Keypad row not fucntional

Projects General Guidance
1

My 4x4 keypad's 2nd row is not functional.

After connecting it to the Serial Monitor, and printing the keys when pressed, the keys "4, 5, 6, B" fail to show up.

After using a test probe connected to an LED, I noticed the R2 pin on the keypad was acting up, making the LED shine far brighter than any other pin.

This pin is connected to Digital 1 pin on the arduino, and the code is according to the pin placement on the arduino, where every other key on the keypad works.

When placing the test probe in the Digital 1 pin on the arduino, the LED shone significantly brighter than any other pin also being used for the keypad.

Can anyone help fix my issue?

Thanks.

2

Most probably pin 1 is already in use for some other purpose.

3

Did you not read the instructions that tell you not to connect any of your project pieces to pin 0 (receive) or pin 1 (transmit) on the Arduino? :roll_eyes:

Use another pin, and remember that in future! :astonished:

4

Hi,
Can you post your code and schematic of your project please?

Thanks.. Tom.. :slight_smile:

5

Paul__B:
Did you not read the instructions that tell you not to connect any of your project pieces to pin 0 (receive) or pin 1 (transmit) on the Arduino? :roll_eyes:

Use another pin, and remember that in future! :astonished:

Depends on the Arduino model :wink: Which OP conveniently forgot to mention :frowning:

6

Well, if he ever returns to the scene of the crime, we will figure it out, but given the description, the use of pin 1 and the serial monitor, all bets are on it being a "UNO" of some variety. :grinning: