ESP8266 - 12F High consumption in led blink (with pictures)

Question

My esp is consuming 180mA with a led blink. The same consumption happens when I put it in WIFI_STA mode with the WiFi.mode(WIFI_STA); function.
What should I do to reduce consumption? Used AMS1117 CI as tension regulator.

My code:

void setup() {
  pinMode(2, OUTPUT); // pin number 2 is on board blue led
}

void loop() {
  digitalWrite(2, LOW); // blue led highlight with LOW level
  delay(100);
  digitalWrite(2, HIGH);
  delay(100);
}

Why all this consumption?

Answer 1

The SDK library of the ESP8266 remembers on flash memory the mode, SSID and password of the last WiFi network it connected. At start or by enabling STA mode it tries to connect to that network. The SDK library is always part of the compiled sketch for the esp8266.

The esp8266 WiFi library has some functions to control this:

• WiFi.setAutoConnect(false)
• WiFi.disconnect(true);
• WiFi.persistent(false)