To be able to work with Arduino in Simulink you have to have Simulink Support Package for Arduino installed.. To be able to create and compile the code in Simulink external mode you will need ...

Old Simulink® driver blocks for two Arduino motor shields. NOTE: The last time I have used this package was in 2014. Franky de Bruyne managed to get it to work for MATLAB 2016b aftes several tweaks, ...