# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

"""Display compass heading data five times per second"""

import time
from math import atan2, degrees

import board

import adafruit_lsm303dlh_mag

i2c = board.I2C()  # uses board.SCL and board.SDA
# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
sensor = adafruit_lsm303dlh_mag.LSM303DLH_Mag(i2c)


def vector_2_degrees(x, y):
    angle = degrees(atan2(y, x))
    if angle < 0:
        angle += 360
    return angle


def get_heading(_sensor):
    magnet_x, magnet_y, _ = _sensor.magnetic
    return vector_2_degrees(magnet_x, magnet_y)


while True:
    print(f"heading: {get_heading(sensor):.2f} degrees")
    time.sleep(0.2)