Hi, The wake from deepsleep is done based on pin level rather than the rising or falling edge of the pins. One way around this is to add a small circuit between the source of the signal and the pin that creates a small pulse instead of keeping the pin high. An example can be found here: http://www.esp8266.com/viewtopic.php?p=39550#p39550

@fred said in When is the Deep Sleep Shield required?: Ultra Low Power mode is available on the devices straight out of the box. It's probably also worth mentioning that it doesn't work...

The LoPy4 I can get it down to 0.076A on 5V (*) The FiPy is still dramatic ... even with the newest firmwares? (*) MicroPython v1.8.6-849-83e2f7f on 2018-03-19