Assemble the Hardware
The scouting hardware layout consists of:
1 Raspberry Pi Model 3
1 8-port switch
6 Samsung Galaxy Tablets (or any tablet that supports an Ethernet connection)
7 Ethernet cables
6 micro-USB-to-Ethernet adapters
1 12V-to-120V inverter
1 robot battery
Here is how these components connect together:
The Robot Battery powers the 12V-120V converter at the top of the picture (the battery is missing from this picture). This converter powers the Raspberry Pi in the black case.
The Raspberry Pi is connected via an Ethernet cable to the 8-port switch. The Raspberry Pi also powers the 8-port switch from one of it's USB ports.
The 6 tablets are connected to the 8-port switch using a micro-USB-to-Ethernet adapter.
We have a piece of black Velcro attached to this micro-USB-to-Ethernet adapter so that it can stick to the back of its tablet. We did this to try and reduce the wear-and-tear on the micro-USB port. It is cheaper to replace an adapter or an Ethernet cable than a tablet!
The tablets are configured in Airplane mode to turn off their wifi. They get their network connection from the Ethernet connection.
Once the Raspberry Pi is powered on, a browser on each tablet is launched and the static IP address of the Raspberry Pi is entered into the URL window. This brings up the Scouting App.
The Head Scouter clicks on the 'Head Scouter' link and loads the match schedule. Once that is done then the scouters can click on 'Start Scouting' and can select the event to scout.
There is a spare Ethernet port on the 8-port switch for a Head Scouter to connect a laptop. This is useful for uploading a match schedule from The Blue Alliance, or for collecting scouting data for the drive team or for a pick list. The scouting data is stored in CSV format, which can be loaded into Excel or some other spreadsheet application.