Problem with viewing custom Mavlink message in Mission Planner

[Nikita P]

Hello, Im trying to send info from sensors via Mavlink message to Mission Planner.

So what have I done:

1. I wrote custom message in ~/ardupilot/modules/mavlink/message_definitions/v1.0

        <message id="227" name="ENGINE_INFO">

            <description>Engine Info</description>

            <field name="aero_term1" type="float">Thermopara1</field>

            <field name="aero_term2" type="float">Thermopara2</field>

            <field name="aero_term3" type="float">Thermopara3</field>

            <field name="aero_voltage" type="float">Voltage</field>

            <field name="aero_rpm" type="float">RPM</field>

2. After compilation I can see command to send 

  

    mavlink_msg_engine_info_send(chan,term1,term2,term3,volt1,rpm1);

 Which I placed in GCS_Mavlink.cpp

3. I have made new cpp file with my code which I stored in ArduPlane folder to send.

  I can see my info in hal.console via 

            hal.console->printf("term1: %f, term2: %f, term3: %f, volt1: %f, rpm1: %f\n",term1, term2, term3, volt1, rpm1);

But MissionPlanner says: INFO MissionPlanner.MAVLinkINterface - unknown packet type 227;

What should I do?

Best regards, Nikita

[Tom Pittenger]

You've added a custom message and sent it, but mission planner doesn't know how to decode it. Add the same xml stuff on the mission planner side and compile it: https://github.com/ArduPilot/MissionPlanner/tree/master/ExtLibs/Mavlink/message_definitions

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[Nikita P]

Thanks for the answer.

Wiki page "Building Mission Planner with Visual Studio" have wrong info about Visual Studio 2013; I almost lost one day setting VS2013 with this project; until I found project is tied to VS2015.

I have added info about my msg in ExtLibs\Mavlink\message_definitions\ardupilotmega.xml

Firstly I tried to compile only Mavlink module, after that I took MAVLink.dll (88 Kb) from ExtLibs\Mavlink\bin\Debug folder and copied it to installed Mission Planner. After that I didnt see any messages about unknown message in debug console, but I cant see any info in "Status" tab in "Flight Data" or in "Config\Tuning".

After that I tried to compile full Mission Planner. The size of MAVLink.dll was 86 Kb; and I received new errors in Debug Console:

0.00,0.00,0.00,0,50, - thats is full transferred message

term1: 0.000000, term2: 0.000000, term3: 0.000000, volt1: 0.000000, rpm1: 50.00000 - that is my variables after parsing of received msg

INFO MissionPlanner.MAVLinkInterface - Mavlink Bad Packet (Len Fail) len 28 pkno 227

INFO MissionPlanner.MAVLinkInterface - mav 1-1 seqno 21 exp 20 pkts lost 1

INFO MissionPlanner.MAVLinkInterface - Mavlink Bad Packet (Len Fail) len 28 pkno 227

INFO MissionPlanner.MAVLinkInterface - mav 1-1 seqno 45 exp 44 pkts lost 1

Thanks in advance, Nikita.

воскресенье, 25 сентября 2016 г., 21:42:23 UTC+5 пользователь Tom Pittenger написал:

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[Hamish Willee]

Hi Nikita P

Can you please add more information about the error in the documents (and how you would fix it) in the wiki issue tracker: https://github.com/ArduPilot/ardupilot_wiki/issues/559

Cheers

H