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Exception function codes are constructed by adding +0x80, which may cause a wrap-around for illegal function codes.

Status: Open.

#845 In stephane/libmodbus;

· MrAlaskan opened on Apr 13, 2026

FC 0x11 (Report Slave ID) Is Incorrectly Handled Over Modbus TCP (Serial-Line-Only Function Exposed)

Status: Open.

#844 In stephane/libmodbus;

· MrAlaskan opened on Apr 13, 2026

Slowloris-Style DoS in Modbus TCP Receive Path on Windows

Status: Open.

#843 In stephane/libmodbus;

· MrAlaskan opened on Apr 13, 2026

libmodbus 3.1.12 does not connect in windows

Status: Open.

#842 In stephane/libmodbus;

· hdabis1234 opened on Feb 17, 2026

[Windows RTU] modbus_receive() ignores response/byte timeout unless indication_timeout is set

Status: Open.

#822 In stephane/libmodbus;

· draculamx opened on Sep 1, 2025

Conflict with between defined const and enum.

Status: Open.

#821 In stephane/libmodbus;

· pavliqme opened on Aug 26, 2025

Tests are failing on slow machines or on architectures with unreliable SMP timers

Status: Open.

#815 In stephane/libmodbus;

· bigon opened on Jul 8, 2025

A violation regarding the specifications for the protocol identifier.

Status: Open.

#814 In stephane/libmodbus;

· ProtocolSpecCheck opened on Jun 30, 2025

A bug that violates the specification of the length field

Status: Open.

#810 In stephane/libmodbus;

· jyjsunny opened on Jun 5, 2025

Compilation error with MinGW and GCC 14

Status: Open.

#809 In stephane/libmodbus;

· StalderT opened on Jun 3, 2025

Floating point byte order does not round-trip

Status: Open.

#807 In stephane/libmodbus;

· johannes1971 opened on May 1, 2025

How to select the network adapter for Modbus TCP in Windows?

Status: Open.

#806 In stephane/libmodbus;

· wayneenterprise1 opened on Apr 30, 2025