WidgetLCD Support

WidgetLCD.py

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+# The MIT License (MIT)
+#
+# Copyright (c) 2018 Kenny Hora
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+# Controls the LCD Widget in the Blynk App
+class WidgetLCD():
+    # Constructor
+    # Constructor for the Blynk LCD Widget
+    # Parameters:
+    #     blynk - Blynk object
+    #     vPin  - The Virtual pin the LCD is connected to
+    def __init__(self, blynk, vPin):
+        self.__blynk = blynk
+        self.__vPin = vPin
+
+    # clear()
+    # Clears the LCD widget
+    # Parameters: None
+    def clear(self):
+        self.__blynk.virtual_write(self.__vPin, 'clr')
+
+    # write(x, y, s)
+    # Prints a message to the LCD
+    # Parameters:
+    #     x - x-position of the lcd cursor | range [0, 15]
+    #     y - y-position of the lcd cursor | range [0, 1]
+    #     s - messages to print to the LCD
+    def write(self, x, y, s):
+        self.__blynk.virtual_write(self.__vPin, '\0'.join(map(str, ('p', x, y, s))))

examples/10_WidgetLCD.py

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+import BlynkLib
+import WidgetLCD
+import datetime
+
+# Blynk Auth Key - Get from Blynk App
+BLYNK_AUTH = 'Your Auth Key Here'
+
+# Blynk Object - allows virtual writing and reading
+blynk = BlynkLib.Blynk(BLYNK_AUTH)
+
+# LCD Widget
+# Attached to LCD widget on Blynk app on Virtual pin V0 and in advanced mode
+lcd = WidgetLCD.WidgetLCD(blynk, 0)
+
+# Button Widget
+# Attached to Button on Virtual pin V1
+# Prints date and time
+@blynk.VIRTUAL_WRITE(1)
+def printTime(value):
+    if value == '1':
+        # Clear LCD
+        lcd.clear()
+        #Print Date and time
+        lcd.write(0, 0, datetime.datetime.now().strftime("%m/%d/%Y"))
+        lcd.write(0, 1, datetime.datetime.now().strftime("%I:%M:%S %p"))
+
+if __name__ == '__main__':
+    # Run Blynk
+    blynk.run()