06.03.2024

– reduced memory footprint for N2kMsg::AddAISStr – bumped library version – Ensure that strings added by N2kMsg::AddAISStr are 6 bit ASCII ITU-R M.1371-1 table 14 compliant

26.02.2024

changed (char *) arguments to (const char *) in Set functions for PGN 129809, 129810, 129794
Added AddAISStr() method to N2kMsg class which filters AIS strings to make complient with ITU-R M.1371-1
modified Set functions for PGN 129809, 129810, 129794 to use AddAISStr()

23.02.2024

Compatibility change: Parsers ParseN2kPGN129809, ParseN2kPGN129810 and ParseN2kPGN129794 parameter list Added buffer length fields for Name, Callsign, and Destination
Fixed PGN 129809, 129810, 129794 string handling. AIS strings uses @ for padding.

09.02.2024

Fix multiple spelling errors in comments. Thanks to garaminowicz.

06.02.2024

Fix tPriorityRingBuffer. It did not freed values properly. tPriorityRingBuffer is used on tNMEA2000_Teensyx driver.
Ring buffer documentation update.
Fixed SetN2kPGN129284 and ParseN2kPGN129284. Changed OriginWaypointNumber and DestinationWaypointNumber parameter to uint32_t. This causes compatibility issue for users used ParseN2kPGN129284 and they have to update reference parameter type. Also if SetN2kPGN129284 was used with related parameters value N2kUint8NA, they must be updated to use N2kUint32NA
Moved OnOpen call on Open after setting Heartbeat interval and offset. If Heartbeat settings were set on OnOpen, settings were reset.
Added note to documentation for OnOpen about coming change.
Added lightning PGNs to fastpacket list.

02.02.2024

Document update. Updates on document sources and code sources.

22.01.2024

Fixed compiler error in case #define N2K_NO_HEARTBEAT_SUPPORT 1 has been used.
Fixed priority setting test on tN2kGroupFunctionHandler::HandleCommand and tN2kGroupFunctionHandlerForPGN126998::HandleCommand
Fixed Mode setting on SetN2kPGN129540

21.01.2024

Document update. Updates on document sources and code sources.

13.01.2024

Fixed PGN129539 reader and parser.
Added #include "N2kTypes.h" to N2kMaretron.h
Fixed PGN130316 default period information
Added missing methods to tRingBuffer template
Updated copyright

08.12.2023

Added entertainment fastpacket PGNs to fastpacket list.
Added electric fastpcket PGNs 127490, 127491, 127494, 127495 to fastpacket list.
Added elevator fastpacket PGN 128538 to fastpacket list.
Moved FindSourceDeviceIndex to public
Added IsOpen
Added GetForwardStream
Document update by trixpan
Added fluid type enum to N2kMessagesEnumToStr.h
Added support for NMEA2000_ArduinoCAN to NMEA2000_CAN.h by jboynes

04.10.2023

Fix use N2kMillis instead of millis on N2kDeviceList by nicklasb.

12.09.2023

Fixed priority setting on N2kGroupFunction tN2kGroupFunctionHandler::ParseCommandParams
Fixed inline void SetN2kPGN129285 on N2kMessages.h to avoid conflict
Fixed readNHexByte on SeaSmart.cpp to avoid warning.
Restored dropped GetManufacturerInformation() definition to tNMEA2000::tDevice
Fix comment for 127233L on NMEA2000.cpp

25.07.2023

Changed INT32_MAX instead of LONG_MAX on N2kTimer.h by Sam Meredith
CMakeLists update by phatpaul
Cleaner CMakeLists.txt by Paul Abbott
Example ActisenseListener update

20.05.2023

Example N2kDataToNMEA0183 update by Andrei Errapart

19.05.2023

Catch update to version 2.13.10 by Andrei Errapart
Fix N2kMessages/ ParsePGN129029 initialize reference station variables t NA, if no reference station by Andrei Errapart
CMakeLists compatible as ESP-IDF by Paul Abbott
N2kCANMsg.h: Changed #include <N2kMSG.h> to use quotes.

