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Questions tagged [libmodbus]

libmodbus is a library written in C to communicate with devices which implement the modbus interface. libmodbus supports RS485(serial) and TCP/IP(network) mode of communication.

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Why I still get the x86-64 .so file, althrough using the ./configure -- host=arm-none-linux-gnueabihf?

I want to using libmodbus on PICO whhich is ARM. I'm using a x86-64 ubuntu PC. Is that right to use ./configure -- host=arm-none-linux-gnueabihf ? and make,make install. No errors after these 3 steps. but I checked /usr/local/lib/, But the…
Limin
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Filter messages by slave address

Just learning how the libmodbus works. I am using libmodbus v3.1.7 tag from git repository. Wrote a very simple test, included as reference (error management has been removed for clarity): ctx = modbus_new_rtu("/dev/ttyUSB0", 115200, 'N', 8,…
aicastell
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Separate connect function for libmodbus

I am trying to group the operation under libmodbus for Mod-bus connection and get-value into two simpler function as below. However, it always cause Segmentation fault (core dumped) when I try to get value from the device.(get_float,…
Troy Chan
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Timeout Modbus RTU Devices after reconnect RS232/RS485 Adapter

I've problems with a MODBUS RTU connection to devices after a disconnect & reconnect of the RS232. The system is build up the following way: MODBUS RTU device with A+ & B- clamps (no C = GND available, e.g. electricity meter SDM120, but problem…
Achim
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Libmodbus library not found when trying to compile mbrtu

I tried: cd ~ git clone git://github.com/stephane/libmodbus cd libmodbus ./autogen.sh ./configure --enable-static make sudo make install sudo cp ./src/.libs/libmodbus.a /usr/local/lib/ to download, compile and install the libmodbus library. Now I…
Nord
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Is it possible to implement a Modbus Master based on libmodbuspp which uses RTU over TCP to talk to RTU slaves behind a TCP/RTU gateway?

I'm developing a C++ Modbus application which already uses the libmodbuspp library to implement a Modbus Master device to query Modbus Slaves either in TCP or RTU modes (respectively for devices connected over an Ethernet network or RS-232/485…
Claudio
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