Hello ,
i need help, i don,t know how to start. I need to communicate with external device over serial, more information in attachment. Could you write example code line, serieal.write(.....) , with example instruction for extelnal device. Thanks
Use the forum Google search function in the upper right of this page to search for the key words of your project. You will probably find many similar previous project discussions and code to get you started.
I have searched but i haven't found anything similar.