From fb1278bc27a0f065cd0692660c925417f55afc75 Mon Sep 17 00:00:00 2001
From: Rousseau Vincent <vincent.rousseau@irstea.fr>
Date: Mon, 7 Jan 2019 11:24:04 +0100
Subject: [PATCH] Filter values every hour
---
environmental_sensors.py | 33 ++++++++++++++++++++++++---------
1 file changed, 24 insertions(+), 9 deletions(-)
diff --git a/environmental_sensors.py b/environmental_sensors.py
index f18b351..e89e80b 100644
--- a/environmental_sensors.py
+++ b/environmental_sensors.py
@@ -1,24 +1,40 @@
from sense_hat import SenseHat
from datetime import datetime
+from datetime import timedelta
import time
from pathlib import Path
import csv
+import numpy as np
sense = SenseHat()
def float_format(f):
return '{:.2f}'.format(f)
+def float_mean(values):
+ return float_format(np.mean(values))
+
def get_data():
- humidity = float_format(sense.get_humidity())
- temp_humidity = float_format(sense.get_temperature_from_humidity())
- #print("Humidity sensor : {} %rH , {} °C".format(humidity, temp_humidity))
+ humidity = []
+ temp_humidity = []
+ pressure = []
+ temp_pressure = []
+ # Store sensor values every second during one hour
+ for _ in range(3600):
+ humidity.append(sense.get_humidity())
+ temp_humidity.append(sense.get_temperature_from_humidity())
+ pressure.append(sense.get_pressure())
+ temp_pressure.append(sense.get_temperature_from_pressure())
+ time.sleep(1)
- pressure = float_format(sense.get_pressure())
- temp_pressure = float_format(sense.get_temperature_from_pressure())
+ #print("Humidity sensor : {} %rH , {} °C".format(humidity, temp_humidity))
#print("Pressure sensor : {} Millibars , {} °C".format(pressure, temp_pressure))
-
- return [datetime.now().timestamp(), humidity, temp_humidity, pressure, temp_pressure]
+ # Get the mean value during the hour
+ return [(datetime.now()-timedelta(minutes=30)).timestamp(),
+ float_mean(humidity),
+ float_mean(temp_humidity),
+ float_mean(pressure),
+ float_mean(temp_pressure)]
# Create folder to store the data
data_folder = Path('./data')
@@ -26,7 +42,7 @@ data_folder.mkdir(parents=True, exist_ok=True)
try:
while(True):
current_month = datetime.now().month
- file_date = datetime.now().strftime('%Y_%m_%d_%H_%M')
+ file_date = datetime.now().strftime('%Y_%m_%d_%H')
file_name = data_folder/str('sense_hat_data_' + file_date + '.csv')
with file_name.open('w') as csvfile:
writer = csv.writer(csvfile)
@@ -34,7 +50,6 @@ try:
while(True):
writer.writerow(get_data())
- time.sleep(1)
if(current_month != datetime.now().month):
break
--
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