I've been trying to get deep sleep working on ESP-12 module for days, with different NodeMCU firmwares, but still no luck, it gets stuck in hour or two.
I have GPIO 0 and GPIO 2 pulled by 4.7k resitors to VCC, gpio16 connected to RST, pulled also with 4.7k to VCC.
VCC is 3.2 - 4.0 V.
I've tried current master, dev096 branch, either download from release page or build by Marcel's cloud build service.
I wanted to try also build from March 31, but my ESPlorer was not able to upload script to it.
Can someone with working deep sleep, please, tell what latest firmware works for you? And how do you connect module?