08.02.2023

Fixed priority setting on SetN2kPGN130577.
Fixed "set temperature" field to unsigned on ParseN2kPGN130316 and SetN2kPGN130316.

01.02.2023

Copyright update.
Document update. Still some lost NMEA document.

21.12.2022

Creating Doxygen based documentation for the library. There will be more documentation updating in future, when I have time to read it through. I also encourage users to read documentation and fix errors, spelling, grammar. I prefer to make pure documentation update PRs to keep them separate from new features. + Great thanks for matthias-mv for excellent and big job!

27.11.2022

Updated test and added missing source file, thanks to PeterFromSweden.
Fixed tN2kBatChem - Added ZnO, noted by matthias-mw
Added optional SID to SetN2kPGN129039, noted by matthias-mw
Added N2kts_ShaftSealTemperature, noted by gorlanovmax

27.10.2022

Compatibility change for PGN 129794 setter function: Replaced tN2kAISTranceiverInfo with tN2kAISTransceiverInformation. tN2kAISTranceiverInfo was duplicate for tN2kAISTransceiverInformation. It has been also removed from N2kTypes.h.
Compatibility change for PGN 129038 setter function: Added tN2kAISTransceiverInformation as parameter. I pop up that at least some MFD:s does not show class A AIS objects, if transceiver information has not been properly set. + Thanks to usauerbrey.

26.10.2022

Version confirmed to pass NMEA2000 certification tests.
Empty incoming frames before starting address claiming on Open.
Fix: Open returned always false.
Fix: Group function request turn off transmission for heartbeat (PGN 126993) did no nack.
Added possibility to select CAN alternative pins for Teensyx.

03.10.2022

Possible compatibility change: tN2kGroupFunctionHandler::GetRequestGroupFunctionTransmissionOrPriorityErrorCode interface has changed. If you have used that, please update interface.
Possible compatibility change: Removed need of delay function on tNMEA2000::Open(). Now it opens CAN commununication and returns true, if that and other configuration succeeds. Final open, when address claiming starts, will be delayed and done by ParseMessages. There is new callback OnOpen, which will be called on initial address claiming started. See <<SetOnOpen,below>>
Possible compatibility change: For linux users removed default dummy tSocketStream serStream; from NMEA2000_CAN.h
Compatibility change: PGN129285 parameter list SetN2kPGN129285 and SetN2kRouteWPInfo has been changed. Compiler could not solve ambiguous problem between compatibility inlines, so users are forced to change to new interface.
Added [[SetOnOpen]]tNMEA2000::SetOnOpen to set callback for communication open. You need this e.g., if you want to synchronize your messages with offsets. See how it has been used e.g., on exmample TemperatureMonitor.
New module N2kTimer to hide platform dependent millis(). Module declares scheduler classes to fix problems on simple millis() testing in case of roll over. Class tN2kSyncScheduler is for synchronizing message sending. See how it has been used e.g., on example TemperatureMonitor
Improved: Single test for pending information (tInternalDevice::HasPendingInformation) to avoid multiple tests in every loop.
Fix: Heartbeat problem caused by millis() roll over after 49 days.
Fix: Added missing const modifiers. Thanks alexg-k.
Fix: Limit SendRxPGNList/SendTxPGNList to avoid crash in case of error.
Fix: PGN 129285 Waypoint list. Thanks aydosj.
Added: PGN 127252 Heave. Thanks aydosj.
Changed some parameter order in classes to save small amount of memory.
Updated examples TemperatureMonitor, WindMonitor, BatteryMonitor and MessageSender to use tN2kSyncScheduler and tNMEA2000::SetOnOpen for synchronizating messages.

