Hello!
To dear client
Thanks for sharing your project.
I am a firmware and PCB expert.
I have many experience in LED, OLED, LCD field.
I have also wonderful 8+ years experiences in IoT projects using Arduino, ESP8266, BLE, BT, servo and very familiar with ARM, AVR, PIC.
I can write PCB, firmware and mobile app for your.
I'm sure that you can get more than you expected because of my skill and hard work.
Frankly speaking, i am new in the freelancer site but I think you don't need to worry about my skill.
Now I am really for my reviews, not budget.
Let's discuss more with chatting.
If you want, I can show my past product similar as your project.
Best Regards