Hey, my name's Jorge, I am an electronics engineer with experience writing firmware for embedded devices.
I have a broad experience programming using Arduino devices. I have checked the problem you are facing with the serial strings, and I am able to solve it, as I have already solved this problem on previous projects.
This will take me a couple of hours, I am sure of that.
Please contact me to discuss any possible questions you have for me, I'd be glad to answer any possible questions in order to start with your project right away. Thanks for your time.