001:468:3000:1:: 2001:468:3000:ffff:: 2001:4860:4860::8888
ims n/a 192.168.4.2 192.168.4.254 2 8.8.8.8 n/a 2001:468:3000:1:: 2001:468:3000:ffff:: 2001:4860:4860::8888
sos 192.168.5.2 192.168.5.254 2 8.8.8.8 ipv4v6 2001:468:4000:1:: 2001:468:4000:ffff:: 2001:4860:4860::8888

PS. Turn on IPv6 for APN1 and APN2 [FIXME]

UE Database

SIM sim_algo imsi amf sqn K impi impu
Anritsu xor 001010123456789 0x9001 000000000000 00112233445566778899aabbccddeeff 001010123456789@ims.mnc001.mcc001.3gppnetwork.org ["001010123456789", "tel:0600000000", "tel:600"]
SIM sim_algo imsi amf sqn Ki impi impu
Anritsu xor 001010123456789 0x9001 000000000000 00112233445566778899aabbccddeeff 001010123456789@ims.mnc001.mcc001.3gppnetwork.org ["001010123456789", "tel:0600000000", "tel:600"]
R&S (Taobao) xor 001012345678901 0x9001 000000000000 000102030405060708090A0B0C0D0E0F 001010123456789@ims.mnc001.mcc001.3gppnetwork.org ["001010123456789", "tel:0600000000", "tel:600"]
R&S (Z04) xor 001010123456063 0x9001 000000000000 000102030405060708090A0B0C0D0E0F 001010123456789@ims.mnc001.mcc001.3gppnetwork.org ["001010123456789", "tel:0600000000", "tel:600"]
R&S (Z05) xor 001010123456063 0x9001 000000000000 000102030405060708090A0B0C0D0E0F 001010123456789@ims.mnc001.mcc001.3gppnetwork.org ["001010123456789", "tel:0600000000", "tel:600"]
  • All files under mme configuration folder by default
root@sdr:~/mme/config# ls
ims.cfg        mme.cfg          mme-ifup     mt_call_qos.sdp  mt_call_video.sdp
lte_ue_ims.db  mme-default.cfg  mme-ims.cfg  mt_call.sdp      ue_db-ims.cfg

IMS

  • n/a

MBMS

  • n/a

Connectivity

  • Enable SDR
  • Power on UE
  • UE should be able to 
(mme) ue
            IMSI           IMEISV     M_TMSI REG           TAC #ERAB IP_ADDR
 001010123456789 8611070337354809 0x36b751cb   Y  00101.   0x1     1 192.168.2.2

Usage - Restful API

Throughput Test

Speedtest

Ixia IxChariot

  • Install Endpoint
  • Enable DMZ on CPE
  • Running IxChariot on PC

Iperf

  • TCP
  • Server 
    tbd
  • Client 
    tbd
  • UDP
  • Server 
    tbd
  • Client 
    tbd

Web File

  • Place 1g file to /var/www/html
$ sudo dd if=/dev/zero of=1g bs=1048576 count=0 seek=1024
  • Download this file to CPE (or LAN-PC/KVM)
$ wget -O/dev/null http://192.168.2.1/1g
- OR-
$ curl http://192.168.2.1/1g > /dev/null 2>&1
  • Script (Continuous Download)
[TBD]

FTP

  • Enable one FTP Sservice on SDR
$ sudo apt-get install vsftpd
  • Create one 1g file for downloading test 
    $ sudo dd if=/dev/zero of=1g bs=1048576 count=0 seek=1024
  0+0 records in
  0+0 records out
  0 bytes copied, 0.000119446 s, 0.0 kB/s
$ chmod 777 1g
$ ls -lah 1g
  -rwxrwxrwx 1 root root 1.0M Jul  2 16:47 1g
  • Try to access FTP server via FTP client on Windows 7 
    C:\Windows\system32>ftp 192.168.0.12
已連線到 192.168.0.12。
220 (vsFTPd 3.0.3)
使用者 (192.168.0.12:(none)): sdr
331 Please specify the password.
密碼:
230 Login successful.
ftp> ls
200 PORT command successful. Consider using PASV.
150 Here comes the directory listing.
226 Directory send OK.
ftp> pwd
257 "/home/sdr" is the current directory
ftp> get 1g
ftp> bye

Speedtest

  • Test by Internet Speedtest Server

  • Test by using Local Speedtest Server

Throughput Test by Virtual Machine(Advanced)

$ wget http://ftp.ubuntu-tw.net/ubuntu-releases/18.04/ubuntu-18.04-live-server-amd64.iso
  • Prepare KVM program
$ apt-get update
$ apt-get install qemu-utils qemu-system-x86
$ apt-get install qemu-kvm libvirt-bin ubuntu-vm-builder bridge-utils
$ apt-get install virt-viewer
$ apt-get install virt-manager

Troubleshooting

Log

  • else screen -x, SDR also provide below debug method
  • Console:
    • /tmp/enb0.log
    • /tmp/ims.log
    • /tmp/lte.log
    • /tmp/mbmsgw.log
    • /tmp/mme.log
  • GUI:
    • http://192.168.0.12/lte/

CPU Usage

  • top
  • sysstat
  • mpstat (CPU usages for each core) 
# mpstat 2 -P ALL
Linux 4.4.0-128-generic (sdr)   07/03/2018      _x86_64_        (8 CPU)

10:54:59 AM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
10:55:01 AM  all    1.54    0.00    0.64    0.06    0.00    0.00    0.00    0.00    0.00   97.75
10:55:01 AM    0    2.13    0.00    0.53    0.00    0.00    0.00    0.00    0.00    0.00   97.34
10:55:01 AM    1    1.60    0.00    0.53    0.00    0.00    0.00    0.00    0.00    0.00   97.86
10:55:01 AM    2    5.85    0.00    1.60    0.00    0.00    0.00    0.00    0.00    0.00   92.55
10:55:01 AM    3    2.63    0.00    1.05    0.00    0.00    0.00    0.00    0.00    0.00   96.32
10:55:01 AM    4    0.00    0.00    0.00    0.50    0.00    0.00    0.00    0.00    0.00   99.50
10:55:01 AM    5    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00
10:55:01 AM    6    0.50    0.00    0.50    0.00    0.00    0.00    0.00    0.00    0.00   99.00
10:55:01 AM    7    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00

TRX_SDR

SDR Card

  • Precondition: Disable SDR service
$ sudo service lte stop
  • Blinking LED on SDR Card 1, Card 2 and Card 3 
$ sudo ./sdr_util -c 0 led 1
=== Device /dev/sdr0 ===
$ sudo ./sdr_util -c 1 led 1
=== Device /dev/sdr0 ===
$ sudo ./sdr_util -c 2 led 1
=== Device /dev/sdr0 ===
  • Turn LED off
$ sudo ./sdr_util -c 0 led 0
=== Device /dev/sdr0 ===
$ sudo ./sdr_util -c 1 led 0
=== Device /dev/sdr0 ===
$ sudo ./sdr_util -c 2 led 0
=== Device /dev/sdr0 ===

GPS status

  • Display GPS status
$ sudo ./sdr_util gps_state
=== Device /dev/sdr0 ===
GPS not locked
=== Device /dev/sdr1 ===
GPS not locked
=== Device /dev/sdr2 ===
GPS not locked

Syslog

Installation

  • line 100 

    ./install.sh: line 100: [: 16.04: integer expression expected

  • link 60 

    /root/trx_sdr/install.sh: line 60: [: 16.04: integer expression expected

<--

Instrument

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Reference