encse

# The elves have bolted two tiny monochrome status panels onto the front of 
# Santa’s workshop router — one stacked above the other — to show diagnostics 
# during sleigh-season load spikes.

# Unfortunately, the firmware team “optimized” everything into raw I2C traffic
# logs, and now the only way to see what the panels displayed is to replay the 
# messages and reconstruct the pixels yourself.

# You’re given a transcript of I2C messages sent to both screens.

encse

import matplotlib.pyplot as plt
import numpy as np
from scipy import signal


# Source: https://github.com/guillaume-chevalier/filtering-stft-and-laplace-transform
def butter_lowpass_filter(data, cutoff_freq, sampling_freq, order=4):
    nyq_freq = 0.5 * sampling_freq
    normal_cutoff = float(cutoff_freq) / nyq_freq
    b, a = signal.butter(order, normal_cutoff, btype='lowpass')