Raspberry Pi Workshop Kit Tutorials – 7 Temperature Sensor

Welcome to the Raspberry Pi Workshop Tutorials, brought to you by ModMyPi, BuyaPi.ca, and PiShop.us. In this series, we’ll demonstrate nine projects that can be made using the YouTube Workshop Kit for Raspberry Pi. These projects are a great way to familiarize yourself with the Pi’s input and output functions, as well as creating programs in Python that we’ll use to control the Pi’s hardware. Tutorial 7 - Temperature Sensor Circuit Diagram: http://www.modmypi.com/download/led_button_buzzer_temp_bb.png Tutorial 7 Download: http://www.modmypi.com/download/youtube_workshop_7_temperature.pdf View Tutorial Online: https://www.modmypi.com/blog/youtube-workshop-kit/gpio-and-python-79-temperature-sensor *** Code Used In This Tutorial *** #!/usr/bin/python import glob from time import sleep 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': 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 temp_f = temp_c * 9.0 / 5.0 + 32.0 return temp_c, temp_f while True: print(read_temp()) sleep(1)