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libmodbus is an old project but I never wrote a post about it, 2008 is the right year! I recently released 2 new versions to include some bug fixes: libmodbus 1.2.2 (2007-11-12) Fix #161989 (Konstantinos Togias) Serial device paths more than 10 chars long (eg. /dev/ttyUSB0) don’t fit to modbus_param_t -> device char[11] var. Structure is also bit better ‘packed’ to conserve memory (see the trunk for a real enhancement). ... Read more …