Use Libmodbus library

[davidino]

Goodmorning to all,
I've build a custom OS image and sdk generated with yocto poky-morty so that I could cross compile my applications for a Raspberrypi3.
Qt version is 5.7.1. I've done the folling steps:

• Yocto generated the following modbus library files:
  libmodbus.so
  libmodbus.la
  libmodbus.so.5
  libmodbus.so.5.0.5
  saved in the following path of my host sytem:
  /opt/poky/sdk-2.2.2/sysroots/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/usr/lib

• I've downloaded the following modbus qt wrapper project:
  https://github.com/kiug/QModbus

• When I try to compile the project I get the error:
  modbus.h: No such file or directory

• I tried to include the external library, giving the path for libmodbus.so reported above but I get the same error.

Can you help me?
Thank you.

[SGaist]

Hi,

Why not use the QtSerialBus module ?

[davidino]

Hello StGaist,
thank you again for your answer. I didn't know of this library, and it looks simpler to use than the qt wrappeer that I found, I'll definitely pass to this.

Just for information for those ones who use Yocto, the problem was that I had to add the following for seeing modbus.h:
INCLUDEPATH += $$PWD/../../../../opt/poky/sdk-2.2.2/sysroots/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/usr/include/modbus
DEPENDPATH += $$PWD/../../../../opt/poky/sdk-2.2.2/sysroots/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/usr/include/modbus
After that I had the following problem:
cannot find /lib/arm-linux-gnueabihf/libpthread.so.0
and found solution here:
https://stackoverflow.com/questions/14207189/crosstools-ng-cant-find-pthread-so

Thank you again StGaist :)