I'm writing a sketch that use a MEMS sensor (ADXL345 in this case but it will be a start point for more sensors like this like MPU6050). this chip can raise an interrupt when: inactivity sensed,activity sensed,tap,double tap,free fall. so the reading of the XYZ values with a leading char that represent the event sensed (I for inactivity and etc ) are going to a serial MySensor GW and from there to the controller (right now I'm using MYSController). *EDIT I found out that values can be negative so I just sending the decimal numbers as is...