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 hello():
connection = SerialManager(sleep_after_connect=2)
cols, rows = 16, 2
if I2C:
pins = [0x27, 2, 1, 0, 4, 5, 6, 7, 3, 0] # "ebay" version
lcd = Lcd_I2C(pins, [cols, rows], connection=connection)
lcd.setBacklight(0)
else:
pins = [7, 8, 9, 10, 11, 12]
lcd = Lcd(pins, [cols, rows], connection=connection)
lcd.setCursor(0, 0)
lcd.printString('hello')
#!/usr/bin/env python
import time
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)
