SmartHomeShop Docs

FAQ

Find answers to common questions about the P1SplitterKit.

General Questions

1. What is the P1SplitterKit?

The P1SplitterKit is a hardware device that splits your smart meter's P1 port into 5 output ports, allowing you to connect multiple devices to read your energy data simultaneously.

2. Does the P1SplitterKit require software or WiFi?

No. The P1SplitterKit is a pure hardware solution: no software, no WiFi, no configuration needed. Just plug in and go.

3. Does the P1SplitterKit store or process any data?

No. The P1SplitterKit simply passes through the data signal from your meter to all connected devices. It doesn't store, process, or transmit any data.

Compatibility

4. Which smart meters are compatible?

The P1SplitterKit works with smart meters that have a P1 port: DSMR 2 to 5 and ESMR 5.

5. Will it work with Belgian smart meters?

Yes. The digital meter in Belgium has a P1 port too. You usually have to ask your grid operator to open the P1 port first.

6. Which devices can I connect?

Any device that reads P1/DSMR data via RJ12:

  • SmartHomeShop P1MeterKit / WaterP1MeterKit
  • HomeWizard P1 Meter
  • Solar inverters with P1 input
  • DSMR Reader software (via serial adapter)
  • Energy management systems

7. Can I connect more than 5 devices?

The P1SplitterKit has 5 output ports. Need more? Then use several P1SplitterKits in series, thanks to the built-in signal amplification.

Power Questions

8. Do I need a USB-C power adapter?

It depends:

  • DSMR 5 meter with one device: the P1 port is usually enough
  • DSMR 4 meter or older, or 2 or more devices: use USB-C power
  • When in doubt, use USB-C power for best reliability

9. What does the power switch do?

The switch selects the power source:

  • Left position: Power from P1 port only
  • Right position: Power from USB-C (required)

10. Can I use any USB-C adapter?

Yes, any standard 5V USB charger of at least 1 A will work. Most phone chargers are sufficient.

Signal & Data

11. Is there any data loss when using the splitter?

No. The P1SplitterKit uses hardware signal amplification to ensure all 5 outputs receive the full, unmodified data signal.

12. How long can the cables be?

  • Up to 5 meters: Standard RJ12 cables work fine
  • 5-15 meters: Use quality shielded cables
  • 15+ meters: May experience signal degradation

13. Do all devices receive data at the same time?

Yes. All connected devices receive the same data signal simultaneously.

14. What baud rate does the P1SplitterKit support?

The P1SplitterKit passes through whatever baud rate your meter uses, typically 115200 for DSMR 4 and 5 and 9600 for older versions. Every output has its own active amplifier.

Installation

15. Where should I install the P1SplitterKit?

Install it near your smart meter for the shortest cable run. The included 1-meter cable connects to your meter.

16. Can I mount it on the wall?

The P1SplitterKit doesn't include mounting hardware, but it's light enough to hang by its cables or you can use adhesive strips/velcro.

17. Which cable goes where?

  • P1 IN (on the right): Connect to your smart meter
  • OUTPUT 1-5: Connect to your devices (any order)

Troubleshooting

18. The Power LED is off

  1. Check the power switch position
  2. If using P1 power: Your meter may not provide enough power. Switch to USB-C
  3. Verify the RJ12 cable is fully connected to the meter's P1 port

19. Data LEDs are not flashing

  1. Data LEDs only flash when a device requests data
  2. Check if your device is powered on and configured correctly
  3. Try connecting the device directly to the meter to verify it works
  4. Check your RJ12 cable connections

20. One device works but another doesn't

  1. Try swapping the devices between ports
  2. Try a different RJ12 cable
  3. Some devices may need specific configuration for DSMR version

21. My devices worked directly but not through the splitter

  1. Switch to USB-C power mode
  2. Ensure all cables are fully inserted
  3. Try disconnecting other devices to isolate the issue

Purchasing

22. What's included in the box?

  • P1SplitterKit main unit
  • 1× RJ12 cable (1 meter)

There is no printed quick start guide included anymore. Scan the QR code on the inside of the box for the latest online manual.

Additional RJ12 cables and USB-C adapter are not included.

23. Where can I buy additional RJ12 cables?

Your devices usually come with their own cable. We sell an RJ12/P1 cable of 1 or 2 meters ourselves. Standard RJ12 6P6C cables are also available from electronics stores and online retailers.

24. How much warranty do I get?

You get a 2-year warranty on the P1SplitterKit. Keep your proof of purchase and report a fault through our Support Portal, and we will find a suitable solution together. You also have 14 days to change your mind.

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