Stoen Operator meter Elgama Gama 350 G35 - Poland

[Mhrok]

Hello,
I'm trying to read data from meter installed recently by my utility provider. Elgama Gama 350 is a three phase unit with P1 port with unknown standard.
My request to activate the port was answered with two encryption keys:

Klucz AK: bexxxxxxxxxxxxxxxxxxxxxxxxxxxxda
EK: 98xxxxxxxxxxxxxxxxxxxxxxxxxxxx7f

I have a ready to use cable connected to the generic ESP32-WROOM module with amsreader 2.3.9. ESP is powered from 5 V from meter, RTS is pulled up to VIN, Data is pulled up using 10k and 1k (tested both, not simultaneously).
Settings are 115200 8N1 on GPIO16, but I still only see "HAN: Unknown data received, check meter config" or "HAN: Footer checksum error".

I see no debug in configuration options, I'm using 80 cm cable. What else should I check?

[ArnieO]

This is interesting - as we have tried to find information about which standard is used on the HAN port of smart meters in Poland - but have not managed to find that information yet.

You write "P1 port with unknown standard". Your efforts so far indicate that the port follow the DSMR P1 companion standard, and this link indicates that the payload should follow "IEC 62056-21 and/or DLMS" - which means that this should work.

So it would be very interesting to see debug output from it!
Are you 100% sure you do not have a "Debugging" tile on the bottom of your config-screen?

[ArnieO]

Any chance you can encourage the person who posted it to join this discussion?

I also asked the person, but not sure, that does he speak English.

Google Translate is our best friend in such situations!

[Mhrok]

A logic analyzer would be great.

I do not have any dedicated device that could do that. I'd rather not use some DIY ones to eliminate variables. Luckily, simple ones are dirt cheap and I will hunt one down in case I will fail with todays attempts in communicating with the meter.

[ArnieO]

I have one of these. It is really cheap - and very handy when you need to read and interpret digital signals. It's a clone of a Saleae device, and runs with their software: https://www.saleae.com/pages/downloads

[GSzabados]

@Mhrok, you can get them on Allegro: https://allegro.pl/produkt/balanser-saleae-elek-029-869cc461-5237-47f5-a793-fb821463c629?order=p

[Mhrok]

Looks like I will need it anyway, ordered one. In the meantime, I will gather some data from DIY ones. In thread below I shared some data foun on the wire.

[ArnieO]

Data is pulled up using 10k and 1k

Remember to pull to 3,3V (not to the incoming 5V).
I do not know that meter, but we know for a fact that 10k pullup is too weak for some meters. 3k works well on all meters so far (but 1k should work too).

Also, you'll need to invert the incoming signal - but I believe you can do that in the firmware, using this setting:

[Mhrok]

New firmware indeed has debug menu! It does not give me any valueable output though:

(I) Buffer overflow, resetting
(I) Buffer overflow, resetting
(I) Buffer overflow, resetting
(W) No HAN data received last 30s, single blink

Despite using buffers from 384 to 2048 it still overflows.

Fun fact, when it does not overflow, it gives something - only when I interrupt it somehow - for example with config change.

