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  2. Verifying CORE Install Config on UDRC DRAWS
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Verify image write to micro SD card

  • The fact that the micro SD card boots is a good indication that things might be OK
  • If you are using a single micro SD card for your RPi and you previously ran app_config.sh core on the old image, the following script will verify that your current image has not been configured after writing the image to the micro SD card.

  • This script is just an indication that the app_config.sh core script has successfully run or not.

    • Check with cfgcheck.sh before running app_config.sh core

      n7nix/config/cfgcheck.sh

  • If you see the following as the output then your image did not get copied properly.

    -- app_config.sh core script has ALREADY been run

  • This is the output from cfgcheck.sh you would expect on a new image that has not been configured yet with app_config.sh core

    -- app_config.sh core script has NOT been run: hostname: 1, passwd: 1, logfile: 1

Testing direwolf & the UDRC/DRAWS Hat

  • Before verifying CORE functionality you must have run the app config script
  • The first few commands assume a direwolf/ax.25 installation

  • The showudrc.sh script in the local bin directory executes many of the commands listed below.

    • The copious output of this script will usually show you any installation & configuration anomalies

  • The image you are running will NOT have direwolf running from boot.

    • You can verify that direwolf is not running by typing:

      pidof direwolf

    • If this command returns with a number, it will be the process id of direwolf.

    • if no number is returned direwolf is not running.

  • To start direwolf

    cd bin
sudo su
./ax25-start

Test Receive

  • Connect a cable from your UDRC/DRAWWS hat to your radio.

  • Tune your radio to the 2M 1200 baud APRS frequency 144.390 or some frequency known to have packet traffic

    • You should now be able to see the packets decoded by direwolf

  • Open a console on your pi and type:

    tail -f /var/log/direwolf/direwolf.log
    • or open another console window & start up a packet spy
    sudo su
listen -at

Test Transmit

  • Tune your radio to the 1200 baud APRS frequency: 144.39

    cd
cd n7nix/debug
sudo su
# Test left channel
./btest.sh -P udr0
# Test right channel
./btest.sh -P udr1
# To see all the options available
./btest.sh -h

    • This will send either a position beacon or a message beacon with the -p or -m options.

    • Using a browser go to: aprs.fi

    • Under Other Views, click on raw packets

    • Put your call sign followed by an asterisk in "Originating callsign"

    • Click search, you should see the beacon you just transmitted.

    Check status of all AX.25 & direwolf processes started with systemd

    • Open another console window to the pi and as user pi type: bash ax25-status -d

  • After == failed & loaded but inactive units== you should see

    0 loaded units listed.

  • In your local bin directory(~/bin) you can stop and start the entire ax.25/tnc stack including direwolf with these commands:

    • Note you need to do this as root
sudo su
cd ~/bin
./ax25-stop
./ax25-start
  • Other progams that confirm that the installation was successful

check hardware version of Raspberry Pi & DRAWS Hat

cd ~/n7nix/bin
./piver.sh
./udrcver.sh

check ALSA soundcard enumeration & levels

cd ~/bin
./sndcard.sh

check ALSA settings for deviation

  • Show the left & right audio channel settings
alsa-show.sh

 ===== ALSA Controls for Radio Tansmit =====
LO Driver Gain  L:[0.00dB]	R:[0.00dB]
PCM	        L:[0.00dB]	R:[0.00dB]
DAC Playback PT	L:[PTM_P3]	R:[PTM_P3]
LO Playback CM	[Full Chip CM]

 ===== ALSA Controls for Radio Receive =====
ADC Level	L:[0.00dB]	R:[0.00dB]
IN1		L:[Off]		R:[Off]
IN2		L:[10 kOhm]	R:[10 kOhm
Set output ie. deviation with these controls
  • Each of these outputs has its own amplifier
  • PCM : digital control
    • output samples are multiplied by a value determined by this control before being sent to the DAC
  • LO Driver Gain : Analog control
    • determines the gain of the ANALOG output amplifier.
Set input with this control
  • ADC Level : digital control

check A2D converter

sensors

ads1015-i2c-1-48
Adapter: bcm2835 I2C adapter
User ADC Differential:  +0.00 V
+12V:                  +12.27 V
User ADC 1:             +0.00 V
User ADC 2:             +0.00 V

[Check GPS](check

Check GPS

  • Battery: CR 1220 3V lithium non-rechargeable

  • Check status of chronyd daemon

    systemctl status chronyd

  • Check how many gps channels (satellites) are active

    gpsmon

  • or

    cgps

  • or

    # For Raw NMEA sentences
gpspipe -r

# For GPS binary sentences
gpspipe -R

# For gpsd native data
gpspipe -w

Check chrony synchronization

  • NOTE: with just GPS and no Internet time servers it often takes 10 minutes for the chrony server to enter online mode.

  • To check if chrony is synchronized, make use of the tracking, sources, and sourcestats commands.

