How To - Doorbell Automation Hack

[drock1985]

Hey @petewill

Started working on the project this weekend. Didn't get the parts in this week due to the holiday. Did what I could though, and I have a schematic/drawing made up for the system. This is my first drawing in fritzing, so it's a little crude. I couldn't figure out how to add a 'T' section/junction in the wire, but it all lines up for reference anyways.

I'll start working on the Arduino code next.

[hek]

Why don't you send over the signal wirelessly between the two doorbells?

[drock1985]

Hi @hek

I'm not too sure I understand what you are referring to. If you are referring to the buttons themselves outside being wireless, I thought about it but wasn't too sure how long a battery would last and didn't want to be changing batteries. The way I plan to do this now, I can use the existing wiring for the doorbells that are already there, and splice into the power for the door bell to power the MySensors node.

Plus, both chimes are in the same spot, one relay sets off one set of the three contacts (Wtih a common ground I believe) and the other will chime the second.

[hek]

@drock1985

Ahh. nice. Thought you might have to run some new wires around the house.

[drock1985]

@hek lol, no. Just hooking up everything to the internet that I can.

[petewill]

@drock1985 Nice! Does your doorbell use DC so you can steal power from it? I wish mine did. That would have made things easier for me. Mine uses 16VAC... :(

[BulldogLowell]

@petewill

Convert it!!!

you have the power

you have the technology

diode bridge

[drock1985]

Hey @petewill

They vary. Some of the more expensive ones I've noticed use DC (ex play custom songs/tones), while the cheaper ones use AC.

I built the project around the idea the wife would want something more elaborate than a simple ding sound, but I was wrong lol. So I picked up one that she looked last night, and I believe it uses AC, so I will be making a slight change to my design.

I'll end up putting in one of these I figure, just haven't quite figured out what size smoothing capacitor I will need.

Also, I'm not 100% sure yet (at work, hard to do research) but I may be able to get away with a simple 5v regulator once the power is converted to DC, in lieu of a variable buck converter.

http://m.wikihow.com/Make-an-AC-DC-Converter

[petewill]

@BulldogLowell Haha, I just took the easy way out and ran a 5V line :)

@drock1985

I built the project around the idea the wife would want something more elaborate than a simple ding sound, but I was wrong lol.

Yeah, that's happened to me as well on other projects :)

[DrJeff]

@drock1985 said:

I'll end up putting in one of these I figure, just haven't quite figured out what size smoothing capacitor I will need.

Add a cap .1uf input side of the 5V regulator and a 47-220uf on the regulated 5V . High freq and a low freq ripple.

That should do the trick same thing I was planning on doing. I bought the Ring Doorbell but still want to be notified of the actual ring into HA.

[drock1985]

Hi @petewill

I finally got the parts in to do the project. I've been working on the code, but I seem to be running into an issue. I have the four devices show up in Domoticz, but I'm not getting any feedback from the sensor. Would you mind looking at the code for me please? This is the first program I have ever worked on, and not much of a programmer mentality yet.

/*
 * 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.
 *
 *******************************
 *
 * REVISION HISTORY
 * 
 * 2 Door Chime
 * Version 1.0 - ResentedPoet
 * DESCRIPTION
 * Original idea/concept by PeteWill. Modified code to add second actuator (relay)
 * door chimes with 2 doors. This will allow your home automation system to differentiate
 * between front and back door. As well, this allows current 2 door chimes to still have
 * their individual chimes. Pins 3 and 4 are used for door bell 1 and relay/chime 1 
 * respectively, and digital pins 5 and 6 for door bell 2 and relay/chime 2.
 */


#include <MySensor.h>
#include <SPI.h>
#include <Bounce2.h>

#define NODE_ID AUTO // or set a manual ID in place of AUTO

#define DOORBELL1_PIN  3      // Arduino Digital I/O pin number for the doorbell button 
#define RELAY1_PIN  4         // Arduino Digital I/O pin number for the relay 
#define DOORBELL1_CHILD_ID 0  //ID of the front doorbell
#define SWITCH1_CHILD_ID 1    // Id of the switch that will control front doorbell sound
#define RELAY1_ON 1
#define RELAY1_OFF 0
#define DOORBELL2_PIN  5      // Arduino Digital I/O pin number for the doorbell button 
#define RELAY2_PIN  6         // Arduino Digital I/O pin number for the relay 
#define DOORBELL2_CHILD_ID 2  //ID of the back doorbell
#define SWITCH2_CHILD_ID 3    // Id of the switch that will control back doorbell sound
#define RELAY2_ON 1
#define RELAY2_OFF 0

Bounce debouncer = Bounce();