(V) DSMR frame:
(V) 2F 45 47 4D  35 47 33 35  0D 0A 0D 0A  00 82 02 30
(V) 30 00 00 00  00 30 10 73  D6 59 85 96  B0 2A 8B CC
(V) E7 33 AD 19  A3 A5 4A 4D  0E 3A CF F6  33 DB 57 0A
(V) 45 9A C3 5B  F0 D4 C0 AA  15 B9 93 B0  E8 67 85 EC
(V) 22 CA 40 8C  D7 1A B5 62  AE DF 0F 48  EA D9 E6 56
(V) FB 84 B3 7B  47 C6 29 12  F1 EE BB 22  88 26 75 5C
(V) F8 A2 20 F4  93 F3 64 CA  7C C6 60 32  62 B0 7F F9
(V) 7F 71 0A 9F  DF AB 61 89  6A 9A 10 B1  DF 94 2C 74
(V) 8F 51 B6 09  5C F2 45 6C  38 54 52 FE  B6 CB 1F 42
(V) F2 93 DC 57  BE EE 5A 0D  F8 1F 53 55  0E 21 EF 46
(V) 0A 72 74 CA  AB D8 9C A9  05 9E FD 54  5E CC 7B 71
(V) 40 E1 22 B2  25 5C D5 63  80 BD 97 6E  54 4B 24 A6
(V) 58 1F 79 1F  45 C7 DF C0  83 3B 7F 1E  C7 43 B9 26
(V) F6 EB 6E F2  B1 7C 99 3A  91 EA 39 72  E5 FB 72 B1
(V) E1 24 AF 9D  19 8A 6C 50  69 97 90 D3  3D 68 97 57
(V) C2 EC 49 EF  12 1D 11 44  46 70 46 88  88 98 37 6F
(V) B0 93 FC D2  3F 37 66 1C  C7 F0 93 E3  AF 4D 3C BE
(V) 41 8E B9 48  77 A9 92 5B  42 0A 96 E5  34 4D 30 56
(V) 90 5A 08 03  CC 41 78 58  79 FD 89 82  E0 46 3D 66
(V) AA 42 85 F4  A8 46 2D 4A  E4 81 12 40  68 D6 F5 F9
(V) 11 5A 94 51  21 3C 9F 4F  F7 FE B2 BD  B9 1E D2 12
(V) CF B9 FB 28  D0 B4 82 9E  11 D8 1C FC  E3 36 EC DE
(V) 8A 7C 83 76  F7 EB 3D 2C  4A B7 7F 75  91 F1 F5 18
(V) D4 70 6A C9  3E 3D 3F 9E  0F C6 0F A7  E7 20 11 03
(V) E7 75 4E 40  F1 5E BA 86  30 6D C0 28  C4 14 47 DF
(V) 6A EF CC FE  E4 B6 23 58  2B 9D 4F BF  6A A8 93 84
(V) F4 CD 4D FF  47 B5 C4 81  D2 DA D3 6B  C3 F4 1D C4
(V) 6E E1 9B 24  30 91 7B 33  57 67 B6 E4  93 FE 8B 5B
(V) AE 8A 0D 81  DE A5 C3 3F  82 9A CE E2  BA 6D 50 39
(V) FC 99 E6 7A  7B B4 E9 A9  84 78 AF 2D  4C D2 15 53
(V) 6B 98 2B 1F  C8 3D 57 9E  49 68 40 0C  D3 4A 9E D6
(V) 4F 1F 12 50  84 32 AD 62  C6 D3 42 34  46 66 65 56
(V) 49 81 F4 BC  8E C6 75 77  11 1F 29 BB  80 20 23 0A
(V) 80 D5 31 50  16 89 6F 07  4A 25 BE F0  4B 60 36 87
(V) AE A6 2A 53  79 22 15 A5  2A C7 1D 15  7B 87 DD B5
(V) 07 3D 1C 28  6A 8F 8C 95  E2 5C 60 AB  F8 73 D4 2C
(V) 21 45 37 41  35 0D 0A 2F  45 47 4D 35  47 33 35 0D
(V) 0A 0D 0A 00  82 02 30 30  00 00 00 00  30 10 73 D6
(V) 59 85 96 B0  2A 8B CC E7  33 AD 19 A3  A5 4A 4D 0E
(V) 3A CE F6 33  DB 57 0A 45  9A C3 5B F0  D4 C0 AA 15
(V) B9 93 B0 E8  67 85 EC 22  CA 40 8C D7  1A B5 62 AE
(V) DF 0F 48 EA  D9 E6 56 FB  84 B3 7B 47  C6 29 12 F1
(V) EE BB 22 88  26 75 5C F8  A2 20 F4 93  F3 64 CA 7C
(V) C6 60 32 62  B0 7F F9 7F  71 0A 9F DF  AB 61 89 6A
