RTU Modbus sniffer #19
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Can this application work also as Modbus sniffer? I would like to listen the conversation between two devices RTU Master<->Slave, so I don't want my PC acts as Master, just listen and decode what they send. |
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Replies: 3 comments 3 replies
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No, there is no such functionality. |
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to bring this up again. since we have the show traffic option it would be nice to have the ability to show the bus data as slave. backougrund ist: we have a modbus to LoRaWAN adapter which acts as master (asks for specific content on the bus) but ALSO transmitts EVERY data that is transfered from other masters/slaves on the bus. |
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You can try with Wireshark + additional feature https://github.com/jzhvymetal/WiresharkSerialAdapter. There is also a practical manual from ABB: https://library.e.abb.com/public/053acd5e47a04d938e15537a5d253e74/Technical_Note_179_WiresharkForModbusRTU.pdf?x-sign=zHGIPySTjLhl7dpEkso9HT4DePnDDowfPgQ6XIJ7IXlmfbUxtfYU5tLt4aiRTA3M. Similarly you an also snif BACnet MS/TP: https://library.e.abb.com/public/2b037b07870b4af3831e88afe0bcf1a2/LVD-EOTKN123U-EN_WiresharkforBACnetMSTPtrafficcapture_REVA.pdf |
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Application show traffic between modbus client (master) and server (slave). There is no option to sniff other traffic. |
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it would be usefull. |
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There is no plan to do this. |
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No, there is no such functionality.