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Updated the firmware to v1.1.3 and it worked like a charm

I know nothing about the 5DSR.  But I assume the Canon connect APP will work with it.  The APP is free for an iPhone.  The w-E! from B&H was $20

Using the EOS 7D Mark II, I had the same problem, talking to support they directed me to the link for firmware V1.1.3 when installed on the camera the remote works as expectedThe link is https://gdlp01.c-wss.com/gds/5/0400005265/01/eos7d2-v113-win.zi...