typedef struct Stepper
{

        int direction;            // Direction of rotation
        unsigned long step_delay; // delay between steps, in ms, based on speed
        int number_of_steps;      // total number of steps this motor can take
        int step_number;          // which step the motor is on
        uint32_t last_step_time; // time stamp in us of when the last step was taken
        int steps_left;          // steps left to take
        uint8_t operate;         //operating mode
        uint8_t flag;           //working flag
        float flow;             // percentage valve open


}st_mot;