Make a clock on Raspberry Pi with Python and 3.5" display

This program reads temp and humidity fram a DHT11, connected to GPIO26. The RPi is also connected to the network with WiFi.

Inpired from this link: AdaFruit DHT11

To get the source code:

git clone https://github.com/adafruit/Adafruit_Python_DHT.git
cd Adafruit_Python_DHT

To install the library:

sudo apt-get update
sudo apt-get install build-essential python-dev python-openssl

and:

sudo python setup.py install

Pictures

This is what the 3.5" screen looks like

Clock

The Perfboard is shaped so it fits in the USB port of the Pi.

DHT11

The code

from Tkinter import *
import Adafruit_DHT
import datetime

''' Function to update time, date, temp and hum'''
def tick():
    now = datetime.datetime.now()

    h, t = Adafruit_DHT.read_retry(11, 26)
    temp_string = ('T:{0:0.0f}'.format(t))
    temperature.config(text=temp_string)

    hum_string = (' - H:{0:0.0f}'.format(h))
    humidity.config(text=hum_string)

    time_string = now.strftime("%H:%M")
    clock.config(text=time_string)
    clock.after(2000,tick)

    date_string = now.strftime("%a %d %b %y")
    date.config(text=date_string)

''' This function quits the program'''
def quit():
    global window
    window.quit()

''' Make us some workspace'''
window = Tk()
window.overrideredirect(True)
window.geometry("480x320")
window.configure(background='white')

''' Label that shows the time'''
clock = Label(window, font=("serif", 100, "bold"), bg="white")
clock.pack()

''' Label that shows the date'''
date = Label(window, font=("serif", 20, "bold"), bg="white")
date.pack()

''' Label that shows the temperature'''
temperature = Label(window, font=("serif", 70, "bold"), bg="white")
temperature.pack(side = LEFT)

''' Label that shows the humidity'''
humidity = Label(window, font=("serif", 70, "bold"), bg="white")
humidity.pack(side = LEFT)

''' Quit button in the top left corner'''
quit_btn = Button(window, text="Q", activebackground='red', background='white', command=quit)
quit_btn.place(x=0, y=0)

tick()

window.mainloop()

nerdegutta