I use WaterP1MeterKit V2. I bought it a week ago to test, and I like it. It’s one of the best 2-in-1 solutions on the EU market. Compared to many others, it is a turnkey solution, and integration with HA is super easy.
Hi Fenix_Inc, Can you tell a little bit more about your experience with the WaterP1MeterKit. I intend to buy the device since it ticks all the boxes for me, but can’t find a credible review online, apart from their own marketing department.
Thanks!
For people using Smarty meters in Luxembourg.
I tested two different units from smartgateways.nl, on two different Smarty meters. In both cases, the device doesn’t boot by itself when powered from the P1 port. It needs external power from a USB battery or USB power adapter. This is annoying as it also shuts down from time to time, and needs to be restarted.
The SlimmeLezer+ works without issue on both meters. Clearly the ESP32 in the smartgateways device uses more power than the P1 port provides, while the ESP8266 is OK.
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same experience here.
ESP32 from smartgateways can not startup from P1 power only.
It needs a seperate external USB power supply. Strange thing after 30 minutes or so you can unplug the external power supply and it keeps running from P1 power. (This both for ESPHome firmware are smartgateways own firmware).
Looks like indeed their ESP32 (WROOM) draws more power and is unable to startup.
Another member here on the forum opened up the SmartGateways P1 meter and there is only 1 resistor on the PCB, so no capacitors, etc…
It’s just a simple nodeMCU (ESP32 WROOM) board directly connected to the RJ12 port of the P1.
look here: Slimmelezer hardware design (ESPHome DSMR) available? - ESPHome - Home Assistant Community
So no seperate power circuit. Indeed other P1 meters use the ESP1 or ESP8266 chips which require less power, or even lower 3.3V voltages causing it more stable with a 5V to 3.3V regulator and power supply stablilizations.
Sure. Generally, it is exactly as described on their website. I live in the Netherlands, and the company is also located there. Delivery was made approximately one day after order confirmation. If you order a WaterP1MeterKit, they ask for a photo of your water meter before confirming the order to ensure compatibility.
I ordered the WiFi version. Device based on ESP Home. Configuration is easy, almost plug-and-play. It provides rich data, mostly based on your smart electrical meter.
It is my type of data
What I don’t like so far is that there is no security for the admin panel for the device. It is passwordless. Not critical for me, but an area for improvement.
Just ask what you’re interested in, I try to help.
Thanks for reply. Indeed I have a few more practical questions:
- How have you prevented the admin panel from getting exposed?
- I’m going to experiment with the LAN version. Is it possible to switch to WIFI and keep powering over eth (I believe it is a matter of updating the firmware)?
- Is extra power needed, or is the power supplied via the P1 port enough for the device to function properly (esp. startup)?
- I believe the watermeter only measures flow of water. Have you set the total meter value once in HA after installation, so you know total usage when asked for by water service company? Is it accurate?
- Have you tried humidity / temp sensor?
Thanks again for taking the time to answer my questions!
It is in a separate network for IoT with some restricted access to the Internet. From the admin panel, you can see your data and real-time logs, and can upgrade the firmware. Nothing super critical)
Yes, HW is the same. It is just switching firmware to change the Wi-Fi or Ethernet.
I use Wi-Fi now because I don’t have a PoE on my LAN. Generally, for Wifi version - power via type - C USB, for LAN - only PoE as I understand from docs.
For WaterP1MeterKit - yes, always because of Watermeter.
It measures water flow based on the movement of some parts of your physical water meter. All the others are doing the same. There is no magic.
It supplies 2 metrics by default - Water Current Usage (L/m) and Water Total Consumption (m3).
With Water Total Consumption, I found a small problem: it resets the data to 0 m3 on the sensor if the device is disconnected or switched on/off. But it doesn’t bother me, because HA remembers all statistics, and you can see it through the dashboards.
There is no counter for total water consumption in liters like in analog water meter, but you can easily do it inside HA. Here is guidance - Counting water usage with the Watermeterkit
And yes, if you install it correctly, it is pretty accurate.
It is just there. It shows me temperature and humidity inside my metercast )))) It looks real; I just briefly compared it with the external sensor.
With no problems, you can easily integrate it to HA and to Energy Dashboard.
Excellent, thank you very much for your informative answers, very helpful !!
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