This library provides custom Node-RED nodes for some of the most commonly used Victron Energy products. The aim is to make it easier and faster for users to create automations for and around a Victron system, without actually having to touch any of the devices' internals.

When Node-RED is started, a Victron Energy configuration node is automatically created, connecting to the dbus in the GX device. All the node services and measurements can be found on services.json and on the wiki -- however only those services and measurements that are available in the system are shown in the node edit panel.

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The input nodes have two selectable inputs: the devices select and measurement select. The available options are dynamically updated based on what sort data is actually available on the Venus device dbus.

Input Nodes have the same options available, but the selectable 'measurement' only lists writable services. Additionally, the user can set an initial value to the service, which is sent whenever the flow is deployed.

There are 2 custom nodes. An input and an output node. The input node allow to read from and the output node allows to write to all found dbus services and paths. This obviously comes with a risk, as not all services and paths are supposed to be written to. So only use the custom output node if you have read the documentation and know what you are doing. Also note that used services and paths might change, so there is no guaranteethat a node will remain functional after a Venus firmware update.

All the individual nodes (inputs / outputs) will use a singleton instance of a Victron Config Node to access the system dbus in a Venus device. The nodes will provide an easy-to-use interface for accessing various measurements and writing data to the system.

Upon initialization, the Victron Config Node initializes a VictronClient and SystemConfiguration instances. VictronClient connects to the Venus D-Bus and starts maintaining a cache of available services.

NOTE: these instructions are about how to install and make this node pallette working on your own Node-RED installation. Make sure that is what you want and need. The more common solution is to use Node-RED already pre-installed inside Venus OS.

WARNINGS: (A) Only do this on a trusted network. Exposing D-Bus to TCP is not secured - anyone on the same network can doanything he/she wants after enabling this setting. (B) If you do below change incorrectly, the GX Device will no longerboot correctly and will also not enable SSH nor Remote Console anymore. Also the GUI won't work; nor will anything else.Basically its rendered unusable, until either debugged via the serial console using aserial console cable; or reinstalled using an factory installation image on ansdcard. Note that after factory installation, certain files must be put back in order for, for example, the wifi towork again. There is no complete documentation about how to restore those, but the information on older revisions of this page will at least help:Venus OS Extended manual - Repart. appendix.(C) below modifications are on ones own risk. We'll help where possible; but there are only a fewpeople available within Victron that can help; and they won't be standby all the time to help with issues like this:only do this when you (I) are not in a rush when it goes wrong and (II) are technical and know what you are doing. Toget help, you could try the issues, as well as theModifications section on Community. (D) Remember that a firmware update of the GX device will override below advised (and any other) changes to the rootfs.

With all those (important!) warnings out of the way, here are the steps to locally install Node-REDand thisplug-in. As well as the step to Open up the GX device, so that it can be communicated with remotely by thisnode-red plugin:

Set the dbus service com.victronenergy.settings, path: /Settings/Services/InsecureDbusOverTcp to1:dbus -y com.victronenergy.settings /Settings/Services/InsecureDbusOverTcp SetValue 1 and rebootthe Cerbo (the dbus needs to be restarted)

All the nodes use a manually generated services.json file to figure out what dbus services and paths to expose to the end-user. This file is used to e.g. render the labels to the 'Select measurement' dropdowns in node-RED's edit view. Please note, that this file is not a full representation of all available dbus paths -- rather, a subset of services and paths that the node-red nodes actually use.

This services.json file is generated using the parse-services.js script in ./scripts directory. The script uses two CSV files, dataAttributes.csv and dataAttributeEnums.csv, as its primary source to generate an up-to-date listing of available dbus services and dbus paths for Victron Energy's devices.

(Unfortunately, the CSV files are not committed to the repo for now -- if you need to update the services.json, please ask for the CSVs from Victron Staff or run the parse-services script with the --append switch).

The parsed services and paths are filtered against a whitelist (service-whitelist.js) before saving the file in order to get rid of undesired or deprecated dbus paths and only reveal the paths actually relevant to the VE nodes.

A few modifications to the code are needed in order to add new nodes (or new paths to existing ones). Here's an example on how to add a new input node victron-test. It uses the dbus service com.victronenergy.settings and has one option for a path /Settings/TestDbusPath.

You can use the --append switch to completely bypass the whitelist, missingpaths.json and csv parsing. This is useful if you don't have access to the CSV files. This will simply merge the given input json file with the existing services.json: node parse-services.json ./additionalPaths.json --append.

Regularly, you'll need to check if its time to update dependencies. A crude way isto remove all version locking files, and also remove the node_modules folderitselves as npm install will not touch any already installed dependencies, and thenrun npm install. In other words, do this:

Note that above only updates the depedencies as allowed per rules definied in package.json.To really update them, ie. check for newer, possibly breaking versions, something elseis needed. That can for example easily be checked withnpm-check-updates. Here isan example output:

npm-shrinkwrap.json is exactly the same file, with same effect, but a different purpose:the recommended use-case for npm-shrinkwrap.json is applications deployed through thepublishing process on the registry: for example, daemons and command-line tools intendedas global installs. More about that here: -npm/npm-shrinkwrap-json

Note that some repos/packages have a package-lock.json in their repo, and others do not.For node-red-contrib-victron for example we do keep that. But Node-RED and signalk-serverdon't have that, and they don't publish a npm-shrinkwrap.json to the NPM registry either.Neither do we for node-red-contrib-victron by the way.

Careful, that must be done on a repo having a package-lock.json. Which for signalk-serverand Node-RED means you need to run npm install --only=prod before you can make ameaningful npm-shrinkwrap.json. 152ee80cbc

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