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



  • 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) ๐Ÿ˜ž
    Since I read that it should be within ยตA-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



  • @RoBra81

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


  • Hero Member

    @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.


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