Parses binary files, which contain the recorded output of a smart meter's optical serial interface, for useful SML telegrams ("smart meter language").
Get a serial optical reader, connect it to your smart meter, run a serial terminal program (9600, 8N1) and look at the output. If there are periodically arriving data blocks starting about like (in hex) ...
1b 1b 1b 1b 01 01 01 01 76 05 03 ...
... then its likely that your meter spits out SML telegrams. Record this output to a binary file. You dont have to align the files begin and end to the datagrams.
Then feed this file to the smlparser.exe (source will compile using gcc in Linux or MinGW under Windows and is also used in my ESP-implementation).
If the output looks similar to the following listing, then you will get the values you are probably most interested in. Typically these might be watt consumption right now (W_now) and total watthours in/out (Wh_tot_in/ Wh_tot_out).
smlparser.exe ..\test\testdata1.bin
smlparser - built Aug 4 2023/14:34:59
sml_decode_binfile: ..\test\testdata1.bin (size: 5544) ...
=== BEGIN TELEGRAM 0 (size=396) ===============
0x1b, 0x1b, 0x1b, 0x1b, 0x01, 0x01, 0x01, 0x01, 0x76, 0x07, 0x00, 0x10, 0x13, 0x1d, 0xc9, 0xfc,
…
0x10, 0x13, 0x1d, 0xca, 0x00, 0x62, 0x00, 0x62, 0x00, 0x72, 0x63, 0x02, 0x01, 0x71, 0x01, 0x63,
0x2d, 0x7c, 0x00, 0x00, 0x1b, 0x1b, 0x1b, 0x1b, 0x1a, 0x01, 0xcc, 0x53,
== BEGIN MSG 0 ==
1. 76
1.1. 07 00 10 13 1d c9 fc # str:'......'
1.2. 62 00 # uint:0 (0x0)
…
1.6. 00
== END MSG 0 ==
== BEGIN MSG 1 ==
1. 76
1.1. 07 00 10 13 1d c9 fd # str:'......'
1.2. 62 00 # uint:0 (0x0)
1.3. 62 00 # uint:0 (0x0)
1.4. 72
1.4.1. 63 07 01 # uint:1793 (0x701)
1.4.2. 77
1.4.2.1. 01 # str:''
1.4.2.2. 0b 09 01 45 4d 48 00 00 4f 07 09 # str:'..EMH..O..'
1.4.2.3. 07 01 00 62 0a ff ff # str:'..b...'
…
1.4.2.5.3.3. 01 # str:''
1.4.2.5.3.4. 62 1e # uint:30 (0x1e)
1.4.2.5.3.5. 52 ff # int:-1 (0xffffffffffffffff) # scaler: -1
1.4.2.5.3.6. 56 00 07 7b ab fd # int:125545469 (0x77babfd) # value: Wh_tot_in=1.25545e+007
1.4.2.5.3.7. 01 # str:''
1.4.2.5.4. 77
1.4.2.5.4.1. 07 01 00 02 08 00 ff # str:'......' # obis: 1.0.2.8.0.255. (Wh_tot_out)
1.4.2.5.4.2. 64 01 01 a2 # uint:65954 (0x101a2)
1.4.2.5.4.3. 01 # str:''
1.4.2.5.4.4. 62 1e # uint:30 (0x1e)
1.4.2.5.4.5. 52 ff # int:-1 (0xffffffffffffffff) # scaler: -1
1.4.2.5.4.6. 56 00 12 3e e2 f6 # int:306111222 (0x123ee2f6) # value: Wh_tot_out=3.06111e+007
1.4.2.5.4.7. 01 # str:''
1.4.2.5.5. 77
…
1.4.2.5.8.4. 62 1e # uint:30 (0x1e)
1.4.2.5.8.5. 52 ff # int:-1 (0xffffffffffffffff) # scaler: -1
1.4.2.5.8.6. 56 00 00 00 00 00 # int:0 (0x0) # value: (null)=0
1.4.2.5.8.7. 01 # str:''
1.4.2.5.9. 77
1.4.2.5.9.1. 07 01 00 10 07 00 ff # str:'......' # obis: 1.0.16.7.0.255. (W_now)
1.4.2.5.9.2. 01 # str:''
1.4.2.5.9.3. 01 # str:''
1.4.2.5.9.4. 62 1b # uint:27 (0x1b)
1.4.2.5.9.5. 52 ff # int:-1 (0xffffffffffffffff) # scaler: -1
1.4.2.5.9.6. 55 ff ff f7 ff # int:-2049 (0xfffffffffffff7ff) # value: W_now=-204.9
1.4.2.5.9.7. 01 # str:''
1.4.2.5.10. 77
This program is only intended to be a a tool for checking what the smart meter spits out. If you want to do something useful with it, then append in your own function for processing the received values here:
_SML_PRINTF(" # value: %s=%g", obis_name, val);
Also note, although this programs expects files, it works internally stream based: This means it can be used for implementations, that read serial ports byte by byte. My ESP-implementation calls
bool sml_decode_stream(char c);
The decode_mem and decode_file functions are just vehicles for test and developement.
Hterm Serial Terminal Programm for Windows (https://www.heise.de/download/product/hterm-53283)
Very good description of the optical hardware and the SML protocol (http://www.stefan-weigert.de/php_loader/sml.php)