Bluetooth keypad not responding

 cnc-milling, evo, usage

1. Description of the problem

When you press a key on the keypad, nothing happens. Not even Homing.

2. Possible origins

Please note that your CNC machine needs a few seconds to establish the connection with the keypad at every start-up. It shouldn't take more than 10 seconds.

  1. The battery is low, the keypad needs charging.
    1. You haven't properly paired your keypad yet.
      1. The keypad lost its connection with the Raspberry.

        3. Solutions

        Solution 1: Use a micro-USB cable to plug the keypad into one of the machine's USB ports, or into a regular 5V phone charger.

        Solution 2: In order to pair the keypad with the Raspberry Pi correctly, follow this quick procedure (screenshots under the instructions):

        1. Turn on your machine and wait for the Raspberry Pi to start.
          1. Minimize PlanetCNC’s window to see the Desktop (screenshot on the right).
            1. Click the Bluetooth icon on the bottom right of the screen and choose “Add Device”.
              1. Press the Bluetooth pairing button located at the back of the interface unit.
                1. Your keypad should appear in the list of available devices.
                  1. Select your keypad and click “Pair”.

                    Solution 3: If the connection is lost, you might see the following error message when you try to pair your keypad:

                    In order to solve this issue, you should first remove the device from the Bluetooth list. Press the Bluetooth icon and choose "Remove Device":

                    You can now start again the pairing procedure described in solution 2.