i checked my connection and founded the error...

the keypad is now working !

some pics :



tomorrow i start the Leds on the GPO and the serial connection !

Hello i'm making a custom keypad for my LK202-25..but i have some trouble...i made some test with my original MO keypad, and i founded this : up arrow key pushed => Pin 2 and 5 connected. down arrow => 2 and 4 left arrow => 1-4 right arrow => 3-4 Enter key => 2-6 F1 key => 1-5 F2 key => 1-6 so i con...

hello Henry

did you connect directly the led to the GPO or you used a capacitor and a diode like for a relay ?
thks