Is there a modbus rtu tester for Raspberry PI?

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Asked 7 years, 11 months ago

Modified 7 years, 11 months ago

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I need a tester much like modpoll but one that runs on Raspbian OS. I need to check if my Raspberry Pi is able to communicate with my modbus slaves.

asked Dec 31, 2015 at 9:11

Shounak Katyayan

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Looks like, modpoll requires some licenced hpp files to compile from the source. You can use libmodbus or something similar (pymodbus on python) to test communication.
– dhruvvyas90
Dec 31, 2015 at 9:44
1

@dastaan I tried pymodbus and other libraries but none of them worked. Thats why I was searching for something that I can directly run on Rpi to check if anything is wrong with hardware...
– Shounak Katyayan
Dec 31, 2015 at 10:17
1

I regularly use libmodbus on my Rpi without any problem. Use this wiki post, github.com/stephane/libmodbus/wiki/Libmodbus-on-Raspberry-pi for step by step guide, how to install libmodbus and then go through test programs. Hope it helps.
– dhruvvyas90
Dec 31, 2015 at 10:23
1

@dastaan I have been trying to make it work on Rpi for weeks now. Are there any configurations that need to be done on RPi? I'll go through the above link.
– Shounak Katyayan
Dec 31, 2015 at 10:29
1

Which port are you using for RTU ? Default Rpi (ie, /dev/ttyAMA0) or using off the usb to serial converter (ie, /dev/ttyUSB0 or /dev/ttyACM0) ? If you're using ttyAMA0, make sure to turn off serial console on raspbian which is turned on by default.
– dhruvvyas90
Dec 31, 2015 at 10:33

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