11.08.2022

Fix: On N2kGroupFunctionDefaultHandlers.cpp tN2kGroupFunctionHandlerForPGN60928 unique number length is 3 bytes.
Fix: On N2kMsg.cpp changed round(v/precision) to round((v/precision)), since some system round macro behaved unexpectedly. Thaks to ieb.

06.07.2022

Fix: use proper array delete operator in RingBuffer, thanks garaminowicz
Fix: PGN 127251 rate of turn type, thanks BerndCirotzki and for remind speters.
Fix: PGN 129794 setter.

07.04.2022

Changed "#include cstring" to "#include string.h" cstring is not available on all environments.
Fixed proprietary PGN handling on N2kGroupFunction.cpp.
Fixed N2kMsg.cpp:SetBuf3ByteDouble(). Thanks to mairas.
Add support for PGN 129041, 130323. Thanks to MattCairns.
Added support for PGN127237, 127233, 130577 and more detail for 129039. Thanks to aydosj.
Copyright update.

05.09.2021

Documentation update.

23.08.2021

Added manufacturer bits to engine discrete status ( PGN 127489 )
Added data limitation handling to tN2kMsg. Now overflow values will be sent as overflow. E.g. SetN2kTemperature(N2kMsg,0xff,0,N2kts_MainCabinTemperature,CToKelvin(800)); + will send temperature as 0xfffe, which is NMEA2000 standard way to inform that value is out of range. Library does not yet handle overflow on reading, but it is under construction.
Fixed PGNs 126992, 128275, 129029 time reading to UDouble
Added function tNMEA2000::Restart(). This is preliminary and may change. Read more info on NMEA2000.h.
Modified tNMEA2000::RespondGroupFunction to allow user add own common group function handler with PGN=0.
Fixed tNMEA2000::HandleCommandedAddress which should be accepted only by BAM TP.
Added tN2kGroupFunctionHandler::ChangeTransmissionOrPriorityErrorCode
Fixed tN2kGroupFunctionHandlerForPGN126993::HandleRequest. System must not respond to pure 126208 request for 126993. Also TransmissionInterval setting is limited to 1000 - 60000 ms.
Modified debug messages.

04.03.2021

Fix for engine discrete status 2.

10.02.2021

Added definition to NMEA2000_CAN.h to select CAN device for Arduino DUE

06.02.2021

Added handlers for PGN 129540 GNSS satellites in view
Added new necessary types
Added SetByte for tN2kMsg class.
Added PGN 129540 handler for test example DataDisplay2
Redesigned example MessageSender. Now it is more usefull for testing, since each message can be individually enabled/disabled.
Added PGN 129540 handler for test example MessageSender

15.01.2021

Added better inline ParseN2kEngineDynamicParam to N2kMessages
Copyright update

05.01.2021

Added better engine discrete status handling to N2kMessages

08.10.2020

Fix for 'memcpy' overflow for float reading on N2kMsg.cpp

23.08.2020

Add support for Teensy 4.x

05.08.2020

Add support for Windlass Network Messages PGN 128776, 128777 & 128778 by Paul Reeve

16.07.2020

Fixed setting buffered frame length to min instead of max length on NMEA2000.cpp SendFrame
Added NMEA2000::IsProprietaryMessage
Fixed AddGroupFunctionHandler to allow to add handlers after Open
Added RemoveGroupFunctionHandler to allow dynamically remove handlers on runtime.
Added proprietary message handling to N2kGroupFunction.cpp
Improved N2kDeviceList HandleMsg to see devices, which has been off.
Added FindDeviceByProduct to N2kDeviceList
Extented list of fast packet messages to all known fast packet messages. This also leads to situation that all fast packet messages are known messages and may effect to setting SetHandleOnlyKnownMessages behaviour. To limit known messages, one should have provided list with SetFastPacketMessages.

27.06.2020

Fixed PGN 130314 and PGN 130315 pressure type to signed.
Added pressure enums.

