Algorithm 1. Pseudocode of the detection algorithm.

value = 0.0

for N do

value = value + sensor_sample_data

sleep SLEEP_TIME

min_value = max_value = value / N

samples_count = 0

always

value = sensor_sample_data

if value > max_value

max_value = value

if value < min_value

min_value = value

if absolute(max_value-min_value) > MINMAX_THRESHOLD

detection = true

max_value = min_value = value

else

detection = false

samples_count = samples_count + 1

if samples_count = FORGET_THRESHOLD

samples_count = 0

max_value = max_value -1

min_value = min_value +1

sleep SLEEP_TIME