Link to firmware: http://firmware.mpselectmini.com
Updating the firmware is not supported by Monoprice.
Note: If you have trouble updating, please format microSD card or use another microSD card and try again. Try a microSD card that is 4GB or less formatted with FAT. The printer can be picky at which cards it will update from so try a few cards.
This method takes a little more work but has a nearly 100% chance of working the first time.
(Same instructions as recovery mode)
Please use command M115 to check version and model. If model incorrect, please type “M115 S1” to correct.
YouTube link: https://youtu.be/zAj9wqvPNfA - Updating motion controller firmware - A quick video showing the update process.