brunobronosky modified a comment on discussion Engineering 🇬🇧

brunobronosky posted a comment on discussion Engineering 🇬🇧

I was told by the manufacturer that it is port 6000 that handlesModBus. I have captured it with a MITM Proxy but I cannot make any sense of it. I'm hoping that the modbus interface is mounted as a serial device somewhere. The file has: [SysCom]. Linux.Devicefile=/dev/ttymxc. And the filesystem has: /dev/ttymxc /dev/ttymxc0 /dev/ttymxc1 /dev/ttymxc2 /dev/ttymxc3 /dev/ttymxc4 I have tried to pipe printf $status (all those vars) to those devices, but I get either nothing, or it hangs when I then try...

brunobronosky posted a comment on discussion Engineering 🇬🇧

I was told by the manufacturer that it is port 6000 that handlesModBus. I have captured it with a MITM Proxy but I cannot make any sense of it. I'm hoping that the modbus interface is mounted as a serial device somewhere. The file has: [SysCom]. Linux.Devicefile=/dev/ttymxc. And the filesystem has: /dev/ttymxc /dev/ttymxc0 /dev/ttymxc1 /dev/ttymxc2 /dev/ttymxc3 /dev/ttymxc4 I have tried to pipe printf $status (all those vars) to those devices, but I get either nothing, or it hangs when I then try...

brunobronosky modified a comment on discussion Engineering 🇬🇧

I have purchased a piece of hardware that has a RS-485/ModBus interface in it which is used by codesys. I know nothing about codesys, I only heard of it when I ssh'd into the piece of hardware. I'm very limited in my ability to investigate the environment because it is running busybox Linux and the tools are scant. I know that a GUI the manufacturer provided is connecting on ports 22000 & 6000 and they are sending these commands on ModBus: activation="\x09\x10\x03\xE8\x00\x03\x06\x00\x00\x00\x00\x00\x00\x73\x30";...

brunobronosky posted a comment on discussion Engineering 🇬🇧

I have purchased a piece of hardware that has a RS-485/ModBus interface in it which is used by codesys. I know nothing about codesys, I only heard of it when I ssh'd into the piece of hardware. I'm very limited in my ability to investigate the environment because it is running busybox Linux and the tools are scant. I know that a GUI the manufacturer provided is connecting on port 22000 and they are sending these commands on ModBus: activation="\x09\x10\x03\xE8\x00\x03\x06\x00\x00\x00\x00\x00\x00\x73\x30";...