Preparations

This guide is intended for Pabile Keyboards featuring Pro Micro ATMEGA32U4 microcontrollers. Please note that flashing new firmware will erase all existing configurations on the controller, so ensure you have a backup or a copy of your settings before proceeding.

The instructions provided are tailored for Microsoft Windows. While non-Windows users can use this guide as a reference, be aware that the process may vary for other operating systems.

Checklist

1. Software Required: You will need QMK Toolbox to flash the firmware to your keypad. Although there are other methods for flashing firmware, this guide will focus on using QMK Toolbox.

2. Firmware File: Each keypad requires a specific firmware file. These files are provided in a .hex format and can be found here. Download the firmware that matches your keypad model.

3. Reset Button: The reset button is located at the bottom of the keypad. To press the reset button, use a small blunt tool such as a toothpick, as it is accessible through a small hole. Some keypads may have been released without a physical reset button—use tweezers for these models.

Entering Bootloader State (Reset)

To update the firmware, your keypad/controller needs to enter the bootloader state, where it can accept new firmware. Follow these methods to enter bootloader mode:

For Keypads Running VIA/VIAL Firmware:

1. 1. Unplug the USB cable from the keypad.

   2. Press and hold the top-left key (e.g., "Q" for models like P40, P42). For a visual demonstration, see this video.

   3. Reconnect the USB cable to the keypad and your PC while continuing to hold the key.

   4. Release the key once the computer detects the device (indicated by a "device plugged in" sound).

For New or Unresponsive Pro Micro Controllers: Press the reset button on the keypad directly.

If the Reset Button Method Fails: Double-tap the reset button quickly (two rapid presses).

Important: The bootloader state is active for only 8 seconds. Ensure you flash the firmware within this window, or the keypad will revert to normal operation.

Locating Reset Buttons

The reset button is usually located beneath the bottom casing of the keypads, accessible through a small hole. This button is designed to connect (ground) the RST and GND pins on the controller. When these pins are grounded, the controller will enter bootloader mode, allowing it to accept new firmware. 

How to know if keypad is in bootloader sate?

Bootloader state will show as new COM port in Windows' Device Manager. QMK Toolbox automatically detects this COM number. 

Flashing firmware

Video posted below shows how to flash a P9v2 macropad by press-holding the top left most key (R0C0).

Test

Test keypad using Vial's matrix tester or a notepad. If all keys register, you may proceed to configure your keypads. Backup VIAL layouts (default configuration) can be found here - select the layout applicable to the keypad and load it using Vial configurator.

Troubleshooting

Fresh Pro Micro

Older Pro Micro controllers with micro USB ports are generally easier to flash, with a straightforward bootloader entry process. However, newer versions featuring USB Type-C ports may be more challenging to reset. If you encounter difficulties, try resetting the controller twice quickly; this method often resolves the issue. [Source]

Flashing with AVRDUDESS

There were instances that flashing with QMK Toolbox fails. Using AVERDUDESS to flash firmware fixed this issue.  

USB Cable

Ensure you are using USB data cables for flashing firmware. If the keypad functions correctly with the cable connected, it is suitable for firmware updates.

Date updated: 26JAN23 rev-14AUG24