28.01.2019

NOTE! Compatibility change! PGN 127506 TimeRemaining should have been in seconds as it is SI unit. If you have used that on your code, provide value in seconds. Parse function also return in seconds now.
Added Capacity parameter to PGN 127506. I did not made overwrite function without due to above change. So it hopefully wakes you up about the changes.
Fixed MaretronProprietary test on N2kMaretron.cpp
Some comment fixes.

20.10.2019

Added support for Maretron proprietary PGNs 130823,65286, 65287. See N2kMaretron.h. Thanks to Vassilis Bourdakis.
Added proprietary fast packet message test as default. So now proprietary fast packet messages will be automatically parsed right without need to use ExtendFastPacketMessages
Fixed strings on product information. Unused characters will be filled with 0xff.

17.10.2019

Fixed Rate of turn (PGN 127251) and AIS position report ROT (PGN 129038) value multiplier.
Separated N2k enums to own file N2kTypes.h
Fixed PGNs 127251, 127258, 130576 length for sending by padding with reserved. Some devices refuces to listen message, if length is wrong.

07.07.2019

Fixed: PGN 127513 was accidently defined also as single frame message.
Added: Trip fuel consumption, engine PGN 127497.
Added: More PGN:s to default fast packet list.
Updated: Examples MessageSender and DataDisplay2, which can be used for testing messages.

03.03.2019

Added: Charger status PGN 127507.
Added: Possibility to delay ISO address claim. Due to some devices CAN priority, it was sent too fast.
Added: Count for tDeviceList

14.01.2019

Fix: Device list handler fix. Some tools may use source 254 and that was checked wrong.
Fix: Message priorities.

04.08.2018

Fix: NMEA2000.h/NMEA2000.cpp, just in parameter N2kSource type change by mrbubble62

18.07.2018

Added: N2kMessagesEnumToStr.h "exhaust gas" string for temperature sources by mrbubble62.

09.05.2018

Fix: NMEA2000_CAN.h, make ESP32 work with ESP-IDF framework, by Sarfata

10.04.2018

Fix: Handling of humidity PGN 130313.

06.04.2018

Added: Support for ESP32. See also NMEA2000_esp32
Fix: Changed some names to avoid conflicts with some stupid define macros on some environments.

04.04.2018

Fix: NextHeartbeatSentTime initial value.
Added: New example NMEA2000ToNMEA0183. This has been tested on RPi3B, Arduino DUE, Arduino Mega, Teensy.

26.03.2018

Added: Strings for Magnetic Variation enum by mrbubble62

13.03.2018

Added: PGN129033 Local offset

23.02.2018

Port config ability for SockeCAN by Al Thomason

16.02.2018

SetN2kSource for other devices by jpilet

29.01.2018

Added: PGN130576 Small Craft Status / Trim Tab Position definition by Nicholas Agro

15.01.2018

Fix: ParseN2kPGN129284, Index was not initialized to 0, which caused unpredictable read.

07.01.2018

Fix: Fast packet sequence counter must be related to PGN.
Fix: TP message priorities.
Fix: On SetDeviceInformationInstances we need to send ISO address claim, not start adress claim.
Fix: Do not respond any queries during address claim.
Fix: Fixed some messages default priority.
Fix: Responce to Complex Group Function requests.
Fix: Now compiles with different compiler definitions defined on NMEA2000_CompilerDefns.h
Added: Support for sending messages by using Transport Protocol. This is mandatory for NMEA 2000
Updated: License to 2018

02.12.2017

Changes effect only use of tN2kDeviceList and AttachMsgHandler callbacks.
Added FindDeviceByIDs to tN2kDeviceList
Fix: Devicelist did not handle right, if device changed its address higher.
Fix: PNG message handler order problem on tNMEA2000::AttachMsgHandler(tMsgHandler *_MsgHandler);
Fix: If there was NMEA2000 library device with same name, they handshaked both addresses to null. The problem still appears, if both devices will be started at same time. I need to add some random start delay
Cleaned spaces from end of lines on updated code.

