Hello group,
Can anyone help me out on why dynamo is not reading EPW file for any location. I am using Revit 2024 and i am downloading weather data file from EnergyPlus. There is data in the file which i can see it any text editor. But when i am importing it in dynamo, it is giving me null values for all parameters in SunPath node.
Thanks in advance.
Look at the format, it looks like a csv file
Can you show us what you have? Make sure node preview bubbles are pinned and your entire graph is legible.
This is the part where i am facing issues. I have long script before these nodes and all working fine. I am trying to give SunPath to the building facade so that they can work automatically based on sun conditions. Let me know if you need to see whole script for this.
Those are both custom nodes so you’ll have to share the package name and confirm that they’re working first. Does Import Location return anything? Have you tried recreating the functionality of reading the location from the file? Does the custom package have any other required packages that you’re missing? (IronPython2.7 is a common one.)
I have installed IronPython2.7 & IronPython3 and tried to run it again but it is still not giving any values. The package is Ladybug and import location also giving null value even after trying with different location’s EPW file. I am not aware how to make sure package is working or not.
Thank you.
If you are using ladybug package that hasnt been supported since revit 2019. I believe the epw node nulls out since 2020 onwards.
Some users have tried developing nodes and packages to fix it, but most users ended up moving on to rhino inside/grasshopper and sometimes pollination as well to run these types of studies.
Is there any other way to give solar data through dynamo only?
Yes you can access it from native revit solar data.
Note that this workflow uses IronPython so you will need the ironpython2.7 package as datetime kinds do not seem to work in cpython3, at least easily.
I have a tutorial that demonstrates this:
You can also look invo VASA/voxels but I’m not as familiar with it and find raybouncing easier to apply. It’s also moreorless how Laydbug does it.
I have watched your tutorials and it is really helpful. I am trying to make Al Bahar panels work automatically based on sun conditions which you have done through Rhino/Grasshopper as i don’t have access to that. I am beginner in dynamo and I will really appreciate your help.
So you want to adjust the panels based on the angle of the sun?
The Dynamo Primer has that as a literal exercise so you’re in luck!
I recommend you at least read though if not follow the exercises for all the proceeding content, but you can skip to the Dynamo for Revit if you’re feeling brave. If a step doesn’t make sense check the previous chapters as the answer is likely therein.
