SPL Sense for Linux on SPL Documentation

Hardware and operating system

Mon, 01 Jan 0001 00:00:00 +0000

Hardware

You can buy the Raspberry Pi from electronics retailers. We have tested:

Raspberry Pi 4 or 5, Model B (all memory variants)
for power over the network cable: the official Power-over-Ethernet module (PoE HAT) for the Raspberry Pi 3B+ and 4B

Memory card

The memory card is the part most likely to fail after many operating hours. SPL Sense writes little, but a high-quality micro SD card is still worth it. We have had good experiences with “SanDisk Extreme Pro”.

Installation

Mon, 01 Jan 0001 00:00:00 +0000

SPL Sense is installed via the command line, either directly on the Raspberry Pi (program Terminal) or via SSH from another computer. With SSH you can copy and paste the commands and avoid typing errors.

Connecting via SSH

Your computer must be in the same network as the Raspberry Pi.

macOS and Linux: in the terminal ssh <user>@<ip-address>, for example ssh pi@192.168.10.144
Windows: in the terminal (PowerShell) also ssh <user>@<ip-address>, or with PuTTY: enter the IP address under Host Name, set Connection type to SSH, then Open

User and password are the ones you set in the Raspberry Pi Imager.

Update

Mon, 01 Jan 0001 00:00:00 +0000

Automatically

On Linux, SPL Sense updates itself like on the other platforms: when a new version is available, Update available appears on the overview. Stop the measurement and click Update and Update and restart. See Installation and updates.

This works if SPL Sense is set up as described in the installation.

Manually

If the automatic update fails, update via the command line. Connect to the Raspberry Pi as in the installation. The general notes apply here too.

Operation

Mon, 01 Jan 0001 00:00:00 +0000

Addresses

With port 8080 from the installation:

	Address
Web interface	`http://<ip-address>:8080`
Live screen	`http://<ip-address>:8080/measurement/live`
Live screen in kiosk mode	`http://<ip-address>:8080/measurement/live?kiosk`
SPL Sense API	`http://<ip-address>:8080/api`

On the Raspberry Pi itself, you can use localhost instead of the IP address.

Kiosk display

For a permanent display, for example a screen at the DJ booth, the browser opens the live screen directly in kiosk mode, for example with Chromium: