Norwegian HAN-interface - Kamstrup meter

[oveh]

Basic receive logic:
Receive 1 byte with 1 second timeout

• In case of timeout, check if buffer is not empty and parse it
  
• Otherwise add byte to buffer
  

Can you please provide an example?

The third byte seems to be packet length without first/last 0x7E so you can use that to parse buffer with multiple messages in case they arrive together (10 second and 1 hour data).

Yes, actually it is both 3rd and lower part on 2nd, but the 1 hr and 10 sec message should not come together:

Push interval: Fixed at 3600s, The 10 second timer and the 1 hour timer must not collide since then one of the lists will not be pushed. So the 10 sec timer will be sent at xx:xx:x0 (hh:mms) and the 1 hour timer is offset 5 seconds and sent at xx:00:05 (hh:mms)

Some more sample data. ID-bytes have been replaced with 0x01, and checksum bytes have been updated accordingly

Code:

# 3 examples of 10 sec message. ID changed to 1111... and CRC updated

7EA0E22B2113239AE6E7000F000000000C07E3011501172B0AFF80000002190A0E4B616D73747275705F563030303109060101000005FF0A100101010101010101010101010101010109060101600101FF0A1236383431313231424E32343331303130343009060101010700FF0600000B0809060101020700FF060000000009060101030700FF06000001D109060101040700FF0600000000090601011F0700FF060000044309060101330700FF06000002EE09060101470700FF060000022D09060101200700FF1200DC09060101340700FF1200DD09060101480700FF1200DFA98A7E

7EA0E22B2113239AE6E7000F000000000C07E3011D02010E28FF80000002190A0E4B616D73747275705F563030303109060101000005FF0A100101010101010101010101010101010109060101600101FF0A1236383431313231424E32343331303130343009060101010700FF0600000E5909060101020700FF060000000009060101030700FF060000011509060101040700FF0600000000090601011F0700FF060000058A09060101330700FF060000033D09060101470700FF060000036209060101200700FF1200DA09060101340700FF1200DA09060101480700FF1200DF187E7E

7EA0E22B2113239AE6E7000F000000000C07E3011D0209391EFF80000002190A0E4B616D73747275705F563030303109060101000005FF0A100101010101010101010101010101010109060101600101FF0A1236383431313231424E32343331303130343009060101010700FF060000153009060101020700FF060000000009060101030700FF060000013809060101040700FF0600000000090601011F0700FF06000008AB09060101330700FF06000007B209060101470700FF060000023709060101200700FF1200D609060101340700FF1200DA09060101480700FF1200DDE3777E



# 3 examples of 1 hr message. ID changed to 1111... and CRC updated

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