I recently did a homelink / compass mirror retrofit to my E83. The lights on my mirror acts just like Jim H, always a slow blink. My mirror has the low profile led instead of the standard red clown nose, along with yellow led's along the lower left bottom edge.
I've watched a lot of the online video's, and my lights never seem to match the ones in the videos.
I have a Chamberlain opener, with a date code of 2016. Were able to program the mirror in the E30 without issue. I've tried several different remotes, as well as the learn button. I have two remotes that are model 953ESTD 02/16, one that is 953EV 1/18.
Been thinking about getting the Chamberlain Compatibility Bridge, I found it on Amazon for 25.
https://www.chamberlain.com/homelink...ibility-bridge