Comments (8)
Will take a look when I get the time 👍
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Thanks for implementing this feature and for the suggestions. We will test it with our datastreams.
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Thank you!
I saw such messages already, but I never found the time to actually look at them in detail. So I am glad that you did. I will take a look at your PR this weekend. 😄
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I took a look at your PR. Overall, I liked your suggested changes. But there are some details, that I would have done differently:
- tests are missing or the existing tests even fail
- you added a
PGHPMessage
class as a mixin to every AIS message - assertions are not a very good practice, because these are removed if optimizations are requested from Python
So, I played a bit around with your code and came up with a slightly different approach. I decided to make the parsing/decoding of NMEA messages a bit more generic. PHGP, AIVDM, and AIVDO messages are all NMEA messages - among many others. All these NMEA messages have in common, that they have a start delimiter, followed by a comma-separated sequence of fields, followed by the character '*', the checksum and an end-of-line marker. Therefore, I added a new class NMEASentence
. This class encapsulates a single NMEA sentence and handles the basic stuff. This allows other classes to build upon this class.
Then there are two new classes:
GatehouseSentence
: encapsulates PGHP messagesAISSentence
: encapsulates AIS messages
I researched GH messages and came to the conclusion that:
GH internal messages type 1 are used for "encapsulating" NMEA messages.
The important part is that GH messages can be used to encapsulate every NMEA message - not just AIS messages. Thus, I decided to add a .meta
attribute to all NMEASentences
. This differs from your approach of adding the .meta
attribute to every AIS message individually.
I am curious about your feedback. Can you live with my suggestions?
@Inrixia: Would you take a look at my changes? Your feedback has proven invaluable in the past. 😁
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Changes in #93 look good.
Might be worth considering a better name than meta and it's associated functions for easier readability.
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Thanks for looking at my changes.
Might be worth considering a better name than meta
Do you have any good suggestion? I thought about this also and did not came up with a nice naming scheme. I ultimately decided to use meta
, because:
- it's kind of meta data about the message
- it's somewhat generic: this allows to store other kinds of "meta data"
from pyais.
I renamed the newly introduced .meta
attribute to wrapper_msg
. I think this makes the intention clear.
@SiggyF I closed your original PR. But I used much of your prior work to implement support for gatehouse wrappers. Thank you!
With Version 2.3.0 gatehouse messages are parsed by every stream class. See examples
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@M0r13n Perfect, that is much more understandable
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Related Issues (20)
- [docs] messages.rst content duplicated. HOT 1
- PiPY out of date? HOT 1
- Stream from serial/COM port HOT 2
- lat lon converters float accuracy HOT 2
- AtoN codes do not match R0126 (A-126) Table 3 or M.1371-5 TABLE 74 HOT 1
- Provide decoding of communication status field in types 1, 2, 3, 4, 9, 11, 18 HOT 5
- pyais fails to decode type 5 messages HOT 6
- Message Type 26 Logic may be incorrect HOT 2
- MessageType24PartA : incorrect length? HOT 6
- EpfdType Enum Missing InternalGNSS = 15 HOT 2
- Navigational statuses 9, 10, 13 and Ship type 29 HOT 3
- NoneFilter broken HOT 1
- Get Country Code HOT 5
- TCPConnection stops receiving messages HOT 4
- Determination of the communication status field HOT 5
- Encoded NRZI data HOT 1
- Proposal for update HOT 5
- TypeError: 'dict' object is not callable HOT 2
- Variable-width text fields processed as constant-width ones HOT 7
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