Max number of nodes

Hardware diyBMS
1

hi all just out of curiosity what is maximum nuber of nodes i could have on one master controler and will adding more nodes make data requests slower

2

By “Master Controller” you mean an EmonPi?
If so, the default is 32 nodes, though this can be expanded via a parameter.

However, do you mean the maximum number of nodes transmitting via RFM69 modules? Or the maximum number of inputs? Or for that matter, the maximum number of feeds?

I have nodes (but fed via MQTT) that have 60+ inputs. These have maybe 70+ feeds.

3

The original post is tagged “diyBMS” - so I thought Sam did not mean the emonPi. But then, the main components of the BMS are Controllers and Modules.

And welcome, Sam, to the OEM forum. I think you need to explain a bit more what you want to know.

4

hi there ye sorry i was in a little rush when puting the original post up
now by master conterler i am refering to the esp32
and by nodes i am meaning the modules that go on each cell
and by max number i am meaning whats the limit of the nodes i could go up to (so for instents 4s would mean 4 nodes and one esp32)

5

You had us confused there…
This is a question for @stuart or @atanisoft I think.

6

Each Esp32 controller can support up to 128 battery modules.

7

thank you for the infomation