Sleep() doesn't "power down" the controller

[RoBra81]

Hello,

I'm creating my first sensor which shall be a sensor monitoring multiple window sash. For that I want't to configure multiple pins as interrupt and set the arduino sleeping until one sash changes its state. Interrupts are working fine but since I'd like to power the sensor using batteries I measured the current and stated that even when thinking the sensor shall sleep it needs about 2mA (cut off power LED)
Since I read that it should be within µA-area I'm asking what I'm doing wrong?

Here my sketch:

/**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * DESCRIPTION
 *
 * Interrupt driven binary switch example with dual interrupts
 * Author: Patrick 'Anticimex' Fallberg
 * Connect one button or door/window reed switch between 
 * digitial I/O pin 3 (BUTTON_PIN below) and GND and the other
 * one in similar fashion on digital I/O pin 2.
 * This example is designed to fit Arduino Nano/Pro Mini
 * 
 */
#include <MySensor.h>
#include <SPI.h>

#include <EnableInterrupt.h>

#define SKETCH_NAME "Multiple Window Sensor"
#define SKETCH_MAJOR_VER "1"
#define SKETCH_MINOR_VER "0"

#define FIRST_WINDOW_ID 1
#define SECOND_WINDOW_ID 2
#define THIRD_WINDOW_ID 3
#define FORTH_WINDOW_ID 4

#define FIRST_WINDOW_PIN 4   // Arduino Digital I/O pin for button/reed switch
#define SECOND_WINDOW_PIN 5 // Arduino Digital I/O pin for button/reed switch
#define THIRD_WINDOW_PIN 6   // Arduino Digital I/O pin for button/reed switch
#define FORTH_WINDOW_PIN 7 // Arduino Digital I/O pin for button/reed switch

MySensor sensor_node;

// Change to V_LIGHT if you use S_LIGHT in presentation below
MyMessage first_window_msg(FIRST_WINDOW_ID, V_TRIPPED);
MyMessage second_window_msg(SECOND_WINDOW_ID, V_TRIPPED);
MyMessage third_window_msg(THIRD_WINDOW_ID, V_TRIPPED);
MyMessage forth_window_msg(FORTH_WINDOW_ID, V_TRIPPED);

void interruptFunctionFirstWindow() {
  sensor_node.sleep(5);
  sensor_node.send(first_window_msg.set(digitalRead(FIRST_WINDOW_PIN)));
}

void interruptFunctionSecondWindow() {
  sensor_node.sleep(5);
  sensor_node.send(second_window_msg.set(digitalRead(SECOND_WINDOW_PIN)));
}

void interruptFunctionThirdWindow() {
  sensor_node.sleep(5);
  sensor_node.send(third_window_msg.set(digitalRead(THIRD_WINDOW_PIN)));
}

void interruptFunctionForthWindow() {
  sensor_node.sleep(5);
  sensor_node.send(forth_window_msg.set(digitalRead(FORTH_WINDOW_PIN)));
}

void setup()  
{  
  sensor_node.begin();

  // Setup the buttons
  pinMode(FIRST_WINDOW_PIN, INPUT_PULLUP);
  pinMode(SECOND_WINDOW_PIN, INPUT_PULLUP);
  pinMode(THIRD_WINDOW_PIN, INPUT_PULLUP);
  pinMode(FORTH_WINDOW_PIN, INPUT_PULLUP);

  // Send the sketch version information to the gateway and Controller
  sensor_node.sendSketchInfo(SKETCH_NAME, SKETCH_MAJOR_VER"."SKETCH_MINOR_VER);

  // Register binary input sensor to sensor_node (they will be created as child devices)
  // You can use S_DOOR, S_MOTION or S_LIGHT here depending on your usage. 
  // If S_LIGHT is used, remember to update variable type you send in. See "msg" above.
  sensor_node.present(FIRST_WINDOW_ID, S_DOOR);  
  sensor_node.present(SECOND_WINDOW_ID, S_DOOR);  
  sensor_node.present(THIRD_WINDOW_ID, S_DOOR);  
  sensor_node.present(FORTH_WINDOW_ID, S_DOOR);  

  enableInterrupt(FIRST_WINDOW_PIN, interruptFunctionFirstWindow, CHANGE);
  enableInterrupt(SECOND_WINDOW_PIN, interruptFunctionSecondWindow, CHANGE);
  enableInterrupt(THIRD_WINDOW_PIN, interruptFunctionFirstWindow, CHANGE);
  enableInterrupt(FORTH_WINDOW_PIN, interruptFunctionSecondWindow, CHANGE);
}

// Loop will iterate on changes on the BUTTON_PINs
void loop() 
{
  sensor_node.sleep(0, CHANGE, 1, CHANGE, 0);
} 

Could anybody help me finding the problem?

Thanks in advance
Ronny

[Dwalt]

@RoBra81

Which Arduino model are you using? Pro-mini? You mentioned cutting the LED, did you also remove the power regulator?

[AWI]

@RoBra81 When (one of) your contacts is closed there will be a current flowing through the (internal) pull-up's of the Arduino. This is around 0.25 mA per active switch! depending on the type of Arduino and supply voltage. AVR has 20k-50k pull-up resistors.