venerdì 30 gennaio 2015

Mobilinkd TNC2 on Ubuntu Linux

First step let Ubuntu to see the modem

My bluetooth usb adapter is an old emtec one, Ubuntu 14.04 does recognize it immediately after plug-in in the usb port.

Then I've switched on Mobilinkd TNC2, the blue led started to flash.

The first problem is that the enclosed Ubuntu bluetooth manager does not works with a Bluetooth serial module of the Mobilinkd TNC.

As I try to configure it with the bluetooth manager it request to set a random password on the modem that is not possible.

So install the blueman bluetooth manager:

sudo apt-get install blueman.

Now start blueman and magically it's possible to pair the Mobilinkd TNC and see it as a rf serial /def/rfcomm0

Try to see if the modem is accessible from the serial port with a terminal, like moserial.

The serial port speed should be 115200.

For example in moserial I saw:

== BeRTOS AVR/Mobilinkd TNC2
== Version
== Voltage: 4026mV
== Starting.

Second step AX.25 settings

First install the necessary AX.25 packages:

# sudo apt-get install ax25-tools# sudo apt-get install ax25-apps

Then, configure your AX.25 ports to allow you to access the TNC.

sudo vi  /etc/ax25/axports:
# /etc/ax25/axports


# The format of this file is:


# name callsign speed paclen window description


packet0     IN3AQK-9         115200  255    2      144.900 MHz (1200 bps) Packet

Pay attention no empty lines are allowed!

Then connect the AX.25 packet0 port to the tnc with the command:

sudo kissattach /dev/rfcomm0 packet0

The result is:

AX.25 port packet0 bound to device ax0

With ifconfig you could see a new ax25 port with the ip

Then it's time to call for example:

axcall packet0  IR3DG

Now its, possible to point Xastir to the just created port packet0

To be continued

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