(V) 9A 10 B1 DF  94 2C 74 8F  51 B6 09 5C  F2 45 6C 38
(V) 54 52 FE B6  CB 1F 42 F2  93 DC 57 BE  EE 5A 0D F8
(V) 1F 53 55 0E  21 EF 46 0A  72 74 CA AB  D8 9C A9 05
(V) 9E FD 54 5E  CC 7B 71 40  E1 22 B2 25  5C D5 63 80
(V) BD 97 6E 54  4B 24 A6 58  1F 79 1F 45  C7 DF C0 83
(V) 3B 7F 1E C7  43 B9 26 F6  EB 6E F2 B1  7C 99 3A 91
(V) EA 39 72 E5  FB 72 B1 E1  24 AF 9D 19  8A 6C 50 69
(V) 97 90 D3 3D  68 97 57 C2  EC 49 EF 12  1D 11 44 46
(V) 70 46 88 88  98 37 6F B0  93 FC D2 3F  37 66 1C C7
(V) F0 93 E3 AF  4D 3C BE 41  8E B9 48 77  A9 92 5B 42
(V) 0A 96 E5 34  4D 30 56 90  5A 08 03 CC  41 78 58 79
(V) FD 89 82 E0  46 3D 66 AA  42 85 F4 A8  46 2D 4A E4
(V) 81 12 40 68  D6 F5 F9 11  5A 94 51 21  3C 9F 4F F7
(V) FE B3 B5 BF  1E D2 12 CF  B9 FB 28 D0  B4 82 9E 11
(V) D8 1C FC E3  36 EC DE 8A  7C 83 76 F7  EB 3D 2C 4A
(V) B7 7F 75 91  F1 F5 18 D4  70 6A C9 3E  3D 3F 9E 0F
(V) C6 0F A7 E7  20 11 03 E7  75 4E 40 F1  5E BA 86 30
(V) 6D C0 28 C4  14 47 DF 6A  EF CC FE E4  B6 23 58 2B
(V) 9D 4F BF 6A  A8 93 84 F4  CD 4D FF 47  B5 C4 81 D2
(V) DA D3 6B C3  F4 1D C4 6E  E1 9B 24 30  91 7B 33 57
(V) 67 B6 E4 93  FE 8B 5B AE  8A 0D 81 DE  A5 C3 3F 82
(V) 9A CE E2 BA  6D 50 39 FC  99 E6 7A 7B  B4 E9 A9 84
(V) 78 AF 2D 4C  D2 15 53 6B  98 2B 1F C8  3D 57 9E 49
(V) 68 40 0C D3  4A 9E D6 4F  1F 12 50 84  32 AD 62 C6
(V) D3 42 34 46  66 65 56 49  81 F4 BC 8E  C6 75 77 11
(V) 1F 29 BB 80  20 23 0A 80  D5 31 50 16  89 6F 07 4A
(V) 25 BE F0 4B  60 36 87 AE  A6 2A 53 79  22 15 A5 2A
(V) C7 1D 15 7B  87 DD B5 07  3D 1C 28 C1  B6 51 47 2F
(V) 39 DE D9 B9  29 B6 78 21  46 45 30 43  0D 0A 2F 45
(V) 47 4D 35 47  33 35 0D 0A  0D 0A 00 82  02 30 30 00
(V) 00 00 00 30  10 73 D6 59  85 96 B0 2A  8B CC E7 33
(V) AD 19 A3 A5  4A 4D 0E 3A  C9 F6 33 DB  57 0A 45 9A
(V) C3 5B F0 D4  C0 AA 15 B9  93 B0 E8 67  85 EC 22 CA
(V) 40 8C D7 1A  B5 62 AE DF  0F 48 EA D9  E6 56 FB 84
(V) B3 7B 47 C6  29 12 F1 EE  BB 22 88 26  75 5C F8 A2
(V) 20 F4 93 F3  64 CA 7C C6  60 32 62 B0  7F F9 7F 71
(V) 0A 9F DF AB  61 89 6A 9A  10 B1 DF 94  2C 74 8F 51
(V) B6 09 5C F2  45 6C 38 54  52 FE B6 CB  1F 42 F2 93
(V) DC 57 BE EE  5A 0D F8 1F  53 55 0E 21  EF 46 0A 72
(V) 74 CA AB D8  9C A9 05 9E  FD 54 5E CC  7B 71 40 E1
(V) 22 B2 25 5C  D5 63 80 BD  97 6E 54 4B  24 A6 58 1F
(V) 79 1F 45 C7  DF C0 83 3B  7F 1E C7 43  B9 26 F6 EB
(V) 6E F2 B1 7C  99 3A 91 EA  39 72 E5 FB  72 B1 E1 24
(V) AF 9D 19 8A  6C 50 69 97  90 D3 3D 68  97 57 C2 EC
