Navigational messaging system NMEA 2000 integrates with upcoming Raspberry Pi 5 and OpenPlotter 4 software, enabling enhanced navigation capabilities.
In the realm of marine electronics, a fascinating debate has arisen between the Raspberry Pi 4 and the newly-released Raspberry Pi 5 for NMEA 2000 networking applications. Let's delve into the key differences and considerations when choosing between these two powerful single-board computers (SBCs).
### Raspberry Pi 4 vs Raspberry Pi 5 for NMEA 2000
When it comes to **Processor and Performance**, the Raspberry Pi 4 boasts a quad-core ARM Cortex-A72, running at 1.5 GHz, while the Raspberry Pi 5 promises a more powerful, faster CPU with a higher clock speed and superior architecture.
Regarding **CAN Bus Support**, neither the Raspberry Pi 4 nor the Raspberry Pi 5 feature native CAN controllers. Instead, they rely on external CAN HATs to interface with NMEA 2000 networks. However, the Raspberry Pi 5 may offer better performance due to its enhanced I/O capabilities.
In terms of **Networking**, the Raspberry Pi 4 offers Gigabit Ethernet and USB 3.0 ports, while the Raspberry Pi 5 promises enhanced USB and networking capabilities.
As for **Price**, the Raspberry Pi 4 is typically more affordable, with prices ranging from $35-$55 depending on RAM, whereas the Raspberry Pi 5 is expected to be slightly higher, around $50-$70, due to its new generation.
### Cost Analysis
For **cost-sensitive projects** and proven community support, the Raspberry Pi 4 with a standard CAN Bus HAT is a reliable option. On the other hand, for **more advanced or future-proof setups**, especially if needing higher performance or better integration, the Raspberry Pi 5 combined with a MacArthur HAT can provide enhanced capabilities at a higher price.
### CAN Bus HAT Options for NMEA 2000
There are two primary CAN Bus HAT options for Raspberry Pi: the budget-friendly CAN Bus HAT and the MacArthur HAT, specifically designed for marine applications. The CAN Bus HAT provides a CAN interface via SPI and is used to connect Raspberry Pi to NMEA 2000 networks through a CAN transceiver. It is a common, affordable choice, typically costing between $20-$40.
The MacArthur HAT supports CAN bus protocols out of the box and often includes additional connectors compatible with marine networks. Its specialized functionality comes at a higher cost, reflecting its unique features.
### Summary
While both models require external CAN HATs to interface with NMEA 2000 networks, the choice depends on your performance needs and budget. The Raspberry Pi 5's improved CPU and I/O may offer smoother data handling on busy marine networks, but the Raspberry Pi 4 remains a cost-effective and mature platform for NMEA 2000 applications.
For a comprehensive guide on setting up NMEA 2000 networks, making cables, and connecting to a Raspberry Pi 5, check out the latest tutorial from The Low-Cost Sailor (
For those interested, the Low-Cost Sailor's channel offers Patreon support (
When looking for components, the Raspberry Pi 4 and Raspberry Pi 5 purchase links, NMEA 2000 cables, 5-Pin M12 Connectors, CAN-BUS HATs, and the MacArthur HAT can be found on various online stores, including OpenMarine () and Tiendatec (). Additionally, all necessary components (Case, SD card, Raspberry Pi) can be purchased from the online store (). Diagrams for connecting equipment using the Mac Arthur HAT and the super economical CAN-BUS HAT are shown in the video.
For those seeking a case to fit the Raspberry Pi (4 or 5) along with the Mac Arthur HAT, visit the website (), or download the 3D model for self-printing. Pre-printed cases are also available for purchase on the same website.
A 12v power module for the Mac Arthur HAT can be purchased from OpenMarine (
Donations can be made to the website (). For more information on marine electronics and projects, visit the Low-Cost Sailor's YouTube channel (
The discussion on marine electronics also encompasses the use of a wind turbine, with the Low-Cost Sailor mentioning a potential low-cost WiFi + NMEA 2000 Wind Turbine System, albeit not detailed in a specific video. Furthermore, the realm of data-and-cloud-computing finds its place in marine applications through the integration of Raspberry Pi devices with various gadgets such as wind turbines, enabling access to data from anywhere.