  • Display information about the current time sources that chronyd is accessing.

    chronyc sources

    210 Number of sources = 6
MS Name/IP address         Stratum Poll Reach LastRx Last sample
===============================================================================
#x GPS                           0   3   377    12    +83ms[  +83ms] +/-  102ms
#* PPS                           0   3   377    11   +239ms[ +239ms] +/-  242ns
^- 45.32.199.189.vultr.com       2   6   377   293   +237ms[ +237ms] +/-   69ms
^- t2.time.gq1.yahoo.com         2   8   377    43   +239ms[ +239ms] +/-   34ms
^- linode1.ernest-doss.org       3   7   377    43   +242ms[ +242ms] +/-  124ms
^- t1.time.bf1.yahoo.com         2   6   377    35   +240ms[ +240ms] +/-   47ms

  • Check source stats

    chronyc sourcestats

    210 Number of sources = 6
Name/IP Address            NP  NR  Span  Frequency  Freq Skew  Offset  Std Dev
==============================================================================
GPS                         8   6    55   -569.805   1137.333   -199ms  9188us
PPS                         7   5    48     -0.328      0.026  +1761us   134ns
clockb.ntpjs.org           28  13  107m     -0.347      0.030   -177us    55us
h184-60-28-49.mdtnwi.dsl>  35  19  139m     -0.059      0.082  +2990us   285us
clock.trit.net             29  13  141m     -0.256      0.013  -8385us    35us
mia1.m-d.net               18   9   73m     -0.280      0.190   -588us   235us

  • Check chrony tracking - Check to confirm that NEMA is being used as the reference.

    • shows how good current time is and what the offset of the system clock is.

  • Link for field definitons

    chonyc tracking

    Reference ID    : 50505300 (PPS)
Stratum         : 1
Ref time (UTC)  : Sat Dec 15 18:10:07 2018
System time     : 0.000000008 seconds fast of NTP time
Last offset     : -0.000406383 seconds
RMS offset      : 0.000406383 seconds
Frequency       : 1.149 ppm fast
Residual freq   : +0.259 ppm
Skew            : 0.123 ppm
Root delay      : 0.000000 seconds
Root dispersion : 0.002010 seconds
Update interval : 0.0 seconds
Leap status     : Normal

Testing AX.25

  • Verify AX.25 & direwolf are running by running this command:

    ax25-status

  • expect this output

    Status for direwolf.service: RUNNING and ENABLED
Status for ax25dev.service: RUNNING and ENABLED
Status for ax25dev.path: RUNNING and ENABLED
Status for ax25-mheardd.service: RUNNING and ENABLED
Status for ax25d.service: RUNNING and ENABLED

  • If you don't see the above then start AX.25 & direwolf like this:

    cd bin
sudo su
./ax25-start

  • In a console type:

    netstat --ax25
    • You should see a list of open listening sockets that looks something like this: ``` Active AX.25 sockets Dest Source Device State Vr/Vs Send-Q Recv-Q

  • N7NIX-0 ax1 LISTENING 000/000 0 0

  • N7NIX-10 ax1 LISTENING 000/000 0 0

    
* Display AX.25 calls recently heard.
* Must have connection to radio

```bash
mheard

  • You should see something like this:

    Callsign  Port Packets   Last Heard
KG7HQ-15   udr0     72   Sat Apr  1 08:52:59
N7DKL-9    udr0      8   Sat Apr  1 08:52:46
W7COA-9    udr0     23   Sat Apr  1 08:52:28
BALDI      udr0      2   Sat Apr  1 08:52:18
WA7EBH-15  udr0      2   Sat Apr  1 08:52:13
VA7RKC-9   udr0      1   Sat Apr  1 08:52:06
VE7OLG-9   udr0      2   Sat Apr  1 08:51:53
VE7ZKI-8   udr0      3   Sat Apr  1 08:51:48
VA7MAS     udr0      6   Sat Apr  1 08:51:37
SEDRO      udr0      2   Sat Apr  1 08:51:35
VE7ZNS     udr0      1   Sat Apr  1 08:51:22
W7WEC-9    udr0      7   Sat Apr  1 08:51:19
SNOVAL     udr0      1   Sat Apr  1 08:50:58
VE7FAA-9   udr0      8   Sat Apr  1 08:50:37
WB4KGY-3   udr0      1   Sat Apr  1 08:49:36
VE7NV-1    udr0      1   Sat Apr  1 08:48:52
KF7VOP     udr0      1   Sat Apr  1 08:48:35
VA7HXD     udr0      1   Sat Apr  1 08:47:53
NG7W       udr0      3   Sat Apr  1 08:47:26
VE7MKF-3   udr0      3   Sat Apr  1 08:46:48
K7KCA-12   udr0     11   Sat Apr  1 08:46:19
LDYSMH     udr0      1   Sat Apr  1 08:46:00
DOGMTN     udr0      1   Sat Apr  1 08:45:44
VE7RVT-12  udr0      1   Sat Apr  1 08:44:36
VA7MP      udr0      1   Sat Apr  1 08:43:04

Test RPi sound

  • Be sure the volume is turned up for this audio device.

  • enable RPi audio device in /boot/config.txt by uncommenting the following line

    dtparam=audio=on

Test analog audio

  • Play a short xastir wave file

    cd /usr/share/xastir/sounds
aplay -D "plughw:0,0" bandopen.wav

  • Output pink noise

    speaker-test --channels 2 --rate 48000 --device plughw:0,0

Test HDMI audio

  • Add the following to /boot/config.txt , then reboot

    # forces HDMI mode
hdmi_drive=2

  • Test using a xastir wave file

    cd /usr/share/xastir/sounds
aplay -D "plughw:0,1" silence.wav bandopen.wav

  • Output pink noise

    speaker-test --channels 2 --rate 48000 --device plughw:0,1

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