SmartHomeShop Docs

Installation Guide

This guide walks you through connecting your P1SplitterKit to your smart meter and devices.

Before You Start

You'll Need

  • P1SplitterKit
  • RJ12 cable (1× included for meter connection)
  • Additional RJ12 cables for your devices (not included)
  • USB-C power adapter of at least 1 A (needed for DSMR 4 and older, and from two devices)

Check Your Meter

The P1SplitterKit is compatible with DSMR 2 to 5 and ESMR 5 smart meters. Look for the P1 port on your meter: it's usually labeled "P1" and uses an RJ12 connector.

Step 1: Connect to Smart Meter

  1. Locate the P1 port on your smart meter
  2. Connect the included RJ12 cable to the meter's P1 port
  3. Connect the other end to the P1 IN port on the right of the P1SplitterKit

Tip: The RJ12 connector clicks into place. Pull the tab to release.

Step 2: Select Power Mode

The P1SplitterKit has a power mode switch on the side:

Switch Position Power Source When to Use
Left P1 port only DSMR 5 meter with one device
Right USB-C required DSMR 4 and older, or two or more devices

When to Use USB-C Power

Use USB-C power if:

  • Your meter is DSMR 4 or older
  • You're connecting 2 or more devices
  • Devices aren't receiving data reliably
  • The Power LED is dim or flickering

Note: The P1 port only supplies about 250 mA and the splitter itself already uses most of that. On USB-C the splitter does not depend on the P1 port.

Step 3: Connect Your Devices

  1. Connect your devices to any of the 5 OUTPUT ports
  2. Use standard RJ12 6P6C cables
  3. The order doesn't matter: all ports are identical

Cable Length Recommendations

Distance Recommendation
Up to 5m Standard RJ12 cable
5-15m Quality shielded cable recommended
15m+ May experience signal issues

Step 4: Verify Operation

Check the LEDs

LED Status Meaning
Power LED Solid Power OK (P1 or USB-C)
Power LED Off/Dim Check power source
Data LEDs (1-5) On or flashing The device on that port is requesting data
Data LEDs (1-5) Off No device connected or no data request

Normal Operation

  • Power LED should be solid
  • Data LEDs flash when connected devices request data
  • Most devices request data every 1-10 seconds

Troubleshooting Installation

No Power LED

  1. Check the power switch position
  2. If set to P1: Try switching to USB-C mode and connect a USB-C power adapter
  3. Verify the RJ12 cable is fully inserted into the meter

Data LED Not Flashing

  1. Verify the device is powered on and configured
  2. Check the RJ12 cable connection to the device
  3. Try a different output port
  4. Try a different RJ12 cable

Device Not Receiving Data

  1. Check all cable connections
  2. Verify your device supports DSMR (P1) protocol
  3. Try connecting the device directly to the meter (bypass splitter) to verify it works
  4. Switch to USB-C power mode if using P1 power

Installation Examples

Example 1: One Device on a DSMR 5 Meter (P1 Power)

Smart Meter P1 → P1SplitterKit → P1MeterKit
  • Power switch: Left (P1)
  • USB-C: Not needed. Add a second device and you switch to USB-C

Example 2: Multiple Devices (USB-C Power)

Smart Meter P1 → P1SplitterKit → P1MeterKit
                              → WaterP1MeterKit
                              → Solar Inverter
                              → DSMR Reader
  • Power switch: Right (USB-C)
  • USB-C: Connected to a 5V adapter of at least 1 A

Next Steps

  • Your devices should now receive data from the smart meter
  • Configure each device according to its own documentation
  • For SmartHomeShop devices, see their respective installation guides

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