dniklaus / arduino-display-lcdkeypad Goto Github PK
View Code? Open in Web Editor NEWArduino LCD Keypad Shield driver.
Arduino LCD Keypad Shield driver.
The LiquidTWI2 driver is not loaded if the application doesn't initialize the I2C system with
Wire.begin();
before the LcdKeypad object gets created. With this missing initialization step, the HW presence check fails and the LiquidCrystal object will be created instead.
Just stumbled upon the following warning to users of some vendors LCD keypad shields in the Arduino Forum / Display section.
WARNING! This component is potentially damaging your Arduino!
DO NOT USE THIS COMPONENT AS LONG AS THIS ISSUE IS NOT FIXED!
Simple SW fix:
In the method void LcdKeypad::setBackLightControl()
do the following:
INPUT
and write a low value in order to disable the internal pull-up resistorOUTPUT
and write a low valueWill this work on a 16x2 lcd keypad shield?
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