DS18B20 waterdichte temperatuur sensor aansluiten op Raspberry Pi
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#!/usr/bin/env python | |
# DS18B20 waterdichte temperatuur sensor aansluiten op Raspberry Pi | |
# https://raspberrytips.nl/ds18b20-raspberry-pi/ | |
import os | |
import glob | |
import time | |
os.system('modprobe w1-gpio') | |
os.system('modprobe w1-therm') | |
base_dir = '/sys/bus/w1/devices/' | |
device_folder = glob.glob(base_dir + '28*')[0] | |
device_file = device_folder + '/w1_slave' | |
def read_temp_raw(): | |
f = open(device_file, 'r') | |
lines = f.readlines() | |
f.close() | |
return lines | |
def read_temp(): | |
lines = read_temp_raw() | |
while lines[0].strip()[-3:] != 'YES': | |
time.sleep(0.2) | |
lines = read_temp_raw() | |
equals_pos = lines[1].find('t=') | |
if equals_pos != -1: | |
temp_string = lines[1][equals_pos+2:] | |
temp_c = float(temp_string) / 1000.0 | |
return temp_c | |
while True: | |
print(read_temp()) | |
time.sleep(1) |
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