diff options
| -rwxr-xr-x[-rw-r--r--] | lcd.py | 2 | ||||
| -rw-r--r-- | temp.py | 29 |
2 files changed, 25 insertions, 6 deletions
@@ -18,7 +18,7 @@ lcd_rs = 25 lcd_en = 24 lcd_d4 = 23 lcd_d5 = 17 -lcd_d6 = 21 +lcd_d6 = 18 lcd_d7 = 22 @@ -1,4 +1,18 @@ +# -*- coding: utf-8 -*- +"""Python script to read temperature. + +I plug the sensor data into pin 4 on the raspberry pi which requires pin 4 to +be a gpio pin. If the modprobe commands don't results in the device showing up +in the bus folder then make sure the following line is in `/boot/config.txt` + +``` +dtoverlay=w1-gpio,gpiopin=4 +``` + +After rebooting the files should show up. +""" import glob +import os import time os.system('modprobe w1-gpio') @@ -8,14 +22,18 @@ 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 + """Read the raw temperature from the device.""" + f = open(device_file, 'r') + lines = f.readlines() + f.close() + return lines + def read_temp(): - lines = read_temp_raw() + """Read the temperature of the probe.""" + lines = read_temp_raw() while lines[0].strip()[-3:] != 'YES': time.sleep(0.2) lines = read_temp_raw() @@ -26,6 +44,7 @@ def read_temp(): temp_f = temp_c * 9.0 / 5.0 + 32.0 return temp_c, temp_f + while True: print(read_temp()) time.sleep(1) |