(V) 49 EF 12 1D  11 44 46 70  46 88 88 98  37 6F B0 93
(V) FC D2 3F 37  66 1C C7 F0  93 E3 AF 4D  3C BE 41 8E
(V) B9 48 77 A9  92 5B 42 0A  96 E5 34 4D  30 56 90 5A
(V) 08 03 CC 41  78 58 79 FD  89 82 E0 46  3D 66 AA 42
(V) 85 F4 A8 46  2D 4A E4 81  12 40 68 D6  F5 F9 11 5A
(V) 94 51 21 3C  9F 4F F7 FE  B3 B5 BA 1E  D2 12 CF B9
(V) FB 28 D0 B4  82 9E 11 D8  1C FC E3 36  EC DE 8A 7C
(V) 83 76 F7 EB  3D 2C 4A B7  7F 75 91 F1  F5 18 D4 70
(V) 6A C9 3E 3D  3F 9E 0F C6  0F A7 E7 20  11 03 E7 75
(V) 4E 40 F1 5E  BA 86 30 6D  C0 28 C4 14  47 DF 6A EF
(V) CC FE E4 B6  23 58 2B 9D  4F BF 6A A8  93 84 F4 CD
(V) 4D FF 47 B5  C4 81 D2 DA  D3 6B C3 F4  1D C4 6E E1
(V) 9B 24 30 91  7B 33 57 67  B6 E4 93 FE  8B 5B AE 8A
(V) 0D 81 DE A5  C3 3F 82 9A  CE E2 BA 6D  50 39 FC 99
(V) E6 7A 7B B4  E9 A9 84 78  AF 2D 4C D2  15 53 6B 98
(V) 2B 1F C8 3D  57 9E 49 68  40 0C D3 4A  9E D6 4F 1F
(V) 12 50 84 32  AD 62 C6 D3  42 34 46 66  65 56 49 81
(V) F4 BC 8E C6  75 77 11 1F  29 BB 80 20  23 0A 80 D5
(V) 31 50 16 89  6F 07 4A 25  BE F0 4B 60  36 87 AE A6
(V) 2A 53 79 22  15 A5 2A C7  1D 15 7B 87  DD B5 07 3D
(V) 1C 28 6A 0E  B9 39 EC CC  3A C3 46 28  37 0A 21 38
(V) 33 35 43 0D  0A
(W) Frame checksum error
(V)   payload:
(V) 2F 45 47 4D  35 47 33 35  0D 0A 0D 0A  00 82 02 30
(V) 30 00 00 00  00 30 10 73  D6 59 85 96  B0 2A 8B CC
(V) E7 33 AD 19  A3 A5 4A 4D  0E 3A CF F6  33 DB 57 0A
(V) 45 9A C3 5B  F0 D4 C0 AA  15 B9 93 B0  E8 67 85 EC
(V) 22 CA 40 8C  D7 1A B5 62  AE DF 0F 48  EA D9 E6 56
(V) FB 84 B3 7B  47 C6 29 12  F1 EE BB 22  88 26 75 5C
(V) F8 A2 20 F4  93 F3 64 CA  7C C6 60 32  62 B0 7F F9
(V) 7F 71 0A 9F  DF AB 61 89  6A 9A 10 B1  DF 94 2C 74
(V) 8F 51 B6 09  5C F2 45 6C  38 54 52 FE  B6 CB 1F 42
(V) F2 93 DC 57  BE EE 5A 0D  F8 1F 53 55  0E 21 EF 46
(E) Serial buffer overflow
(E) 0A 72 74 CA  AB D8 9C A9  05 9E FD 54  5E CC 7B 71
(E) 40 E1 22 B2  25 5C D5 63  80 BD 97 6E  54 4B 24 A6
(E) 58 1F 79 1F  45 C7 DF C0  83 3B 7F 1E  C7 43 B9 26
(E) F6 EB 6E F2  B1 7C 99 3A  91 EA 39 72  E5 FB 72 B1
(E) E1 24 AF 9D  19 8A 6C 50  69 97 90 D3  3D 68 97 57
(E) C2 EC 49 EF  12 1D 11 44  46 70 46 88  88 98 37 6F
(E) B0 93 FC D2  3F 37 66 1C  C7 F0 93 E3  AF 4D 3C BE
(E) 41 8E B9 48  77 A9 92 5B  42 0A 96 E5  34 4D 30 56
(E) 90 5A 08 03  CC 41 78 58  79 FD 89 82  E0 46 3D 66
(E) AA 42 85 F4  A8 46 2D 4A  E4 81 12 40  68 D6 F5 F9
(E) 11 5A 94 51  21 3C 9F 4F  F7 FE B2 BD  B9 1E D2 12
