ESP8266 Community Forum

Do pins on the ESP8266 consume current when unused (floating) ?

No. Not unless you are grounding them. And even then it should not add up to 5 mA.

The USB to serial converter is probably causing the most current consumption. But the data sheet says that when it is sleep mode it should draw 200uA maximum.

The 3.3 volt regulator has a very low current spec so I doubt it is the major source of current. But the manufacture only lists a spec when it has a 1 volt differential between input and output. I know that some voltage regulators will draw more current when the difference between input and output becomes less. I have had a problem with that in the past.

I have a remote device http://www.esp8266.com/viewtopic.php?f=11&t=15929 I made that uses the ESP-07 module, an oled display, and an orientation sensor. A 350mAH lithium battery for power. And two 250mA voltage regulators in parallel (me bad) for the 3.3 volts. I don't use deep sleep. I use the chip enable pin of the ESP8266 to reduce the power. I don't need it to automatically wake, and I don't use the RTC memory. I have a current drain of 0.35mA, and I'm disappointed in that. I was hoping for 1/3 of that. I have not looked at where the current is going yet.