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First run

I assume that you already have a SD card with proper Linux operating system image inserted into “SD CARD” slot on rear panel of the device. If you bought the device from me, then the pre-programmed card should be already inserted to “SD CARD” slot.

First thing to do is to connect ULARI to your LAN network, gain access to it via SSH client and make some necessary configuration changes according to your needs. The default Linux image has a DHCP client function working on Ethernet connection so after connecting the LAN cable to your router, ULARI should get an IP address automatically.

1. Obtaining IP from DHCP server

The easiest way to learn the IP address assigned to ULARI by your router is to check on router webpage. It all depends on your router software and you need to search for something like DHCP leases. This is how it looks like in my router (with OpenWRT).

ULARI will show on DHCP server list as “nanopiduo” because this is the name of microprocessor module used. Assigned IP is in this case but with your router it will surely be different.

ULARI visible as "nanopiduo" on router with DHCP server

2. Connecting to ULARI via SSH terminal

Now we need to get a SSH client to connect to ULARI and make necessary changes in APRS application configuration. For Windows operating system we will use Putty.

Putty SSH terminal

Following fields must be filled correctly:

  • Host name - to your ULARI IP address,
  • Connection type: SSH,
  • Port: 22.

We can also fill the “Saved sessions” field with our connection name and click “Save” to make the application remember it for future use (in my Putty there are a lot of them saved already).

3. First login and root password change

After connecting to ULARI via SSH terminal you will get a login prompt. The default administrator user is root, and the default password is 1234. After first login we will be prompted to change the default root password to a new one (make sure to remember the new password).

Password change procedure will be like that:

  • Enter old password: 1234,
  • Enter new password: your_new_password,
  • Repeat new password: your_new_password.

After changing the password ULARI will ask to a reboot to resize the system partition to the whole SD card. We use a proper command to reset the device:

root@nanopiduo:~# reboot

It may take at least 2-3 minutes for the device to restart (longer for slower SD cards), resize the partition and get ready to accept connections. Then we need to repeat the SSH connection procedure and login with a new root password.

4. Software configuration

Our next step is to configure the software running under Linux to work exactly as we expect. For APRS needs we will need to modify the default Direwolf configuration file. Let's proceed to Direwolf configuration (basic).

firstrun.txt · Last modified: 2019/02/21 23:35 by sq3plx