(E) CF B9 FB 28  D0 B4 82 9E  11 D8 1C FC  E3 36 EC DE
(E) 8A 7C 83 76  F7 EB 3D 2C  4A B7 7F 75  91 F1 F5 18
(E) D4 70 6A C9  3E 3D 3F 9E  0F C6 0F A7  E7 20 11 03
(E) E7 75 4E 40  F1 5E BA 86  30 6D C0 28  C4 14 47 DF
(E) 6A EF CC FE  E4 B6 23 58  2B 9D 4F BF  6A A8 93 84
(E) F4 CD 4D FF  47 B5 C4 81  D2 DA D3 6B  C3 F4 1D C4
(E) 6E E1 9B 24  30 91 7B 33  57 67 B6 E4  93 FE 8B 5B
(E) AE 8A 0D 81  DE A5 C3 3F  82 9A CE E2  BA 6D 50 39
(E) FC 99 E6 7A  7B B4 E9 A9  84 78 AF 2D  4C D2 15 53
(E) 6B 98 2B 1F  C8 3D 57 9E  49 68 40 0C  D3 4A 9E D6
(E) 4F 1F 12 50  84 32 AD 62  C6 D3 42 34  46 66 65 56
(E) 49 81 F4 BC  8E C6 75 77  11 1F 29 BB  80 20 23 0A
(E) 80 D5 31 50  16 89 6F 07  4A 25 BE F0  4B 60 36 87
(E) AE A6 2A 53  79 22 15 A5  2A C7 1D 15  7B 87 DD B5
(E) 07 3D 1C 28  6A 8F 8C 95  E2 5C 60 AB  F8 73 D4 2C
(E) 21 45 37 41  35 0D 0A 2F  45 47 4D 35  47 33 35 0D
(E) 0A 0D 0A 00  82 02 30 30  00 00 00 00  30 10 73 D6
(E) 59 85 96 B0  2A 8B CC E7  33 AD 19 A3  A5 4A 4D 0E
(E) 3A CE F6 33  DB 57 0A 45  9A C3 5B F0  D4 C0 AA 15
(E) B9 93 B0 E8  67 85 EC 22  CA 40 8C D7  1A B5 62 AE
(E) DF 0F 48 EA  D9 E6 56 FB  84 B3 7B 47  C6 29 12 F1
(E) EE BB 22 88  26 75 5C F8  A2 20 F4 93  F3 64 CA 7C
(E) C6 60 32 62  B0 7F F9 7F  71 0A 9F DF  AB 61 89 6A
(E) 9A 10 B1 DF  94 2C 74 8F  51 B6 09 5C  F2 45 6C 38
(E) 54 52 FE B6  CB 1F 42 F2  93 DC 57 BE  EE 5A 0D F8
(E) 1F 53 55 0E  21 EF 46 0A  72 74 CA AB  D8 9C A9 05
(E) 9E FD 54 5E  CC 7B 71 40  E1 22 B2 25  5C D5 63 80
(E) BD 97 6E 54  4B 24 A6 58  1F 79 1F 45  C7 DF C0 83
(E) 3B 7F 1E C7  43 B9 26 F6  EB 6E F2 B1  7C 99 3A 91
(E) EA 39 72 E5  FB 72 B1 E1  24 AF 9D 19  8A 6C 50 69
(E) 97 90 D3 3D  68 97 57 C2  EC 49 EF 12  1D 11 44 46
(E) 70 46 88 88  98 37 6F B0  93 FC D2 3F  37 66 1C C7
(E) F0 93 E3 AF  4D 3C BE 41  8E B9 48 77  A9 92 5B 42
(E) 0A 96 E5 34  4D 30 56 90  5A 08 03 CC  41 78 58 79
(E) FD 89 82 E0  46 3D 66 AA  42 85 F4 A8  46 2D 4A E4
(E) 81 12 40 68  D6 F5 F9 11  5A 94 51 21  3C 9F 4F F7
(E) FE B3 B5 BF  1E D2 12 CF  B9 FB 28 D0  B4 82 9E 11
(E) D8 1C FC E3  36 EC DE 8A  7C 83 76 F7  EB 3D 2C 4A
(E) B7 7F 75 91  F1 F5 18 D4  70 6A C9 3E  3D 3F 9E 0F
(E) C6 0F A7 E7  20 11 03 E7  75 4E 40 F1  5E BA 86 30
(E) 6D C0 28 C4  14 47 DF 6A  EF CC FE E4  B6 23 58 2B
(E) 9D 4F BF 6A  A8 93 84 F4  CD 4D FF 47  B5 C4 81 D2
(E) DA D3 6B C3  F4 1D C4 6E  E1 9B 24 30  91 7B 33 57
(E) 67 B6 E4 93  FE 8B 5B AE  8A 0D 81 DE  A5 C3 3F 82
(E) 9A CE E2 BA  6D 50 39 FC  99 E6 7A 7B  B4 E9 A9 84
(E) 78 AF 2D 4C  D2 15 53 6B  98 2B 1F C8  3D 57 9E 49
(E) 68 40 0C D3  4A 9E D6 4F  1F 12 50 84  32 AD 62 C6
(E) D3 42 34 46  66 65 56 49  81 F4 BC 8E  C6 75 77 11
(E) 1F 29 BB 80  20 23 0A 80  D5 31 50 16  89 6F 07 4A
(E) 25 BE F0 4B  60 36 87 AE  A6 2A 53 79  22 15 A5 2A
(E) C7 1D 15 7B  87 DD B5 07  3D 1C 28 C1  B6 51 47 2F
(E) 39 DE D9 B9  29 B6 78 21  46 45 30 43  0D 0A 2F 45
(E) 47 4D 35 47  33 35 0D 0A  0D 0A 00 82  02 30 30 00
(E) 00 00 00 30  10 73 D6 59  85 96 B0 2A  8B CC E7 33
(E) AD 19 A3 A5  4A 4D 0E 3A  C9 F6 33 DB  57 0A 45 9A
(E) C3 5B F0 D4  C0 AA 15 B9  93 B0 E8 67  85 EC 22 CA
(E) 40 8C D7 1A  B5 62 AE DF  0F 48 EA D9  E6 56 FB 84
(E) B3 7B 47 C6  29 12 F1 EE  BB 22 88 26  75 5C F8 A2
(E) 20 F4 93 F3  64 CA 7C C6  60 32 62 B0  7F F9 7F 71
(E) 0A 9F DF AB  61 89 6A 9A  10 B1 DF 94  2C 74 8F 51
(E) B6 09 5C F2  45 6C 38 54  52 FE B6 CB  1F 42 F2 93
(E) DC 57 BE EE  5A 0D F8 1F  53 55 0E 21  EF 46 0A 72
(E) 74 CA AB D8  9C A9 05 9E  FD 54 5E CC  7B 71 40 E1
(E) 22 B2 25 5C  D5 63 80 BD  97 6E 54 4B  24 A6 58 1F
(E) 79 1F 45 C7  DF C0 83 3B  7F 1E C7 43  B9 26 F6 EB
(E) 6E F2 B1 7C  99 3A 91 EA  39 72 E5 FB  72 B1 E1 24
(E) AF 9D 19 8A  6C 50 69 97  90 D3 3D 68  97 57 C2 EC
(E) 49 EF 12 1D  11 44 46 70  46 88 88 98  37 6F B0 93
(E) FC D2 3F 37  66 1C C7 F0  93 E3 AF 4D  3C BE 41 8E
(E) B9 48 77 A9  92 5B 42 0A  96 E5 34 4D  30 56 90 5A
(E) 08 03 CC 41  78 58 79 FD  89 82 E0 46  3D 66 AA 42
(E) 85 F4 A8 46  2D 4A E4 81  12 40 68 D6  F5 F9 11 5A
(E) 94 51 21 3C  9F 4F F7 FE  B3 B5 BA 1E  D2 12 CF B9
(E) FB 28 D0 B4  82 9E 11 D8  1C FC E3 36  EC DE 8A 7C
(E) 83 76 F7 EB  3D 2C 4A B7  7F 75 91 F1  F5 18 D4 70
(E) 6A C9 3E 3D  3F 9E 0F C6  0F A7 E7 20  11 03 E7 75
(E) 4E 40 F1 5E  BA 86 30 6D  C0 28 C4 14  47 DF 6A EF
(E) CC FE E4 B6  23 58 2B 9D  4F BF 6A A8  93 84 F4 CD
(E) 4D FF 47 B5  C4 81 D2 DA  D3 6B C3 F4  1D C4 6E E1
(E) 9B 24 30 91  7B 33 57 67  B6 E4 93 FE  8B 5B AE 8A
(E) 0D 81 DE A5  C3 3F 82 9A  CE E2 BA 6D  50 39 FC 99
(E) E6 7A 7B B4  E9 A9 84 78  AF 2D 4C D2  15 53 6B 98
(E) 2B 1F C8 3D  57 9E 49 68  40 0C D3 4A  9E D6 4F 1F
(E) 12 50 84 32  AD 62 C6 D3  42 34 46 66  65 56 49 81
(E) F4 BC 8E C6  75 77 11 1F  29 BB 80 20  23 0A 80 D5
(E) 31 50 16 89  6F 07 4A 25  BE F0 4B 60  36 87 AE A6
(E) 2A 53 79 22  15 A5 2A C7  1D 15 7B 87  DD B5 07 3D
(E) 1C 28 6A 0E  B9 39 EC CC  3A C3 46 28  37 0A 21 38
(E) 33 35 43 0D  0A
(W) Used 1600ms to

