Difference between dsmr smartmeter and a dedicated p1-device Slimmelezer+

[digital willow]

Hi everyone, set up HA for the first time, through a raspberry pi. Reason is to manage my energy better, using power when my solarpanels produce enough & deliver to the grid. I directly plugged in a smart p1 cable from my Pi to the digital meter and set up dsmr smart meter. It 'works' can see some values, so jeej to me. But on the HA site you/they recommend a Slimmelezer + ("...We have worked with creator Marcel Zuidwijk to develop SlimmeLezer+. It’s an affordable P1 reader powered by ESPHome that will seamlessly integrate this information in Home Assistant. It is being sold on his website and the firmware is open source on GitHub.")

Just a small question, what are the biggest differences and why use 1 of both? I know, as a beginner, just start playing around with ha first and this was a quick way, but i am curious what are the pro's and con's. With kind reards, Florus.

And one more small question, how do i interprete the 0kwh i see at "Home"? Eventually i want to measure the Production from my Solar Panals, determine what i 'need in my HOME', and when i have overproduction ; do this, start HeatPump etc etc.

[errant orchid]

I would guess that's because all your energy (and then some) is being exported without any known source for it.

It would generally show (import + produced) - export

[rain mango]

the zuidwijk P1 meter uses esphome and connects through wifi. So it uses the DSMR integration inside esphome and then sends that data over wifi. Your current solution just used the built in DSMR integration in HA itself

both have their advantages and disadvantages, I also use the USB method

if you have something working I wouldnt change it

[digital willow]

But the 0kwh Home: it that information what currently uses power and can only me measured by another smartdevice, or plug that measures the power?
As stated, in the end i want to calculate the current “consumption” of power, measure the current production of my panels, and then give a trigger to start a Wasmachine or Heatpump etc etc, but only if there is more then enough production to the net. @errant orchid @rain mango
is this possible?
Edit: oke it seems i am using 1.1kwh in Home at night, because that is what I’m seeying now 0700am. Is there a way to measure this?

[rain mango]

Normally you can't measure what the home uses, but HA can calculate it from the other data

You are missing a solar production sensor

That's why it says the home is at 0 kWh

[digital willow]

Home shows 1.1kwh now, after 12 hours overnight.

[rain mango]

because you didnt have solar

[digital willow]

Oke I’ll add those and play with it some more. Thanks for all the answers.

[rain mango]

if you add the solar production sensor you should immediately see the correct data for home consumption because it is calculated on the fly

[digital willow]

Hi Stefan, small question. Im switching my ha setup to a beelink, in stead of a pi5. I can’t put the beelink near my p1 meter, so need to get a p1 meter. What do you recommend? There is slimme lezer+, home wizard enz enz. But is there something widely used? I would really want to do it right, at once (twice)…

[rain mango]

I would get the slimme lezer+. Works well, dutch made. And Marcel Zuidwijk @tight yarrow is a nice guy

I know many Dutch people use it as well with their P1 meter

[tight yarrow]

Ask any question you have 😌 I’ve designed my devices to send the raw data as is via telnet/tcp. don’t know beelink, but if it accepts serial over network than it should theoretically work. Otherwise you can like for dsmr2mqtt software (I’m not good in software so I can’t offer it).

[digital willow]

Is it oké I dm you @tight yarrow ?

[tight yarrow]

Sure

[digital willow]

And how does this work then? Can I add slimme lezer+ via an addon in ha? With the pi, I connected it directly to the p1 meter using a usb to p1 cable. And then using the dsmr addon in ha.