from nanpy import SerialManager
from nanpy.lcd import Lcd
if __name__ == '__main__':
connection = SerialManager(sleep_after_connect=2)
cols, rows = 16, 2
pins = [7, 8, 9, 10, 11, 12]
lcd = Lcd(pins, [cols, rows], connection=connection)
while True:
lcd.setCursor(0, 0);
for char in range(10):
lcd.printString(char)
time.sleep(0.5)
lcd.setCursor(16, 1)
lcd.autoscroll()
for char in range(10):
lcd.printString(char)
time.sleep(0.5)
lcd.noAutoscroll()
lcd.clear()
class NanpyCharDisplay(CharDisplay):
""" Nanpy Character Display
Display messages on a LCD connected to i2c
"""
""" Properties """
@property
def address(self):
""" Unique id or key """
return self.config.get('address', 0x27)
@property
def type(self):
""" Returns if using i2c or gpio for connection """
return self.config.get('type', 'i2c').lower()
""" Methods """
def init(self):
""" Connect to the Parent Device """
self._state = None
self._lcd = None
return True
def check_connection(self):
""" Check connection to node and lcd """
if self.node.connected:
if not self._lcd:
if self.type == 'i2c':
# PCF I2C Backpack
# [lcd_Addr, enable, Rw, Rs, d4, d5, d6, d7, backlighPin, pol]
pins = [0x27, 2, 1, 0, 4, 5, 6, 7, 3, 0]
# TODO: Add other backback support
self._lcd = Lcd_I2C(pins, [self.columns, self.rows],
connection=self.node.connection)
else:
# GPIO Connection
# [rs, enable, d4, d5, d6, d7]
pins = [
self.config.get('rs_pin', 7),
self.config.get('enable_pin', 8),
self.config.get('pin_1', 9),
self.config.get('pin_2', 10),
self.config.get('pin_3', 11),
self.config.get('pin_4', 12)
]
self._lcd = Lcd(pins, [self.columns, self.rows],
connection=connection)
else:
self._lcd = None
def update(self):
""" Control LCD display nanpy"""
if self.node.connected:
try:
self.check_connection()
super().update()
except (SerialManagerError, SocketManagerError, BrokenPipeError,
ConnectionResetError, OSError, socket.timeout) as e:
if self.node.connected:
Logger.log_formatted(
LOG_LEVEL["warning"],
f'{self.node.key} -> Broken Connection', 'Timeout',
'notice')
self.node.reset_connection()
self._lcd = None
return None
""" Actions """
def clear(self, data=None):
""" Clear the display screen """
self._lcd.clear()
Logger.log(LOG_LEVEL["debug"], 'Cleared the LCD Screen')
def show(self, data={}):
""" Show a message on the display """
if not isinstance(data, dict):
data = {'message': data}
self._lcd.setCursor(0, 0)
self._lcd.printString(data.get('message', ''))
def turn_on_backlight(self):
""" Turn the backlight on """
self._lcd.setBacklight(0)
def turn_off_backlight(self):
""" Turn the backlight on """
self._lcd.setBacklight(1)
from nanpy import SerialManager
from nanpy.lcd import Lcd
if __name__ == '__main__':
connection = SerialManager(sleep_after_connect=2)
cols, rows = 16, 2
pins = [7, 8, 9, 10, 11, 12]
lcd = Lcd(pins, [cols, rows], connection=connection)
while True:
lcd.setCursor(0, 0)
for char in range(10):
lcd.printString(char)
time.sleep(0.5)
lcd.setCursor(16, 1)
lcd.autoscroll()
for char in range(10):
lcd.printString(char)
time.sleep(0.5)
lcd.noAutoscroll()
lcd.clear()