MySensor gw;
MyMessage switchMsg1(SWITCH1_CHILD_ID, V_LIGHT);
MyMessage switchMsg2(SWITCH2_CHILD_ID, V_LIGHT);
MyMessage doorbellMsg1(DOORBELL1_CHILD_ID, V_TRIPPED);
MyMessage doorbellMsg2(DOORBELL2_CHILD_ID, V_TRIPPED);

unsigned int doorbellDelay = 1000; // interval at which to keep the doorbell button sensor triggered (milliseconds). This is used to stop people (kids) from pressing it too often
unsigned int ringTime = 700; //How long the doorbell relay is on (in milliseconds)
unsigned long doorbell1Millis;  //Used to keep track of the last front doorbell button press
unsigned long doorbell1Timer;  //Used to keep track of front doorbell ring time
unsigned long doorbell2Millis;  //Used to keep track of the last back doorbell button press
unsigned long doorbell2Timer;  //Used to keep track of back doorbell ring time
byte doorbell1PreviousVal;  //Used to keep track of front doorbell button pressed state
byte doorbell2PreviousVal;  //Used to keep track of back doorbell button pressed state
boolean ringDoorbell1;  //Used to initiate the ring front doorbell if statement
boolean doorbell1Sound; //Used to keep track if the front doorbell should sound or be silent.  Value recieved from doorbell on/off switch
boolean doorbell1Off = true;  //Used to keep track of front doorbell ring state
boolean ringDoorbell2;  //Used to initiate the ring front doorbell if statement
boolean doorbell2Sound; //Used to keep track if the front doorbell should sound or be silent.  Value recieved from doorbell on/off switch
boolean doorbell2Off = true;  //Used to keep track of front doorbell ring state

void setup()
{
  gw.begin(incomingMessage, NODE_ID);

  // Send the sketch version information to the gateway and Controller
  gw.sendSketchInfo("2 Doorbell Monitor", "1.0");

  // Setup the button and activate internal pull-up
  pinMode(DOORBELL1_PIN, INPUT_PULLUP);
  pinMode(DOORBELL2_PIN, INPUT_PULLUP);

  // After setting up the button, setup debouncer
  debouncer.attach(DOORBELL1_PIN);
  debouncer.attach(DOORBELL2_PIN);
  debouncer.interval(5);

  // Register all sensors to gw (they will be created as child devices)
  gw.present(SWITCH1_CHILD_ID, S_LIGHT);
  gw.present(DOORBELL1_CHILD_ID, S_MOTION);
  gw.present(SWITCH2_CHILD_ID, S_LIGHT);
  gw.present(DOORBELL2_CHILD_ID, S_MOTION);

  // Make sure relays are off when starting up
  digitalWrite(RELAY1_PIN, RELAY1_OFF);
  digitalWrite(RELAY2_PIN, RELAY2_OFF);
  // Then set relay pins in output mode
  pinMode(RELAY1_PIN, OUTPUT);
  pinMode(RELAY2_PIN, OUTPUT);

  // Set doorbellSound to last known state (using eeprom storage)
  doorbell1Sound = gw.loadState(SWITCH1_CHILD_ID);
  doorbell2Sound = gw.loadState(SWITCH2_CHILD_ID);
}

void loop()
{
  gw.process();
    unsigned long current1Millis = millis();
  //Check to see if front doorbell button was pushed.
  if (current1Millis - doorbell1Millis > doorbellDelay) //used to stop doorbell from being pressed too frequently
  {
    debouncer.update();
    // Read front doorbell button value
    byte doorbell1Detect = !debouncer.read();//read, then reverse the value so it will send correct trigger state to controller

    if (doorbell1Detect != doorbell1PreviousVal)
    {
      //Serial.print("doorbell1Detect Value: ");
      //Serial.println(doorbell1Detect);
      if (doorbell1Detect == 1)
      {
        ringDoorbell1 = true;
        doorbell1Timer = current1Millis;
      }
      doorbell1Millis = current1Millis;
      doorbell1PreviousVal = doorbell1Detect;
    }
  }

  if (ringDoorbell1)
  {
    if (doorbell1Sound)
    {
      if (doorbell1Off)
      {
        digitalWrite(RELAY1_PIN, RELAY1_ON);
        //Serial.println("Front Doorbell sounded.");
        doorbell1Off = false;
      }
      else
      {
        if (current1Millis - doorbell1Timer > ringTime)
        {
          ringDoorbell1 = false;
          digitalWrite(RELAY1_PIN, RELAY1_OFF);
          //Serial.println("Front Doorbell off.");
          doorbell1Off = true;
        }
      }
    }
  }

