John's Vademecum

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====== Svx Mobile ======

**Plan...**

To make a mobile hotspot that will provide access to SVXReflector and Echolink as well as a handy single-frequency parrot repeater.

===== Hardware =====

Remains the same as the previous portable hotspot

  * Raspberry Pi
  * CM108 soundcard
  * IC-2E
  * MiFi router 

It will be installed in my vehicle, which also has a TM-D710 for APRS and voice comms. 

  * <todo>Add 5V regulator to power R.Pi from 12VDC</todo>
  * <todo>Put everything in a grab-box for portability</todo>


===== SVXLink Config ===== 


  * Echolink Module enabled (switchable via DTMF commands)
  * Echolink using a [[public:radio:dormant:jre_echolink| ]] running on my VPS machine to enable incoming connections.

==== Logic.tcl additions for switching EL on/off ====

Added to ''<...>/events.d/local/Logic.tcl''

<code tcl>
 # Example: Custom command executed when DTMF 97 is received
  if {$cmd == "97"} {
    puts "Executing external command"
    playMsg "Core" "online"
    exec /home/gm4slv/svx_ref_el.sh &
    return 1
  }

  # Example: Custom command executed when DTMF 98 is received
  if {$cmd == "98"} {
    puts "Executing external command"
    playMsg "Core" "online"
    exec /home/gm4slv/svx_ref_noel.sh &
    return 1
  }
  # Example: Custom command executed when DTMF 99 is received
  if {$cmd == "99"} {
    puts "Executing external command"
    playMsg "Core" "online"
    exec /home/gm4slv/svx_noref_el.sh &
    return 1
  }

</code>

  * DTMF command ''97#'' will cause svxlink to restart with **Reflector** connected, **Echolink** connected.
  * DTMF command ''98#'' will cause svxlink to restart with **Reflector** connected, **Echolink** disabled.
  * DTMF command ''99#'' will cause svxlink to restart with **Reflector** disabled, **Echolink** connected.

==== Start with Reflector ON and Echolink ON ==== 

''97#''

<code bash>
#!/bin/bash

CFG=/usr/local/etc/svxlink/svxlink_ref_el.conf
LOG=/home/gm4slv/svxlink.log

sudo killall svxlink
sudo killall svxlink
sudo killall svxlink

echo "25" > /sys/class/gpio/export

sleep 2

echo "out" > /sys/class/gpio/gpio25/direction

sudo svxlink --daemon --logfile=$LOG --config=$CFG
exit 0


</code>

==== Start with Reflector ON, Echolink Disabled ====

''98#''


<code bash>

#!/bin/bash

CFG=/usr/local/etc/svxlink/svxlink_ref_noel.conf
LOG=/home/gm4slv/svxlink.log

sudo killall svxlink
sudo killall svxlink
sudo killall svxlink

echo "25" > /sys/class/gpio/export

sleep 2

echo "out" > /sys/class/gpio/gpio25/direction

sudo svxlink --daemon --logfile=$LOG --config=$CFG
exit 0

</code>

=== Start with Reflector disabled, Echolink ON ===

''99#''
 
<code bash>
#!/bin/bash

CFG=/usr/local/etc/svxlink/svxlink_noref_el.conf
LOG=/home/gm4slv/svxlink.log

sudo killall svxlink
sudo killall svxlink
sudo killall svxlink

echo "25" > /sys/class/gpio/export

sleep 2

echo "out" > /sys/class/gpio/gpio25/direction

sudo svxlink --daemon --logfile=$LOG --config=$CFG
exit 0

</code>

It's probable that I'll configure the initial start ''@reboot'' to be //with// Reflector **and** Echolink  

''crontab''  ->  ''@reboot sleep 30 && sudo -u gm4slv /home/gm4slv/svx_ref_el.sh >/dev/null 2>&1''

Using a PROXY server for connecting to Echolink, and be able to accept incoming Echolink connections, is necessary because it's not possible to control external firewall/port forwarding when using the MiFi 4G router for internet access. 

Connecting ''direct'' to Echolink, without the ''proxy'' still allows outgoing Echolink connections to be made

Rather than relying on other ''PUBLIC'' Echolink proxies I though it would be wise to install and run a proxy server myself, on the VPS machine. It turned out to be easier than I thought and the basic steps are [[public:radio:dormant:jre_echolink| here]]


===== Parrot =====

I imagine being able to use the Parrot feature as a temporary single-frequency repeater perhaps for emergency use? 

I'll experiment....



==== Page Info ====


--- //John Pumford-Green 03/06/22 17:59//

Page last updated: ~~LASTMOD~~

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