Multiple apartments

Hi!
New here. Would it somehow be possible to monitor 20-25 apartments using pulse readouts?

Thanks

I’m afraid the emonTx/emonPi can only handle a single pulse input per unit therefore you would need 25 separate units.

Could you use CT’s and use an IoTaWatt that has got 14 channel CT inputs?

https://shop.openenergymonitor.com/iotawatt-wifi-connected-14-channel-electricity-monitor/

Yes, but not “out of the box” with OEM stuff as Glyn says. You could connect multiple pulse counters to a Raspberry Pi directly (not an emonPi), it’s been a long time since I studied the GPIO on a Pi, but if you could free up 20-25 pins it would be fairly straightforward, I think 20-25 is pushing it for one Pi but I think 2 Pi’s (even 2 zero WiFi’s) would easily be ample. You might be able to use an IO expander to keep it on one Pi, but I’m not familiar with using them.

Here’s a post where I have connected 2 optical pulse counters to one Pi, but the code is scale-able and there was plenty of GPIO pins left over. (see Directly connecting to Optical Pulse Counter with RPi? - #2 by pb66)

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