I have an ESP8266 which I wish to place in deep sleep until a reed switch senses a door being opened. The ESP8266 is woken from deep sleep by briefly raising the RESET pin high.
In my original design, I thought that raising the RESET pin would wake the device instantly. Instead raising the pin holds the device in a reset state until it goes low again. This means that the 8266 currently wakes after the door is opened and closed again.
I'm looking for a way to briefly trigger the RESET pin after the reed switch connection is broken with minimal additional hardware, and minimal power drain while in deep sleep. I can use either NC or NO Reed switches.