[gskjold]

Are we sure we are on the correct baud rate and parity? I can't see any useful data in here that makes sense..

The only thing is a short string "EGM5G35" in here, but I cannot find anything familiar in the rest of the data

[Mhrok]

Are we sure we are on the correct baud rate and parity?

Other data dump mentioned in this thread is my guidance. Yet, I'm no trusting that easily and there are two possible causes:

1. It is encrypted in some weird way
2. Baud is different, which I am currently investigating with Arduino UNO as a logic analyzer, while proper logic analyzer is ordered and will be delivered... soon :)

EGM5G35 probably means ElGaMa G35, that may be a clue baud i in the ballpark.

[GSzabados]

2. Baud is different, which I am currently investigating with Arduino UNO as a logic analyzer, while proper logic analyzer is ordered and will be delivered... soon :)

I don't know what is your sampling rate on that image, but that rather look like 19200.

But to sample correctly the 115200, you need at least 250kHz sampling rate, if I am not mistaken.

[ArnieO]

All P1 meters we have seen are 115 200 baud / 8N1, you can assume that is the correct setting.

[gskjold]

My request to activate the port was answered with two encryption keys:

Klucz AK: bexxxxxxxxxxxxxxxxxxxxxxxxxxxxda
EK: 98xxxxxxxxxxxxxxxxxxxxxxxxxxxx7f

In meter config, tick "Meter is encrypted" and paste the EK key in the first field and AK key in the second.

[ArnieO]

Is it this one?

I believe we have already implemented that one.

[gskjold]

I already understand the type of encryption used, it is just the encapsulation method that I have not seen before. It is a simple matter to make the code recognize this encapsulation and it will decrypt the data. I will implement and run some tests in the near future.

[Mhrok]

I will implement and run some tests in the near future.

Lovely, can't wait!

[mich909]

If needed I could send more RAW frames for tests purpose.
Thank you for tagging me, I lost hope that I could ever read the data from my meter :D

[ArnieO]

@mich909 That could potentially be helpful!

