Error building Pymodbus

Legato Linux distribution (Yocto project)
#1

Facing error building pymodbus:

Initialising tasks: 100% |#######################################| Time: 0:00:00
NOTE: Executing SetScene Tasks
NOTE: Executing RunQueue Tasks
ERROR: pymodbus-2.5+gitAUTOINC+731b080df0-r0 do_compile: python setup.py build execution failed.
ERROR: pymodbus-2.5+gitAUTOINC+731b080df0-r0 do_compile: Function failed: do_compile (log file is located at /home/pankaj/Documents/wp76xx-linuxsrc-rel13.1/yocto/build_bin/tmp/work/armv7a-neon-poky-linux-gnueabi/pymodbus/2.5+gitAUTOINC+731b080df0-r0/temp/log.do_compile.15160)
ERROR: Logfile of failure stored in: /home/pankaj/Documents/wp76xx-linuxsrc-rel13.1/yocto/build_bin/tmp/work/armv7a-neon-poky-linux-gnueabi/pymodbus/2.5+gitAUTOINC+731b080df0-r0/temp/log.do_compile.15160
Log data follows:
| DEBUG: Executing shell function do_compile
| Traceback (most recent call last):
| File “setup.py”, line 28, in
| from pymodbus.utilities import IS_PYTHON3
| File “/home/pankaj/Documents/wp76xx-linuxsrc-rel13.1/yocto/build_bin/tmp/work/armv7a-neon-poky-linux-gnueabi/pymodbus/2.5+gitAUTOINC+731b080df0-r0/git/pymodbus/utilities.py”, line 8, in
| from pymodbus.compat import int2byte, byte2int, IS_PYTHON3
| File “/home/pankaj/Documents/wp76xx-linuxsrc-rel13.1/yocto/build_bin/tmp/work/armv7a-neon-poky-linux-gnueabi/pymodbus/2.5+gitAUTOINC+731b080df0-r0/git/pymodbus/compat.py”, line 15, in
| import six
| ImportError: No module named six
| ERROR: python setup.py build execution failed.
| WARNING: /home/pankaj/Documents/wp76xx-linuxsrc-rel13.1/yocto/build_bin/tmp/work/armv7a-neon-poky-linux-gnueabi/pymodbus/2.5+gitAUTOINC+731b080df0-r0/temp/run.do_compile.15160:1 exit 1 from ‘exit 1’
| ERROR: Function failed: do_compile (log file is located at /home/pankaj/Documents/wp76xx-linuxsrc-rel13.1/yocto/build_bin/tmp/work/armv7a-neon-poky-linux-gnueabi/pymodbus/2.5+gitAUTOINC+731b080df0-r0/temp/log.do_compile.15160)
ERROR: Task (/home/pankaj/Documents/wp76xx-linuxsrc-rel13.1/yocto/meta-openembedded/meta-python/recipes-devtools/python/pymodbus_2.5.2.bb:do_compile) failed with exit code ‘1’
NOTE: Tasks Summary: Attempted 655 tasks of which 654 didn’t need to be rerun and 1 failed.

Python six is already installed in the image though local.conf
IMAGE_INSTALL_append_pn-mdm9x28-image-minimal = " python-six python-paho-mqtt"

pymodbus recipe is created using the recipetool in Bitbake command:

recipetool -d create -o yocto/meta-openembedded/meta-python/recipes-devtools/python/pymodbus_2.5.2.bb GitHub - riptideio/pymodbus: A full modbus protocol written in python

Attached is the recipe which is giving error .

looking for any modifications required to build the recipe
pymodbus_2.5.2.bb (4.1 KB)

#2

how about adding the following recipe in
./meta-swi/meta-swi-mdm9x28/recipes-core/images/mdm9x28-image.inc

IMAGE_INSTALL_append =" pymodbus"

#3

@jyijyi

Will try the suggestion but I think it should not make a difference as "IMAGE_INSTALL_append_pn-mdm9x28-image-minimal mentions the correct target to add the recipe.

#4

In case if python six is not installed I believe Rdepends should take care of providing a error but it doesn’t. Below is the RDEPENDS from the recipe:

RDEPENDS_${PN} += “python-2to3 python-contextlib python-core python-crypt python-distutils python-io python-json python-lang python-logging python-math python-netserver python-setuptools python-shell python-six python-threading python-unittest”

image
image1279×132 13.7 KB

So ideally I should have got a build error with no provider for Python-six , but rather I see error reported on import statement in compat.py

I believe may have to add some tasks intially before compiling pymodbus

#5

I found that I cannot add
IMAGE_INSTALL_append =" python-pymodbus"

it seems it is not officially supported.

#6

Hi Pankaj,

If you are trying to make a Modbus master, maybe have a quick read of this wiki link,
https://bitbucket.org/m2mconnectivity/pyrtedoc/wiki/Modbus%20master
If it helps, here is the home of wiki which tries to include Python3 and popular modules(such as pyserial, requests) without rebuilding Linux image for Legato modules/FX30s,
m2mconnectivity / PyRTEdoc / wiki / Home — Bitbucket

#7

@billzhou

Yes looking for Modbus master this one looks to be helpful the implementation seems to be based on Minimal Modbus which supports only RTU any suggestions for modbus TCP.

#8

Hi Pankaj,

Here pls find the guide on how to install Python modules without rebuilding image and it uses PyModbus as example,
m2mconnectivity / PyRTEdoc / wiki / Install a Python module — Bitbucket

Hope it helps.

#9

@billzhou

Can you let me know where do we get the pyrte application?

Thanks

Pankaj Sant

#10

Hi Pankaj,

The download page of PyRTE looks not ready. If you’d need it now, please message me your email, with your FX30/WP model and firmware version, I’d be happy to arrange you the installers.

#11

@billzhou ,

you can email me the installers for wp76 rel13.1 firmware on pankajrsant@gmail.com