Norwegian AMS power meter sensor/adapter for MySensors and controlers like Domoticz

Implemetation of sensornode for Mysensor, a parser that read OBIS codes and meter data from the HAN port of a Norwegian Aidon power meter. Can run on and a 8 mHz low power Ardino.

Tested on a Hafslund and on Eidsiva power meter

The parser decode a Mbus datastream according to the Norwegian HANcode specification - OBIS codes. This adapter is relativ generic, independent of the order and content of each message and record.

Specification:

Ref https://www.nek.no/wp-content/uploads/2018/11/Aidon-HAN-Interface-Description-v10A-ID-34331.pdf and EXCERPT DLMS UA Blue Book: COSEM interface classes and OBIS identification system, EXCERPT DLMS UA 1000-1 Ed. 12.0

Hardware is an arduino that reads a serial data stream form a Mbus to ttl adapter.
The MBus converter is connected to the HAN port of the power meter. The Adapter is tested with Hafslund Aidon meter, a arduino my sensor node and a Mbus adapter: https://www.ebay.com/itm/TSS721A-Breakout-Module-with-Isolation/113359924361?hash=item1a64c72c89:g:gS0AAOSwF31b5paL:rk:4:pf:0

The arduino MySensor node is connected to a Rasperry Domoticz controler via a 2.4 Mhz mesh network. Ref mySensor.org

Keywords: AMS powermeter, HAN port, OBIS, Mbus, COSEM, Domotizc, mysensors

Notes:

Software serial can be used to test the parser, but on a 3.3V on 8Mhz this might be to slow when parsing the one hour message, use rx tx.

The low power 8mhz Arduino is of this type: https://forum.mysensors.org/topic/2067/my-slim-2aa-battery-node

This Arduno can probably be powered from the Mbus interface. This is not tested. Currently the card is powered with 3.3V via a step-down regulator from 5 v, it consumes 35ma, including loss in the regulator.

The mysensors data is sent in senddata().

This parser is a "top down" recursive parser driven by the grammar of the message, specified in the reference above. The basic grammar is:

Hdlcpackage = startmark, packagelen, frameheader, payload, FCC, endmark
startmark = endmark = “7E”
packagelen = 4 byte ; “A”, 12 bit integer
frameheader = 9 byte ; Not checked, ends with a crc
payload = dataheader, array, register*
dataheader = “0f 40 00 00 00 00” ; might not be fixed
array = «01», dataLen
dataLen = 1 byte; Int
register = structure, structureContent;
structureContent = octetString, OBIScodeandContent ; se code for details

Example:

Header a0 2a 41 08 83 13 04 13 e6 e7 00 : FrameType: 10 FrameLength: 42
DataHeader 0f 40 00 00 00 00
Type & Len 01 01
02 03 : Structur – 3
09 06 : ocet-string len 6
01 00 01 07 00 ff : OBIS kode '1.0.1.7.0.255
06 : double-long-unsigned (32bit)
00 00 06 44 : dec 1604
02 02 : Structur – 2
0f Int8
00 : 0
16 : enum
1b : Watt active power
6f 92 CRC

---

TODO: CRC is not checked,

test power form the Mbus

restructure the parser to a c++ class

There is a isue with parcing the last parts of the "one hour message", but it does not effect the data.

Example on Hour record, partly decoded

7E
A13E410883137F8EE6E700
//length 318 0F4000000000
010E // Array 14

1. 0202 0906 0101000281FF 0A0B 4149444F4E5F5630303031 //OBIS list version
   
2. 0202 0906 0000600100FF 0A10 47333539393335383933933353836300 //måler nr Nr er ofuskert
   
3. 2020 9060 000600107FF 0A04 363531350 // måler type
   
4. 2030 9060 100010700FF 06 0000042E 0202 0F00 161B //activePowerQ1Q4
   
5. 0203 0906 0100020700FF 06 00000000 0202 0F00 161B
   
6. 0203 0906 0100030700FF 06 0000007C 0202 0F00 161D
   
7. 0203 0906 0100040700FF 06 00000000 0202 0F00 161D
   
8. 0203 0906 01001F0700FF 10 002F 0202 0FFF 1621
   
9. 0203 0906 0100200700FF 12 0941 0202 0FFF 1623
   
10. 0202 0906 0000010000FF 090C 07E3021201130000FF000000 //Time and date
    
11. 0203 0906 0100010800FF 06 0020C2BC 0202 0F01 161E
    
12. 0203 0906 0100020800FF 06 00000000 0202 0F01 161E
    
13. 0203 0906 0100030800FF 06 000216B8 0202 0F01 1620
    
14. 0203 0906 0100040800FF 06 0000FB60 0202 0F01 1620
    
15. 166C 7E

data:

MeterID:123456789012
MeterType:6515
OBISVersion:AIDON_V0001
date: 0-0-0-0-0-0-0-0-36-35-31-35-
activePowerQ1Q4: 1872
cumulativActiveIm: 2203350
reactivePowerQ1Q2: 294
currentL1: 8.1000003814
phaseVL1: 237.5000000000

Hardware

Power meter in Domoticz

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