public static string decodePID(byte high, byte low)
        {
            // high and low are the two bytes of the code from OBD port
            /*
            Define an array of bitmasks to pull out code letter and numbers
                        11000000,
                        00110000,
                        00001111,
                        11110000,
                        00001111
             * */
            byte[] mask = new byte[] { 0xC0, 0x30, 0x0F, 0xF0, 0x0F };
            // Lookup array for binary -> PID letter conversion.
            char[] type = new char[] { 'P', 'C', 'B', 'U' };
            // define placeholder for decoded values
            char[] retStr = new char[5];
            // Look up code type by top two bits
            retStr[0] = type[(high & mask[0]) >> 6];
            // convert remaining digits
            retStr[1] = (char)(((high & mask[1]) >> 4) + 48);
            retStr[2] = (char)((high & mask[2]) + 48);
            retStr[3] = (char)(((low & mask[3]) >> 4) + 48);
            retStr[4] = (char)((low & mask[4]) + 48);
            // build string and return
            return new string(retStr);
        }