Victron Venus OS Large Node-RED: Setup and Troubleshooting

Key Takeaways

• Device instability often results from high CPU or memory load, especially on less powerful GX devices.
• Check your GX device model's processing capability if you experience reboots or slowdowns.
• Running both Node-RED and Signal K simultaneously can overload some GX devices, particularly the Venus GX.
• If issues persist after simplifying configurations, consider upgrading to a GX device with a faster processor.

Why is my Victron GX device rebooting or becoming unstable with Venus OS Large?

Your Victron GX device may reboot or become unstable when running Venus OS Large if it experiences high CPU utilization or runs out of memory. This condition is particularly common when running both Node-RED and Signal K server functionalities simultaneously on GX devices with slower processors.

Diagnosis: Identifying Venus OS Large Instability Causes

Follow these steps to diagnose why your GX device might be rebooting or becoming unstable:

1. Verify GX Device Compatibility and Processor Speed:

• • Check: Confirm your GX device model is compatible with Venus OS Large. Compatible devices include Ekrano GX, Cerbo GX, Cerbo-S GX, Venus GX, Octo GX, MultiPlus-II GX, and EasySolar-II GX. Raspberry Pi 3 and 4 are also compatible.
  • Observe: Note the processor speed classification from the manual: Ekrano GX, MultiPlus-II GX, and EasySolar-II GX are listed as "fastest processor." Cerbo GX is "second-fastest processor," and Venus GX is "slowest processor."
  • Meaning: Devices with slower processors are more susceptible to overload. The Color Control GX (CCGX) and CanVU GX are not able to run Venus OS Large.

2. Evaluate Simultaneous Service Usage:

• • Check: Determine if both Node-RED and Signal K server are enabled and actively running on your GX device.
  • Observe: Pay particular attention if you are using a Venus GX. The manual states that "Running both Signal K and Node-RED at the same time will very likely overload the device and may result it in becoming unstable."
  • Meaning: If both services are active on a Venus GX, this is a highly probable cause of instability.

3. Review Node-RED Flow Complexity:

• • Check: If Node-RED is active, examine the complexity of your configured flows. Highly complex or frequently executing flows can consume significant CPU and memory resources.
  • Observe: Look for flows that involve frequent data polling, complex calculations, or numerous external API calls.
  • Meaning: Overly complex Node-RED configurations can contribute to system instability, even on faster GX devices.

Cause and Fix Table

Understanding Venus OS Large Features and Access

Venus OS Large extends the capabilities of your Victron GX device by integrating powerful tools for automation and data management.

Node-RED: PLC-like Programming

Node-RED offers a browser-based editor that functions as a PLC-like programming environment. It allows you to visually wire together hardware devices, APIs, and online services. This enables custom automation flows for your solar system.

• Accessing Node-RED: You can access the Node-RED interface from a web browser.
• • Use the local network address: https://venus.local:1881
  • Alternatively, use the device's IP address: https://192.168.178.224:1881 (replace with your device's actual IP)
  • Node-RED also includes a fully customizable dashboard, which can be viewed locally or remotely via the VRM Servers.

Signal K Server: Marine Data Integration

The Signal K server is an application designed to run on a central hub, in this case, a Victron GX device. It provides a universal data exchange format for marine vessels.

• Accessing Signal K: You can access the Signal K server from a web browser.
• • Use the local network address: http://venus.local:3000
  • Alternatively, use the device's IP address: http://192.168.178.224:3000/ (replace with your device's actual IP)
• Signal K Features:
• • WiFi navigation and AIS data server: Integrates with charting apps such as iSailor, Navionics, iNavX, and Aqua Map.
  • Anchor alarm: Provides a robust anchor alarm system.
  • Automatic log book: Automates the logging of vessel data.
  • Marine instrumentation package: Serves full-featured marine instrumentation, compatible with apps like iOS WilhelmSK App or KIP.

Safety: Software Configuration and Device Stability

While Venus OS Large primarily involves software configuration, ensuring system stability is crucial for reliable energy management. Overloading a GX device can lead to unexpected reboots, which might interrupt critical monitoring or control functions. There are no direct electrical safety concerns related to Node-RED or Signal K operation itself, but maintaining a stable GX device ensures your overall Victron system operates as intended.

When to call a technician instead

If your GX device continues to experience reboots or instability despite simplifying Node-RED flows and managing Signal K usage, especially after considering the processor capabilities of your specific GX model, it may indicate a deeper hardware issue. If you are unsure about modifying system settings or if the problem persists, contact a qualified Victron Energy installer or technician. They can perform advanced diagnostics and ensure your system is configured optimally.