void setup ()
{
Lcd_1.begin(16,2);
}
void loop()
{
Lcd_1.clear();
Lcd_1.setCursor (4,0);
Lcd_1.setBacklight(1);
Lcd_1.print("sensor de ar comprimido");
Lcd_1.setCursor(3,1);
Lcd_1.setBacklight(1);
Lcd_1.print("presao 19/2");
delay (200);
}
esta dando erro no lcd_1.clear();
'Lcd_1' was not declared in this scope