Archived Forum

I want to monitor individual electric circuits.

No problem, you can pretty much monitor any individual circuit that you can clamp a CT around (individual conductors)

Does all equipment work in USA?

Regarding the hardware it's mainly only the mains adapters that differ, so generally yes.

There have been a couple of reports of the CT's not being big enough to accommodate the main incoming cables but that's unlikely to be the case for individual circuits.

How many emon tx 3 can be used with one raspberry pi?

Emoncms is by default limited to 32 nodes because the RFM devices are limited to 32 available node ID's. A local emoncms can be set to accept any number of nodes so you could have multiple RFM networks if you needed more than 32 nodes.

If running a large number of nodes on one network you will possibly suffer from some lost packets through RF collisions unless you implement some sort of synchronization to spread the TX times.

Is all the software included to monitor circuits?

There is a lot of software for many different applications, it is all open source and freely available. Some will need "adjusting" for USA voltage and maybe tailored to your requirements, for example allocating a different node ID to each node, so I would recommend getting a programmer with your kit.

The emonTx v3 comes preloaded with a standard working sketch that has a node ID of 10. 

The RFM2Pi also is also preloaded and ready to use.

There is also a pre-loaded SD card available for the Pi that has emonHub and an optional low-write version of emoncms installed.

Paul