[gskjold]

Alright, got the first test firmware ready, give it a go and see if it works out for you:
esp32s3.zip
esp32solo.zip
esp32.zip
esp8266.zip
esp32c3.zip
esp32s2.zip

[GSzabados]

data required by law

This is the regulation on smart metering:

https://sip.lex.pl/akty-prawne/dzu-dziennik-ustaw/system-pomiarowy-19228182

The requirements are outlined in one of the annexes, I believe in Annex 1:

https://sipdata.lex.pl/dane/dzienniki/2022/2604090/1.pdf

But be aware of this section as well:

Rozdział 13
Przepisy przejściowe i przepis końcowy
§ 21.
2. Układy pomiarowo-rozliczeniowe:

1. zainstalowane lub zmodernizowane w okresie od dnia 4 lipca 2019 r. do dnia wejścia w życie rozporządzenia oraz
2. instalowane po dniu wejścia w życie rozporządzenia, które zostały zakupione lub były objęte postępowaniem przetargowym wszczętym przed tym dniem - dostosowuje się do wymagań określonych w rozporządzeniu w terminie do dnia 4 lipca 2031 r.

Most of the meters on the Polish market are still tendered or purchased before the date of coming into force, from March 22, 2022.

[Mhrok]

I read the law again, and they are indeed doing bare minimum:

Licznik zdalnego odczytu udostępnia w czasie zbliżonym do rzeczywistego, na interfejsie komunikacyjnym, o którym mowa w pkt. 7.3.2, informacje w szczególności zawierające:

• wartości energii czynnej pobranej
• wartości energii czynnej oddanej
• wartość chwilową mocy czynnej sumarycznej dla kierunku pobór i oddanie
• parametry ograniczenia mocy czynnej w trybie normalnym
• parametry ograniczenia mocy czynnej (tryb zarządzania stroną popytową) w ustalonym formacie
• parametry ograniczenia mocy czynnej (tryb awaryjny) w ustalonym formacie
• nr seryjny licznika zdalnego odczytu
• znacznik czasu danych pomiarowych

Which in common language is:

The remote reading meter shall make available, in near real time, on the communication interface referred to in Section. 7.3.2, information including in particular:

• values of active energy consumed
• values of active energy given up
• the instantaneous value of the total active power for the direction of intake and output
• parameters of active power limitation in normal mode
• parameters of active power limitation (demand side management mode) in the established format
• parameters of active power limitation (emergency mode) in the established format
• serial number of the remote reading meter
• timestamp of measurement data

Translated with DeepL.com (free version)

And I bet, the parameters unknown to @gskjold are related to power limiting :)

[GSzabados]

And I would assume that the meter is sending multiple kind of telegrams with different periodicity. Some containing the information what @gskjold showed, and others with 1 to 15 minutes periodicity some other information, like average load, and line voltage.

But this is just a guess, you should log the telegrams for at least 2 hours to see what other messages are sent with different periodicity.

[Mhrok]

And I would assume that the meter is sending multiple kind of telegrams with different periodicity

I have monitoring working for 17 hours, I enabled MQTT to Home Assistant couple hours ago and I see no voltages.
I think they are doing bare minimum and nothing more.

[ArnieO]

They have really made an effort to complicate things... 😅

[mstuczko]

If anyone interested, I kindly asked the vedor - Elgama - and they replied to my query on P1 port standards/etc, and wrote that it is compliant with DSMR 5.0.2 P1.
So if you see that only a field or two is received in datagrams - I suggest to contact the vendor. 😄
I can be the mediator, if you like, so we don't spam them.

Port P1 w naszych licznikach jest zgodny z DSMR 5.0.2 P1 Companion Standard.

[DSMR 5.0.2 P1 Companion Standard | Netbeheer Nederland]
(https://www.netbeheernederland.nl/publicatie/dsmr-502-p1-companion-standard)

Soon I should be able to test things on my meter. I am waiting for PCB plus for sockets. Once I collect all I will ask STOEN to give me physical access to the P1 port.

[ArnieO]

That is the information we hoped to see - that Polish P1 meters are compliant with the Dutch "P1 Companion" standard. This means that our Pow-P1 reader can be used on such meters also in Poland.

Thank you for sharing this information!

[GSzabados]

that Polish P1 meters

I would say, STOEN's P1 meters from Elgama. This is the first meter and operator which utilises the P1 port in Poland. Likely more to come, but who knows when and by which operator and manufacturer.

[ArnieO]

OK, I understand the situation is complex / not standardized.