Always getting HIGH reading from PIR on ESP8266-12e pin D7
I only get HIGH from life. ;) but the PIR goes high with IR activity and needs a pull-down resistor for say 50uA  or 3.3V/50u = 67k nearest value to indicate absence.
If you were powering from 5V your ESP might latchup and might get very hot.  You better check that 5V is not being used.