//Check to see if back doorbell button was pushed.
unsigned long current2Millis = millis();
    if (current2Millis - doorbell2Millis > doorbellDelay) //used to stop doorbell from being pressed too frequently
  {
    debouncer.update();
    // Read back doorbell button value
    byte doorbell2Detect = !debouncer.read();//read, then reverse the value so it will send correct trigger state to controller

    if (doorbell2Detect != doorbell2PreviousVal)
    {
      //Serial.print("doorbell2Detect Value: ");
      //Serial.println(doorbell2Detect);
      if (doorbell2Detect == 1)
      {
        ringDoorbell2 = true;
        doorbell2Timer = current2Millis;
      }
      doorbell2Millis = current2Millis;
      doorbell2PreviousVal = doorbell2Detect;
    }
  }

  if (ringDoorbell2)
  {
    if (doorbell2Sound)
    {
      if (doorbell2Off)
      {
        digitalWrite(RELAY2_PIN, RELAY2_ON);
        //Serial.println("Back Doorbell sounded.");
        doorbell2Off = false;
      }
      else
      {
        if (current2Millis - doorbell2Timer > ringTime)
        {
          ringDoorbell2 = false;
          digitalWrite(RELAY2_PIN, RELAY2_OFF);
          //Serial.println("Back Doorbell off.");
          doorbell2Off = true;
        }
      }
    }
  }
}

  void incomingMessage(const MyMessage & message) {
    // We only expect one type of message from controller. But we better check anyway.
    if (message.isAck()) {
      Serial.println("This is an ack from gateway");
    }

    if (message.type == V_LIGHT) {
      // Change relay state
      doorbell1Sound = message.getBool();
      // Store state in eeprom
      gw.saveState(SWITCH1_CHILD_ID, doorbell1Sound);

      // Write some debug info
      Serial.print("Incoming change for sensor:");
      Serial.print(message.sensor);
      Serial.print(", New status: ");
      Serial.println(message.getBool());
    }
    
  }```

[BulldogLowell]

Haha, I just took the easy way out and ran a 5V line

@petewill

that may be the easy way, but not as fun :(

[BulldogLowell]

@drock1985

I think your code is a little hard to get through, but you need two instances of the Bounce library if you want to manage two buttons:

  debouncer.attach(DOORBELL1_PIN);
  debouncer.attach(DOORBELL2_PIN);

do this instead:

//...
Bounce debouncePin1 = Bounce();
Bounce debouncePin2 = Bounce();
//...
void setup()
{
  //...
  debouncePin1.attach(DOORBELL1_PIN);
  debouncePin1.interval(5);
  debouncePin2.attach(DOORBELL2_PIN);
  debouncePin2.interval(5);
  //...
}

and update the state with:

debouncerPin1.update();

get it?

alternatively you could use an array:

Bounce debouncer[2] = Bounce();

it would make your code a lot easier, but you have to understand arrays and Classes or you will be a little lost.

[petewill]

@BulldogLowell

that may be the easy way, but not as fun :(

I know huh? It seems my opportunity for fun has been getting less and less these days :( I still need to finish the PhoneyTV project...

[timropp]

My mini RBoard just arrived yesterday to do this... too bad I won't have any time to mess with it till probably next weekend. I'll definitely share some pics and results once I get it installed!

[timropp]

I did take a look at my doorbell last night. I have a transformer down in the basement that's outputting 16VAC. Then the doorbell upstairs, with no convenient place to get power from. The wires from both the doorbell button and the transformer come to the doorbell "box" on the wall.

At first I was looking for a way to convert the 16VAC to 5VDC. Then as I was looking at the space in the doorbell to mount the board, I saw two more wires not connected to anything. They ran 4 conductor wire from the transformer to the bell! Sweet! So now I'll put a 5V source (probably phone charger to USB cable with the end cut off) in the basement, connect that to the other unused pair of wires, and have my power where I need it.

Is there any issue with running the 5V DC power and the 16VAC power alongside each other? It's not like either is carrying data, so I don't think there would be...

[rvendrame]

@timropp , If you are following the circuits posted above, the relays should provide complete isolation between 5VDC and 16VAC, so everything fine .

[drock1985]

Hi,

Just a quick question. I'm trying the original code for the doorbell, and I have it registering in Domoticz just great,. I have two lights, one to turn off the relay and the other, not sure of (thought it would turn on if doorbell was tripped). Anyways, did I miss something or did domoticz register it as the wrong item?

Thanks,

[petewill]

@drock1985 I have mine registered as a motion sensor. So when the button is pressed it shows tripped. It will only show tripped for one second though so maybe the Domoticz UI isn't updating fast enough?

[drock1985]

@petewill

Ah, that very well may be it. I'll investigate that end further. Thanks.