On 15/11/2020 13:54, Adrian wrote:
In message , Theo
writes
Roger Mills wrote:
You can buy energy monitors which either use a clamp sensor round one of
the meter tails or count flashes on new-type meters. But they only
appear to give instantaneous readings and daily totals.

Does anyone know of anything more granular - preferable with the ability
to capture the data and insert it into a spreadsheet? Sounds maybe like
a Raspberry Pi application?

https://openenergymonitor.org/
does it on a Pi, and will sell you the parts need to hook up to your
meter
for not-very-much.


Looks interesting, but (so far as I can see) only works for electricity
metering, not gas.

Given that I don't have a power socket next to the meter, and I've
already got several Pis running, would it be feasible to get the sensor
head, and use the wireless to talk to an existing Pi ? (the site
suggests it might be)

could probably get just a sensor head and extend the cable to wherever
you can do voltage sensing
Or add a pi zero w, plus some a to d hat, and a power supply.
the typical a to d is two channel, so use other channel for voltage
sensing. Probably use a small mains transformer to step down mains to
provide voltage sense...
Pi zero W would hook into the wi-fi and be a server on the network - so
write your own web app....or simply poll it for 'last 5 minutes data' etc.


Adrian


--
"A point of view can be a dangerous luxury when substituted for insight
and understanding".

Marshall McLuhan