Arduino Receive and Format Data!

Hello all, I need someone to put a function to work. I build a panel with 1 keypad, 3 LEDs, 1 button and 1 I2C 20x4 LCD. Also I'm using a state machine for the functions. The panel talks to the main Arduino with serial with simples digits of control: % to start $ to stop. This is an example of main Arduino function to turn on and off a LED: if (rxBuffer[0] == '%') { if (rxBuffer[1] == 'R' && rxBuffer[2] == 'H' && rxBuffer[3] == '$') digitalWrite(outLedVM, HIGH); if (rxBuffer[1] == 'R' && rxBuffer[2] == 'L' && rxBuffer[3] == '$') digitalWrite(outLedVM, LOW); } So when the main send %VMH$ the panel arduino understand % = start, R from red, and (H or L) from High or Low, and do the desired with the Red LED. However when I'm using big arrays to transmit a value for example the code locks. I have also a functions that sends me the compass value (where C from compass): if (rxBuffer[0] == '%' && rxBuffer[1] == 'C' && rxBuffer[5] == '$') { strBuffer = String(rxBuffer[2]) + String(rxBuffer[3]) + String(rxBuffer[4]); compassValue = [login to view URL](); [login to view URL](compassValue); clearBuffer(); } I have a software to emulate the main Arduino and send the frame. What I need from you? FOUR functions THAT WORK: 1) Send right encoder value: -99.999.999 to +99.999.999 2) Send left encoder value: -99.999.999 to +99.999.999 3) Send GPS latitude: -99.999 to +99.999 4) Send GPS longitude: -99.999 to +99.999 For the 1 and 2, I need the long and the string to print into a LCD For the 3 and 4, I need only the string to print into a LCD Note: Timeframe is realy important, I need it fast. Delay can cause dispute in my favor, accepting the project you accept this term. PLEASE IF YOUR BID WILL BE GRATER THAN 60USD DO NOT PLACE IT, PLEASE RESPECT - I WILL NOT HIRE YOU AND YOU WILL MESS THE BIDS.