Pitchkeeper Firmware Updater

Instructions:
1. Plug in your Pitchkeeper device via USB
2. Click "Connect Device" and select the COM port
3. Click "Update Firmware" to install the latest version
4. Wait for the update to complete (~30 seconds)
5. Unplug the device when the green LED stays solid

LED Indicators:
● Solid Green: Bootloader mode / Update complete
● Blinking Green: Firmware writing in progress
● Red: Error occurred