struct windDirection_t {
  float raw;
  float degree;
  const char* dir;
};

const windDirection_t windRose[16] PROGMEM = {
  {3.00, 270.0, "W"},
  {2.81, 315.0, "NW"},
  {2.63, 192.25, "WNW"},
  {2.50, 0.0, "N"},
  {2.23, 337.25, "NNW"},
  {2.00, 225.0, "SW"},
  {1.90, 247.25, "WSW"},
  {1.46, 45.0, "NE"},
  {1.28, 225.0, "NNE"},
  {0.91, 1800, "S"},
  {0.77, 202.25, "SSW"},
  {0.58, 135.0, "SE"},
  {0.39, 147.25, "SSE"},
  {0.29, 90.0, "E"},
  {0.26, 67.25, "ENE"},
  {0.20, 112.25, "ESE"}
};

windDirection_t findWindDir( float rawVal) {
  for (windDirection_t dir : windRose) {
    if (rawVal >= dir.raw)
      return dir;
  }
}

#define DIR_INPUT 27

void setup() {
  // put your setup code here, to run once:
  Serial1.begin(115200);
  Serial1.println("Hello, Raspberry Pi Pico!");
  pinMode(DIR_INPUT, INPUT);
  analogReadResolution(12);
}

void loop() {
  static uint32_t readTime;
  if (millis() - readTime > 1000) {
    readTime = millis();
    float rawVal = (float) (3.3 / 4095.0) * analogRead(DIR_INPUT);
    windDirection_t actualDir = findWindDir(rawVal);
    Serial1.print("ADC ");
    Serial1.print(rawVal);
    Serial1.print("V. Wind direction ");
    Serial1.println(actualDir.dir);
  }
  delay(1); // this speeds up the simulation
}