TempMonitor/char_lcd.py at master · eakoning/TempMonitor · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
#!/usr/bin/python
# Example using a character LCD connected to a Raspberry Pi or BeagleBone Black.
import time
import Adafruit_CharLCD as LCD
import LCDWriter

# Raspberry Pi pin configuration:
lcd_rs = 25  # Note this might need to be changed to 21 for older revision Pi's.
lcd_en = 24
lcd_d4 = 23
lcd_d5 = 17
lcd_d6 = 21
lcd_d7 = 22
lcd_backlight = 4

# Define LCD column and row size for 16x2 LCD.
lcd_columns = 16
lcd_rows    = 2

# Initialize the LCD using the pins above.
lcd = LCD.Adafruit_CharLCD(lcd_rs, lcd_en, lcd_d4, lcd_d5, lcd_d6, lcd_d7, lcd_columns, lcd_rows, lcd_backlight)

def demo():
    # Print a two line message
    lcd.message('Hello\nworld!')

    # Wait 5 seconds
    time.sleep(5.0)

    # Demo showing the cursor.
    lcd.clear()
    lcd.show_cursor(True)
    lcd.message('Show cursor')

    time.sleep(5.0)

    # Demo showing the blinking cursor.
    lcd.clear()
    lcd.blink(True)
    lcd.message('Blink cursor')

    time.sleep(5.0)

    # Stop blinking and showing cursor.
    lcd.show_cursor(False)
    lcd.blink(False)

    # Demo scrolling message right/left.
    lcd.clear()
    message = 'Scroll'
    lcd.message(message)
    for i in range(lcd_columns-len(message)):
        time.sleep(0.5)
        lcd.move_right()
    for i in range(lcd_columns-len(message)):
        time.sleep(0.5)
        lcd.move_left()

    # Demo turning backlight off and on.
    lcd.clear()
    lcd.message('Flash backlight\nin 5 seconds...')
    time.sleep(5.0)
    # Turn backlight off.
    lcd.set_backlight(0)
    time.sleep(2.0)
    # Change message.
    lcd.clear()
    lcd.message('Goodbye!')
    # Turn backlight on.
    lcd.set_backlight(1)

lcd.clear()

lcdWriter = LCDWriter()

while True:
    text = input("Voer wat in")
    if not text:
        lcdWriter.writeMessage()
        time.sleep(0.2)