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How can I send Ctrl+; in iterm2 (emacs)?

There seems to be a solution here, here and here

These are close to what I want, but I am still unable to make it work.

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Adapting my answer to the third link and sending 0x1B 0x3B doesn't work? – Daniel Beck Mar 20 '14 at 18:54
Thanks for the response. I tried it, and realized 0x1B = ESC not control? (emacs sees it as M-; not C-;) – eugene Mar 21 '14 at 1:14
up vote 0 down vote accepted

The way I make these key combinations work is to go to the Keys section of the iTerm prefs and create a shortcut for ^; that sends some escape sequence, like ^[[aa (you can replace aa with anything, but be aware that some things are mapped to actual keys). Then in your .emacs, create a keyboard shortcut for what you want it to map to, like

(global-set-key (kbd "C-[ [ a a") 'the-function-you-want-to-map-to)
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