29.11.2017

Added PGN 128000 Leeway to N2kMessages.h/.cpp
Fix: Spelling WaterRefereced -> WaterReferenced on N2kMessages.h/.cpp

27.11.2017

Fix some build errors due to missing include statements (did not affect Arduino, only other platforms)

14.11.2017

Fix: Default responces to Complex Group Function.

09.11.2017

Added library.json, thanks for ronzeiller.

31.10.2017

Fix: fill unused chars on fastpacket messages with 0xff
Fix: fill unused chars on message fixed sized strings with 0xff. One sample is e.g. PGN 126996, Product Information.

14.10.2017

Changed tActisenseReader class to handle also Actisense N2k request message types. This type will be used by applications, which sends data through NGT-1.
Updated related examples ActisenseListener and ActisenseListenerSender.
Renamed Min/Max to N2kMin/N2kMax, since Due code had definitions for Min/Max

12.10.2017

Added PGN validity check to the SendMsg()
Changed max/min -> own Max/Min. max/min defines does not exist on other systems and Arduino does not have std Algorithm for all boards.

10.10.2017

Fix: PGN 126992 TimeSource handling.
Fix: Added missing wind reference type.

02.10.2017

Added range parameter for depth PGN 128267.
Added millis() time stamp to N2kMsg clear text Print.
Now responces also Group Function request for PGN lists PGN 126464
Now responces also Group Function request for Product Information PGN 126996
Now responces also Group Function request for Configuration Information PGN 126998
Fix: spelling Sertification -> Certification
Fix: on changing SystemInstance reseted DeviceInstance
Fix: "Group function" responces according to tests with certified Airmar DST800
Fix: Address claiming could go up to 253 and did not went to "cannot claim". Now, if address cannot be claimed, goes to "cannot claim state" and prevents all message output except ISO address claim.
Fix: fast packet response for less than 7 data bytes caused two frames.

26.09.2017

Fixed PGN 128259 parser SOG data type.
DataDisplay2 example update.

31.08.2017

Support for changing configuration information fields InstallationDescription1 and InstallationDescription2 on runtime e.g. with NMEA Reader. Meaning of those fields is define their "installation description". So if you have two engine monitor devices, you can set e.g. InstallationDescription1 field to "Port engine" for one and "Starboard engine" for other. So it is not necessary to hardcode those setting. Of coarse your code must support parameter saving to e.g. EEPROM as with other parameters (see ReadResetInstallationDescriptionChanged, ReadResetAddressChanged and ReadResetDeviceInformationChanged). I have example under construction for handling parameter changes.
Changed some indexes to size_t. This may effect compatibility, if you have used those functions.

31.07.2017

New versions of NMEA2000_due and due_can (see. https://github.com/ttlappalainen/due_can)

29.07.2017

Fixed setting device instances on N2kGroupFunctionDefaultHandlers
Fixed wind PGN 130306 output with reserved field.
New abstract class tNEMA2000:tMsgHandler and functions AttachMsgHandler/DetachMsgHandler. With these you can have multiple handlers. It also allow PGN specific handlers. See how it has been used on example DeviceAnalyzer. Other simple example is under construction.
New class tN2kDeviceList. See more on library reference and on example DeviceAnalyzer.
Improved message type checking. This will be done for every message, so speed in important. For Arduino Mega average test time was dropped from about 90 us to 9 us and for Teensy from 3.5 us to 0.9 us.

26.06.2017

Example updates

ActisenseListenerSender can be used to listen and send data to NMEA 2000 bus. This is almost same as TeensyActisenseListenerSender, but read and forward ports can be chosen with "#define".
ActisenseListener uses now SetN2kCANReceiveFrameBufSize.
Removed FromPCToN2k. ActisenseListenerSender replaces this.

