would have the same sense if the imu 51 were placed near the marking tip as it would if placed at the opposite end of the marker the computer 33 will likely contain a way to reverse the recorded and stored line or drawing formed in addition and especially where the user draws or performs writing not on an even surface the microcontroller 23 will have correction for a changing depth of displacement for example a board may be located on a curved wall without the ability to curve fit and interpret the lines as occurring on a curved surface the computer 33 might distort the drawing where extensive writing occurs on a curved surface the computer 33 should be able to u201c uncurve u201d the surface and form a corrected two dimensional representation of the writing referring to fig3 a closeup detail of the specifics of the connection between the micro controller 23 and the bluetooth module 25 is seen the micro controller 23 has an on board uart module 61 having uart_tx uart_rts amp uart_dtr outputs and has uart_rx uart_cts amp uart_dts inputs conversely the bluetooth module 25 has an on board universal synchronous asynchronous receiver transmitter usart module 63 having rxd cts amp dsr inputs and txd rts amp dtr outputs the bluetooth module 25 is also known as blu 2i and contains a complete bluetooth interface and requires no further hardware to implement full bluetooth type communication the bluetooth module 25 has an integrated high performance antenna together with all radio frequency rf and baseband circuitry needed the.