HOW TO CHECK MARLIN FIRMWARE VERSION USING PRONTERFACE

This is a quick one

Open Pronterface

Connect the motherboard to the computer using USB cable

Make sure any jumpers for USB are enabled on the motherboard (instead of power supply)

In Pronterface, click Connect

You will see the following message

Connecting…
Printer is now online.

Next type in M115 and press Send

Your firmware will now be listed…

SENDING:M115
FIRMWARE_NAME:Marlin 2.0.5.3 (GitHub) SOURCE_CODE_URL:https://github.com/MarlinFirmware/Marlin PROTOCOL_VERSION:1.0