Dear Sir, We have completed several hardware and software project s using WiFi, Ethernet, USB, Bluetooth, GSM and RF using PIC, Atmel, TI ICs. Please see our profile for our past and current projects. We have resonantly done android app communication with bluetooth device connected to Arduino. you can see it on our portfolio. We can start your project immediately. We will provide following things . 1. Firmware for Arduino. 2. prototype building instructions. 3. customized android app. Please contact us for more clarifications. Best regards, Lasantha Prasad