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modbussniffer's Introduction

ModbusSniffer

Modbus RTU packet sniffer

Wrapper around pymodbus to print all packets on bus from either slave or master. Useful for sniffing packets between two devices to ensure correct operation.

Simple command line tool that prints results to the terminal.

modbussniffer's People

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Forkers

pppranik engr-ehtisham ekristoffe gerom76 kontham12021991

modbussniffer's Issues

Is this project dead?

I have tried a bit to make things working, but I was not fully successful. My biggest problem is to recognize request / response frames.

Performance of Modbus sniffer

Hi,

I am trying to sniff data of a client which sends requests @660ms rate. Baudrate is 9600 and serial socket timeout is 1s and I am running the Modbus sniffer on rpi CM4 (Linux 11). Using sniffer, I see only half of the requests are processed. For the rest of the requests, framer checker fails or frames are not ready. Is it because client is too fast for the sniffer to process or some timeout needs to be reduced?
sniffer_error

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