question

Warwick Bruce Chapman avatar image
Warwick Bruce Chapman asked

Error installing node-red-contrib-modbus

Hey Team

We're trying to do Fronius inverter control with Node-RED. It works fine as long as we're on grid with the Victron pallete but when we're on generator and trying to control the Fronius, it seems to ignore attempts to disable PV inverter (VE.Bus control) or set inverter power to 0W (PV Inverter control).


We thought we would try Modbus TCP commands but the pallete does not install.


I'm not clear on how much we can and can't ask from Victron about Node-RED, so I err on the side of asking :P

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FroniusNode-RED
1669362585423.png (875.1 KiB)
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1 Answer
nickdb avatar image
nickdb answered ·

It looks like an issue with their package, I can't install it either and it seems to fail when the package manager fails to find a file in the repository.

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johnny-brusevold avatar image johnny-brusevold commented ·

@Warwick Bruce Chapman @nickdb

node-red-contrib-modbus installs fine here on venus-os 3.00~4

tested first in terminal with

npm install -g node-red-contrib-modbus (no error)

Then from node-red web intreface (no error)


1 Like 1 ·
nickdb avatar image nickdb ♦ johnny-brusevold commented ·

except he is trying to install node-red-contrib-fronius-solar

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johnny-brusevold avatar image johnny-brusevold nickdb ♦ commented ·

@nickdb

node-red-contrib-fronius-solar also installs fine

But you must have git installed

opkg update

opkg install git

then install palette from node-red web-interface

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nickdb avatar image nickdb ♦ johnny-brusevold commented ·
Once adding git with the above commands, it installs fine. Just takes a bit of time.
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Warwick Bruce Chapman avatar image Warwick Bruce Chapman johnny-brusevold commented ·
Thanks. After installing git, it worked on
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Warwick Bruce Chapman avatar image Warwick Bruce Chapman nickdb ♦ commented ·
Ah, sorry wrong screenshot. I tried both and they both failed.
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