SOLVED: open your boards.txt file and add the code below... (Windows 10 64 bit example) C:\Users\YOURUSERNAME\AppData\Local\Arduino15\packages\m5stack\hardware\esp32\2.0.5 (you may need to make hidden folders visible in the top menu section under the view tab) Open the boards.txt file Scroll down to the m5stick-c-plus section of code listed. At the very bottom of this section add the lines: Notice the way this is listed for other boards like the stick-c and do the same. You can now use the stick-c plus board listed in the Arduino IDE! You could also just use the stick-c board listed but I had errors in third-party programs.