p44mbcd
"p44mbcd" is a free (opensource, GPLv3) daemon for a modbus device with touch lcd grahical user interface.
p44mbcd is based on a set of generic C++ utility classes called p44utils, which provides basic mechanisms for mainloop-based, nonblocking I/O driven automation daemons, including libmodbus and LittlevGL integration. p44utils, lvgl and lv_drivers are included as submodules into this project, a heavily modified libmodbus is included as part of p44utils.
License
p44mbcd is licensed under the GPLv3 License (see COPYING).
(c) 2019-2020 by Lukas Zeller / plan44.ch