25.06.2017

Fix and cosmetic changes

ForwardStream initialization was accidentaly deleted
Clean code and more debug options.

22.06.2017

Fix and cosmetic changes

Crashed, if ForwardStream was not defined. I accidentaly forgot to comment some debug code.
Definition of tDeviceInformation changed to fixed sized data so that compiler can not mix them.
Added debug definitions to avoid first bug.
Some cosmetic changes and tests.

19.06.2017

Changes due to different revisions of FlexCAN library for Teeansy boards. NOTE! You must update NMEA2000_Teensy library. I also forked and developed FlexCAN library from collin80 and also send pull request for him. Until updated there my fork has more features for use with NMEA2000 library.

13.06.2017

NOTE! Some compatibility changes

!NOTE compatibility change. tProductInformation has been moved inside tNMEA2000 class. If you have defined tProductInformation to PROGMEM as in example BatteryMonitor, you need to change definition const tProductInformation... to const tNMEA2000::tProductInformation... See example BatteryMonitor.
Multi device support should work now. So you can show several devices on bus with single hw. See example MultiDevice.
!NOTE compatibility change. tDeviceInformation has been moved inside tNMEA2000 class. This was used only internally until 11.06.2017 release.

11.06.2017

Added NMEA 2000 mandatory features. Some bug fixes

!NOTE compatibility change. PROGMEM configuration information did not work and actually wasted RAM. You should define each configuration information string alone as PROGMEM and call changed SetProgmemConfigurationInformation. See sample BatteryMonitor
Due to new mandatory features library requires more RAM and program memory. It is possible to squeeze requirements with compiler options. See more info on NMEA2000_CompilerDefns.h.
Added new class tN2kGroupFunctionHandler (N2kGroupFunction.h/.cpp) for NMEA 2000 group function (PGN 126208) handling. Group function can be used to e.g. to set "temperature instance" or "set temperature" fields on PGN 130316.
Added automatic Heartbeat, which is mandatory for certified NMEA 2000 devices. If you do not want it to be sent, you have to set heartbeat interval to 0. Added also function SetHeartbeatInterval, GetHeartbeatInterval and SendHeartbeat.
Added group function handling for PGN 60928 (ISO Address) and PGN 126993 (Heartbeat). Handlers can be found on N2kGroupFunctionDefaultHandlers module.
Added functions ReadResetDeviceInformationChanged, SetDeviceInformationInstances, GetDeviceInformation for checking, setting and reading device instance changes. See more info on document.
Added ISO Multi-packet handling. Changed logic on SetN2kCANBufMsg due this.

05.06.2017

Added PGN 130314 by sarfata.
Added PGN 127245 rudder parser
Fixed Device Information, last bit must be set to 1
Fixed response to ISO Address Claim request. Seems that all new devices respond allways with broadcast instead of caller address.

28.05.2017

Changed default NMEA2000 variable definition in NMEA2000_CAN.h to reference. So now it is possible to refer it in other modules with definition:
{code```}

