int32_t ground_pres; /* 8 average pres on pad */
int16_t ground_accel; /* 12 average accel on pad */
int16_t accel_plus_g; /* 14 accel calibration at +1g */
int16_t accel_minus_g; /* 16 accel calibration at -1g */
int32_t ground_pres; /* 8 average pres on pad */
int16_t ground_accel; /* 12 average accel on pad */
int16_t accel_plus_g; /* 14 accel calibration at +1g */
int16_t accel_minus_g; /* 16 accel calibration at -1g */