class LCD_display(object):
bus = 1 # Note you need to change the bus number to 0 if running on a revision 1 Raspberry Pi.
address = 0x20 # I2C address of the MCP230xx chip.
gpio_count = 8 # Number of GPIOs exposed by the MCP230xx chip, should be 8 or 16 depending on chip.
# LCD 20x4
num_columns = 20
num_lines = 4
def __init__(self, init=True):
# Create MCP230xx GPIO adapter.
mcp = MCP230XX_GPIO(self.bus, self.address, self.gpio_count)
# Create LCD, passing in MCP GPIO adapter.
self.lcd = Adafruit_CharLCD(pin_rs=1,
pin_e=2,
pin_bl=7,
pins_db=[3, 4, 5, 6],
GPIO=mcp)
if init:
self.initialisation()
def initialisation(self):
self.lcd.clear()
self.lcd.begin(self.num_columns, self.num_lines)
self.lcd.backlightOn()
self.lcd.setCursor(0, 0)
#self.lcd.message(datetime.datetime.now().strftime(' %a %d %b - %H:%M'))
def line_message(self, row, text):
# set the position (row from 0 to 3)
self.lcd.setCursor(0, row)
# display the message
self.lcd.message(text)
def temperature(self, text):
#set the position
self.lcd.setCursor(0, 1)
#display the message and value
self.lcd.message("Temperature: %.2f" % text)
self.lcd.write4bits(0xDF, True) #display the degree symbol "°"
self.lcd.message("C")
def humidity(self, text):
#set the position
self.lcd.setCursor(0, 2)
#display the message and value
self.lcd.message("Humidity: %.2f%%RH" % text)
def pressure(self, text):
#set the position
self.lcd.setCursor(0, 3)
#display the message and value
self.lcd.message("Pressure: %.2fhPa" % text)
def date(self):
#set the position
self.lcd.setCursor(0, 0)
#display the message and value
self.lcd.message(datetime.datetime.now().strftime(' %a %d %b %H:%M'))
class LCD_display(object):
bus = 1 # Note you need to change the bus number to 0 if running on a revision 1 Raspberry Pi.
address = 0x20 # I2C address of the MCP230xx chip.
gpio_count = 8 # Number of GPIOs exposed by the MCP230xx chip, should be 8 or 16 depending on chip.
# LCD 20x4
num_columns = 20
num_lines = 4
def __init__(self, init=True):
# Create MCP230xx GPIO adapter.
mcp = MCP230XX_GPIO(self.bus, self.address, self.gpio_count)
# Create LCD, passing in MCP GPIO adapter.
self.lcd = Adafruit_CharLCD(pin_rs=1, pin_e=2, pin_bl=7, pins_db=[3,4,5,6], GPIO=mcp)
if init:
self.initialisation()
def initialisation(self):
self.lcd.clear()
self.lcd.begin(self.num_columns, self.num_lines)
self.lcd.backlightOn()
self.lcd.setCursor(0, 0)
#self.lcd.message(datetime.datetime.now().strftime(' %a %d %b - %H:%M'))
def line_message(self, row, text):
# set the position (row from 0 to 3)
self.lcd.setCursor(0, row)
# display the message
self.lcd.message(text)
def temperature(self, text):
#set the position
self.lcd.setCursor(0, 1)
#display the message and value
self.lcd.message("Temperature: %.2f" % text)
self.lcd.write4bits( 0xDF, True) #display the degree symbol "°"
self.lcd.message("C")
def humidity(self, text):
#set the position
self.lcd.setCursor(0, 2)
#display the message and value
self.lcd.message("Humidity: %.2f%%RH" % text)
def pressure(self, text):
#set the position
self.lcd.setCursor(0, 3)
#display the message and value
self.lcd.message("Pressure: %.2fhPa" % text)
def date(self):
#set the position
self.lcd.setCursor(0, 0)
#display the message and value
self.lcd.message(datetime.datetime.now().strftime(' %a %d %b %H:%M'))
#!/usr/bin/python
import time
from Adafruit_CharLCD import Adafruit_CharLCD
from time import sleep, strftime
from datetime import datetime
lcd = Adafruit_CharLCD()
lcd.clear()
lcd.backlightOn()
lcd.begin(16, 4)
lcd.setCursor(0, 0)
lcd.message(datetime.now().strftime('%b %d %H:%M\n'))
lcd.setCursor(0, 1)
lcd.message('hello')