extern tNMEA2000 &NMEA2000;

```endcode

08.04.2017

Added Binary status report (PGN 127501) handling. See updated examples MessageSender and DataDisplay2.

09.03.2017

Added PGN 129539 support and PGN 129283, 129284 parsers by denravonska.

07.03.2017

Debug mode check for DeviceReady and ParseMessages.

05.03.2017

RPi socketCAN auto selection and MBED compiler portability fix by thomasonw.

08.02.2017

Fixed Heading PGN 127250 parsing

22.01.2017

Replace pointer casting with memcpy to avoid unaligned access, and add endian support. Thanks to denravonska.
Handle for PGN 65240 "Commanded address". E.g. diagnostic device may command your device to change address.

01.01.2017

Document and some example fixes to match library portability changes.

20.12.2016

Added support for PGN 126464L, PGN List (Transmit and Receive). Library will automatically respond to this message. You need only add message lists and call to methods ExtendTransmitMessages and/or ExtendReceiveMessages. See e.g. example TemperatureMonitor.

17.12.2016

Fixes to avoid compiler warnings

16.12.2016

Portability fixes. Thanks to denravonska and thomasonw!
NOTE! compatibility issue! There is no more default stream set on library constuctor. So in case you are using forwarding, you need to setup it (like in examples) NMEA2000.SetForwardStream(&Serial);
This reduces the Arduino dependency, allowing the library to more easily be used on other platforms. Check all changes under https://github.com/ttlappalainen/NMEA2000/pull/3

01.12.2016

License change to MIT for more permissive
Also some started to remove platform dependent code.

12.11.2016

PGN129025 parser added and some fixes by KimBP

11.11.2016

Added support for PGN 127258 - magnetic variation by adwuk.

18.10.2016

Added parsing for PGN 130311 by adwuk. Typo fix for system date comment by sarfata.

19.09.2016

Lot of testing behind - hopefully works now better.
NOTE! New method SetN2kCANSendFrameBufSize. Added buffer for frames to be sent. This takes more RAM and may be critical for low RAM systems.
If frame sending fails, system now buffers frames to be sent automatically and tries to resend them on next call for ParseMessages. With this feature it solved my problem that time to time my MFD could not receive important GNSS or SOG/GOG messages and informed error.
System now also has more reliable response to the Product Information ISO request (PGN 126998). Unfortunately if your system does not poll often enough incoming messages (ParseMessages), you still may loose the request itself. This is specially the case if you system spends some time reading sensors like 1-wire system. Even with 1-wire asynchronous read, it may spend 10 ms interrupts disabled. Within 10 ms there may be about 30 messages on bus.
New methods SetConfigurationInformation and SetProgmemConfigurationInformation. System can now also handle Configuration Information ISO request to (PGN 126998). Default configuration information is saved to PROGMEM.
NOTE! Reload also NMEA2000_due!

17.09.2016

Temporary fix for problem to respond product information ISO request.

12.09.2016

Thanks for people (usauerbrey, OzOns), who noted below problems
NOTE! If you are using NMEA2000_can, remember to update that too!
Fix for ISORequest handling. Now responds allways also for broadcasts.
Some fixes to avoid compiler warnings.
Fix for parsing PGN 127257/Attitude

09.08.2016

NOTE! Fixed PGN 130310, PGN 130311 and added SetHandleOnlyKnownMessages(), which effects backward compatibility. See below.
NOTE! On PGN 130310 and PGN 130311 description says that "Atmospheric pressure in Pascals. Use function mBarToPascal". There was scaling error and now they works like description. After update you have to provide value on Pascals and really use mBarToPascal, if you have your value in mBar.
NOTE! Added SetHandleOnlyKnownMessages(). If you have called SetForwardOnlyKnownMessages(true), library did not handle unknown messages. After update, this effects only message forwarding - as it should have been. So call also SetHandleOnlyKnownMessages(true), if you want to disable any handling for unknown messages.
NMEA 2000 Library reference update.
Added ExtendSingleFrameMessages and ExtendFastPacketMessages. With these one can own list of known messages so that it is not necessary to duplicate message list as, if used only SetSingleFrameMessages and SetFastPacketMessages.
Added discrete status flags for transmission parameters (PGN 127493), thanks for testing Jason.

06.08.2016

