hello,
does anyone know of any wyze OG compatible external microphones, or ways to upgrade the existing microphone?
Welcome to the Wyze User Community Forum @lcdlabuw! 
None of the Wyze Cams have external mic capabilities as none have any jack \ plug for one.
I am sure there are users somewhere who have modified the internal workings of the cam to add a different mic, but doing so immediately voids the warranty. The mic power requirements would be a significant limiting factor. A YouTube search would probably return some results for other Wyze Cams which are conceptually the same as the OG.
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