Sample: plot accel data

accel.ino

#include <M5StickC.h>

float _x, _y, _z;

void setup() {
  M5.begin();
  M5.Imu.Init();
  M5.IMU.getAccelData(&_x, &_y, &_z);
}

static bool flag(float d) {
  const auto thres = 0.04f;
  return d > thres;
}

static int flag(float dx, float dy, float dz) {
  return (flag(dx) || flag(dy) || flag(dz)) ? 5 : 0;
}

void loop() {
  float x, y, z;
  M5.IMU.getAccelData(&x, &y, &z);

  float dx = ::abs(x - _x);
  float dy = ::abs(y - _y);
  float dz = ::abs(z - _z);

  Serial.printf("dx,dy,dz,flag\r\n");
  Serial.printf("%5.2f,%5.2f,%5.2f,%d\r\n", dx, dy, dz, flag(dx, dy, dz));

  _x = x;
  _y = y;
  _z = z;
  ::delay(50);
}