Added SetISORqstHandler for setting handler for ISO requests. Thanks thomasonw.

30.07.2016

NMEA 2000 Library reference update.
Added example TeensyActisenseListenerSender. Example contains code, schematics and document.

19.07.2016

Fixed discrete status on engine dynamic parameters (PGN 127489), thanks Jason.
Added new PGN 127257, vessel attitude. Only sending has been tested with NMEA Reader

12.07.2016

Added to API – Optional message lists by thomasonw

25.06.2016

Corrected Battery Current in ParseN2kPGN127508 by thomasonw.

23.03.2016

Additional PGN 129038, PGN 129039, PGN 129285, PGN 130074 support by adwuk.

13.03.2016

Fix of using PROGMEM. Now also product information defined to PROGMEM works right.
Fix of using PROGMEM. Still does not work right with product information in PROGMEM. So all changes after 09.03 are still under validation.
More memory optimization - thanks for thomasonw. Constant message strings has been marked with F(...) moving them to flash instead of RAM.

Note also that there is new function void tNMEA2000::SetProductInformation(const tProductInformation *_ProductInformation); So one can save memory by defining product information to flash by using syntax:

const tProductInformation BatteryMonitorProductInformation PROGMEM={
1300,               // N2kVersion
...

See example BatteryMonitor.ino

12.03.2016

Memory tuning. Currently multi device and user definable message filters has not been implemented, so I changed buffer sizes to minimum.
There is also new function void tNMEA2000::SetN2kCANMsgBufSize(const unsigned char _MaxN2kCANMsgs); to define buffer size for received N2k messages. Note that library has to collect fast packet frames, which may arrive fragmented from different devices, so as default this buffer size has been set to 5. If your device is only sending some data (mode is tNMEA2000::N2km_NodeOnly), you do not need to catch all fast packet messages (if any), so you can set buffer size smaller.

09.03.2016

Additional PGN 127250, PGN 128275 Support by adwuk.

08.03.2016

AVR CAN support by thomasonw.

02.02.2016

NOTE! Updates, which effects backward compatibility. See list below.
PGN 127489, SetN2kPGN127489 EngineOilTemp and EngineCoolantTemp is in Kelvins as in other temperature functions. So add for call to this function CToKelvin(...)
Some function names withing N2kMessages have been changed. Change function names listed below! + SetN2kPGNSystemTime -> SetN2kSystemTime + ParseN2kPGNSystemTime -> ParseN2kSystemTime + SetN2kPGNTrueHeading -> SetN2kTrueHeading + SetN2kPGNMagneticHeading -> SetN2kMagneticHeading
Variable types has been changed on some functions in N2kMessages. So when you get an compiler error about functions in N2kMessages, check carefully all parameter definitions for function from N2kMessages.h.
If you do not have value for some parameter for functions in N2kMessages, use related N2kxxxxNA constant defined in N2kMsg.h. So e.g. if you only have wind speed, call + SetN2kWindSpeed(N2kMsg, 1, ReadWindSpeed(),N2kDoubleNA,N2kWind_Apprent);
If you are reading values from N2k bus, you can now check does some value exist by using function N2kIsNA. So if you e.g. call + ParseN2kOutsideEnvironmentalParameters(N2kMsg,SID,WaterTemperature,OutsideAmbientAirTemperature,AtmosphericPressure); + then check pressure value with + if ( !N2kIsNA(AtmosphericPressure) ) { // It is available, so we can show it!
Added reference document to the documents, which hopefully helps to get started.

23.01.2016

Added PGN 127493 support. NMEA2000_mcp has now interrupt support. Some other fixes.
Added some comments to samples and several new message readers. Also added support for 130316 extended temperature. Added new include N2kMessagesEnumToStr.h for translating library enums to clear text. This is now just for preliminary so I may changes texts in coming future. Added also new examples DataDisplay2.ini and MessageSender.ino. They are extended versions of DataDisplay.ino and TemperatureMonitor.ino.

05.12.2015

Added NMEA2000_CAN.h and some fixes. Library has been originally developed with Arduino Software 1.6.5 On Arduino Software 1.6.6 it is possible to include libraries within included files, so now it is possible to just include one file NMEA2000_CAN.h, which automatically selects right CAN library according. So you can have same code for different hw. Currently supported CAN libraries are mcp_can, due_can and teensy. Note! NMEA2000_CAN.h is now used on examples TemperatureMonitor and WindMonitor!

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