grodansparadis / vscp-p1-pulse-interface

P1 interface for smart meters to computer

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vscp-p1-HAN-interface

HAN P1 interface for smart meters to serial TTL. Should work with

Meters
Sagemcom T211 / Ellevio & Skånska Energi
Landis+Gyr E360
Itron A300 / Borås Elnät
S34U18 (Sanxing SX631) / Vattenfall
KAIFA MA304H4E / Nacka Energi (Not D version which is modbus)
KAIFA CL109 / Öresundskraft
Kamstrup w/ HAN module / Trollhättan Energi
and more.

There is a description here about my setup.

The PCB, assembled or bare, can be bought from https://frogshop.se/

Bare PCB or mounted PCB is available from THE VSCP shop.

Schema rev A

PCB P1 Interface card

Interface card for P1 based smartmeter to TTL serial interface.

BOM

Component Description
R1 Resistor 4.7K 0805
R2 Resistor 10K 0805
T1 NPM Transistor BC847
J1 RJ11 Modular connector (Amphenol 54601 or similar)
J2 6-pin pinheader 2.54 pitch
J3 2-pin pinheader 2.54 pitch

J3

Strap pins t use if the HAN interface does not provide power by itself.

J2 Connections

Pin Description
1 +5V
2 +3.3V or 5V *
3 +3.3V or 5V *
4 Not Connected
5 RX (Received data TTL level)
6 GND
  • Use same power on 2/3 as the serial interface the unit is connected to.

Connecting

To connect the interface to a HAN P1 port a serial TTL interface is needed. We describe using an USB to serial adapter here but an Arduino or ESP8266/32 or similar can also be used.

First connect the interface to the serial adapter

Interface TTL adapter
1 +5V
2 3.3V
3 Not connected or 3.3V
4 Mot connected
5 RX
6 GND

The following two pictures mau be clearer

Now draw a standard six leads RJ12 cable from the HAN port of the meter and connect it to the interface.

The cable should have the same colors on both connectors (straight cable). Like this

It is OK to use a cable of a few meters. At least if you are in an environment without to much electric disturbance.

Now connect the TTL USB adapter to the serial port. The blue LED should light up on the USB TTL serial adapter.

If everything is correct the red RX LED will light up every ten seconds to show that data is received.

Now you are ready to go. More info is here on how to proceed.

About

P1 interface for smart meters to computer

License:MIT License