[Also see the “ US split phase monitoring requirements ” thread, separated from this thread to keep both linked discussions on topic - Mod] Working on a pretty massive setup. For now I’d like to do 16 channels on one hub and 6 more with an emonTx connected to an emonPi. I’d prefer to use wired conn…

Hi John, Welcome aboard! [image] TheSHAD0W: For now I’d like to do 16 channels on one hub Sounds like you may be a little confused. emonHub is software. Could you elaborate a little on what you mean by “16 channels on one hub?” [image] TheSHAD0W: am I right that there are only two rad…

[image] TheSHAD0W: #Can I hang 4X emonTx via wire on one emonPi/Base? Yes! You can easily just add 4 emonTx via usb-serial adaptors direct to the 4 accessible USB ports (more is you introduce one or more usb hubs!) See the Does the emonTx Shield need an actual Arduino? thread for an example…

[image] pb66: Plus you get the added advantage of not powering the emonTx via the AC:AC adaptor which can result in better accuracy Erm… That’s open to question. Accuracy at the top end of the scale shouldn’t be affected, provided that calibration has been carried out using that supply. This…

[image] Robert.Wall: Erm… That’s open to question. Just offering options and my own opinion. There are so many different permutations of PSU (PSU +USB lead?), USB adapter (and lead?) that I’m sure there can be both better and worse results. I have always had good results, but that said I do…

All are Megni Shop (OEM) devices. [image] pb66: I know I would want 4 AC:AC (+ 1 AC:DC) adaptors if I could get away with 1 or 2 AC:AC (+ 1 AC:DC) adaptors. You meant wouldn’t want? Provided that all the emonTx’s have a common GND, and all have the JP2 link removed, then it’s OK, and probab…

[image] Robert.Wall: You meant wouldn’t want? Indeed I did (now corrected to avoid confusion, thanks) [image] Robert.Wall: But I do know that the Shop USB lead is (was?) a particularly high resistance specimen, I don’t know if that has changed since I measured one. Yes, and we have di…

[image] pb66: If you decide to go the USB route there are some pointers I can give you specifically regarding running multiple usb emonTx’s that may not be obvious from the many posts on connecting or configuring a single emonTx this way. Yes please.

So, my current plan is to have two emonHub devices (not emonBase, sorry @Bill.Thomson ), with four emonTx devices connected to one and two to the other. (For one I could use a single emonTx and an emonPi, I think, but for Reasons I’d rather do it this way.) So I’ll need two hubs, six tx’s, and six …

[image] TheSHAD0W: So, my current plan is to have two emonHub devices (not emonBase, What are you calling an emonHub device? Do you just mean a raspberry pi without an emonPi or RFM2Pi add-on board? I would still regard that as an emonBase. I have several RPi’s that have USB connected emonT…

Oh! And another consideration for USB connected emontx’s if using the default FW’s. I believe it is considered risky to operate the emontx with no antenna attached. This is not something I’ve had to consider since i have always used my own FW with the rf stuff removed/disabled. Side note! - I reall…

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Can I hang 4X emonTx via wire on one emonPi/Base?

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