Quick start

1. Required items

In order to have a working setup you will need:

  1. The SuM device - included in your order.
  2. A 12V power supply or battery - NOT included in your order.
  3. A LAN cable (optional, but recommended) - NOT included in your order.
  4. An hydrophone with coaxial BNC connector (essential if you plan underwater use) - NOT included in your order.

Further information about the power supply requirements (connector size, power rating) are included in the shipped, physical documentation that must be read before use. If not available, equivalent information can be found in the SuM Hardware Manual. Powering the system through the Raspberry Pi's USB interface is NOT supported, as it may cause the system to fail due to insufficient current draw.

2. Power up

In order to carry out inital configuration, it is preferred to first turn on the modem connecting the power supply only, without peripherals. A green LED on the base board will signal power while a red, blinking LED signals I/O operativity. After some minutes, the SuM's bootstrap will be complete: you may proceed with the initial configuration.

3 Initial configuration

Initial configuration mainly involves setting up the appropriate interface the user intends to communicate with the modem through. All methods require logging into the modem using the default user account credentials, reported below.

username:   sum
password:   sum

After logging in, you may configure the interface of your choice. We recommend using sudo raspi-config for editing WiFi settings and sudo nmtui for editing ethernet settings.

The modem will be shipped with a static Ethernet IP address, fixed at 192.168.3.100. Connect it to a LAN using an Ethernet cable then connect via SSH using the default user credentials.

3.2 Initial access via screen and keyboard

Connect a screen (using the HDMI port) and an USB keyboard to the modem. If nothing is shown on the screen, reboot the modem by unplugging and plugging back the power supply. Log in using default credentials.

3.3 Inital access via WiFi

By default the modem will attempt connection to the sum_wlan WiFi network, providing sum_default as password. Once a WiFi connection with the same parameters is created, the modem will connect to it (it may take a couple of minutes). The modem will acquire an IP address via DHCP: connect via SSH using the default credentials.

At this point, your device should be reachable through the desired interface. Now refer to the Usage section for normal operation.