====== Karmon communication prototocl ======

===== What needs to be communicated =====
  * RPM
    * Every .5 secs
    * No Ack
  * Motor Temp
    * Every minutes or when peaks are reached
    * No Ack
  * Battery cells voltages
    * Whenever updated
    * No Ack
  * Lap count trigger (From remote to car)
    * Each time button is pressed
    * No Ack
  * New lap (from kar to screen)
    * Each time detected
    * No Ack

===== Payloads =====

==Representation==
  * lowercase means bit
  * Uppercase means byte
  * letter link to description
  * example :
    * [ttttRR] means 4 bits for message **t**ype followed by 2 bytes for **r**pm.

==Message types==
  * RPM : [0001RR]
    * 4 bits for message type
    * 2 bytes for RPM (unsigned int)

  * Motor Temperature : [0010TT]
    * 4 bits for message type
    * 2 bytes for temperature (unsigned int = T*100)

  * Cell voltage : [0011(nnnV){1,8}]
    * 4 bits for message type
    * repetition of 1 to 8 times
      * 3 bits for cell number
      * 1 byte for voltage (unsigned char = (V-2.5) * 100)
        * Range from 2.5V to 5V with 2 digit precision
  * Lap Trigger : [0100]
  * New Lap : [0101]