OEM OOTB Code
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 I see this referenced in many threads here on the forum, but I do not see anything definitive. 
 Also there are no comment in the code that could clarify this...Is the example sketch "FactoryTest" the code that ships preloaded on a new device (mine is M5StickC-plus) ? (it'd be nice as a safety-net to fall back to should I mess up something while learning) 
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 @m5_tinker You will find the factory test firmware comes pre installed in M5Burner, M5stacks Firmware installation tool. 
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 Any idea if the "Factory Test" included in M5Burner is the same as the "FactoryTest" in the Arduino library example? 
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 @m5_tinker It should be, the M5Burner version is just precompiled ready to burn where as the Arduino version has to be compiled and burned. 

