Jaffa Networks

Jaffa's network has over time grown to contain quite a few devices and different networking protocols. Primarily, Jaffa's instrumentation and devices are attached to her NMEA2000 network. Additionally, there is a much smaller I2C network and Ethernet network. The Raspberry Pi is primarily responsible for routing between all of these different networks, though the AIS transponder handles the NMEA2000 to NMEA0183 conversion for the VHF set.

Jaffa's Digital Networks

Radio

There are 5 devices on board that have some kind of radio equipment:

• Raspberry Pi: has Bluetooth and two WiFi adapters. It hosts the "Jaffa" WiFi hotspot and is capable of connecting to other hotspots. The Bluetooth is used for peripheral devices and connection to the radio.
• NavTex receiver: Has an antenna to receive NavTex signals at a to-be-determined location.
• VHF set: Has an antenna on the headbox of the mast, or when the mast is not set, a channel antenna somewhere close to the toilet.
• AIS transponder: Has a GPS antenna on the starboard pushpit and a VHF antenna on the topmost starboard spreader. If the mast is not set the VHF antenna is somewhere close to the toilet.
• Autopilot: Has Bluetooth (unused) and WiFi. The WiFi is connected to the "Jaffa" network as if it was not connected to any network, it would broadcast it's own AP, which is annoying.

Power

Most devices connected to the NMEA2000 bus receive power from the bus. An exception exists for the plotter, the Raspberry Pi, and the AIS transponder. They receive their power directly from the switch-panel.