I guess the obvious thing might be to use the Bluetooth HID functionality to emulate a keyboard and send keypresses for a gesture? This is already done in https://banglejs.com/apps/#hidkbd as well.
I'd have thought there would be a way to do something with IFTTT when a key is pressed on the phone?
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I guess the obvious thing might be to use the Bluetooth HID functionality to emulate a keyboard and send keypresses for a gesture? This is already done in https://banglejs.com/apps/#hidkbd as well.
I'd have thought there would be a way to do something with IFTTT when a key is pressed on the phone?
Otherwise if you have an old phone that you can just leave around then you could use this code: http://www.espruino.com/BLE+IFTTT
There are even other Bluetooth options now as well (involving scanning) that don't even require an active connection