Automated garage door

[dbemowsk]

So I have not started creating the sketch yet, but I have outlined the logic and the comments that will go at the top of the sketch. I am looking for feedback on the features/logic of the sketch before I start writing the code.

/*
MyGarageDoor for MySensors

Arduino garage door control

June 16,2016

This will allow the MySensors gateway to monitor and control your garage door opener.  This will 
monitor the internal upper and lower limit switches of the door opener to determine door position 
for status as well as have a relay switched output that can control either the momentary contact 
switch connected to the door opener or wired directly to the switch contacts of a door opener 
remote to activate the door.

This sketch features the following:

* Allows you to monitor the door position and return it's status based on the following:
    1 - When either the upper or lower door limit switches are reached, the door is said to be 
        either fully open or fully closed. When a limit switch is triggered, the lastLimit and 
        currentState variables are set to either OPEN or CLOSED based on the limit switch that was 
        triggered.
    2 - If the upper and lower limit inputs both read high, then the door is said to be in motion.
        The door's direction of motion is determined from the lastLimit variable.  If the lastLimit
        of the door is OPEN, then the currentState variable should be set to CLOSING.  If the 
        lastLimit of the door is CLOSED, then the currentState variable should be set to OPENING.
* Checks for door obstructions and throws an error by checking the currentState and lastLimit 
  variables when the upper limit is reached.  If the upper limit is triggered and the currentState 
  is set to CLOSING and thelastLimit is set to OPEN, this should indicate that the door reversed 
  when closing and returned to the fully opened position.  The error state should only appear if 
  BOTH the lastLimit and currentState conditions match.  If lastLimit is OPEN and the lastState is 
  OPENING, this would indicate that the door was manually reversed.  This chech should only be 
  needed when the upper limit is reached.
* Allows you to toggle the opener to either open or close the door.  When the door is toggled, the 
  currentState should be checked and if the state is either OPENING or CLOSING, the currentState 
  should invert telling that the door has changed direction.  This is done to prevent an error if 
  the door is reversed manually when closing.

PARTS LIST:
* Arduino pro mini
* nRF24L01 radio module
* AMS1117 3.3v regulator
* 0.1uf capacitor
* 10uf electrolytic capacitor
* 4.7uf electrolytic capacitor (for radio module)
* 5v reed relay
* 2N3904 transistor for relay
* 1k resistor
* Two small signal diodes for incoming signals from door opener

Wiring from garage door opener
Yellow = Uper limit
Brown = Lower limit
Gray = Signal ground
*/

Also if someone could point me to a good sketch to start building from, that would be appreciated.

[dbemowsk]

OK, so here is my first attempt at a sketch. I have not tried to compile this yet because there are probably errors, and there is something missing that I am stuck on. The main thing is I am wondering how to return the door status with a request from the gateway. And if someone could look at the code and point out some of the errors that I am sure are there it would be appreciated.

/*
MyGarageDoor for MySensors

Arduino garage door control

June 16,2016

This will allow the MySensors gateway to monitor and control your garage door opener.  This will 
monitor the internal upper and lower limit switches of the door opener to determine door position 
for status as well as have a relay switched output that can control either the momentary contact 
switch connected to the door opener or wired directly to the switch contacts of a door opener 
remote to activate the door.

This sketch features the following:

* Allows you to monitor the door position and return it's status based on the following:
    1 - When either the upper or lower door limit switches are reached, the door is said to be 
        either fully open or fully closed. When a limit switch is triggered, the lastLimit and 
        currentState variables are set to either OPEN or CLOSED based on the limit switch that was 
        triggered.
    2 - If the upper and lower limit inputs both read high, then the door is said to be in motion.
        The door's direction of motion is determined from the lastLimit variable.  If the lastLimit
        of the door is OPEN, then the currentState variable should be set to CLOSING.  If the 
        lastLimit of the door is CLOSED, then the currentState variable should be set to OPENING.
* Checks for door obstructions and throws an error by checking the currentState and lastLimit 
  variables when the upper limit is reached.  If the upper limit is triggered and the currentState 
  is set to CLOSING and the lastLimit is set to OPEN, this should indicate that the door reversed 
  when closing and returned to the fully opened position.  The error state should only appear if 
  BOTH the lastLimit and currentState conditions match.  If lastLimit is OPEN and the lastState is 
  OPENING, this would indicate that the door was manually reversed.  This chech should only be 
  needed when the upper limit is reached.
* Allows you to toggle the opener to either open or close the door.  When the door is toggled, the 
  currentState should be checked and if the state is either OPENING or CLOSING, the currentState 
  should invert telling that the door has changed direction.  This is done to prevent an error if 
  the door is reversed manually when closing.

PARTS LIST:
* Arduino pro mini
* nRF24L01 radio module
* AMS1117 3.3v regulator
* 0.1uf capacitor
* 10uf electrolytic capacitor
* 4.7uf electrolytic capacitor (for radio module)
* 5v reed relay
* 2N3904 transistor for relay
* 1k resistor
* Two small signal diodes for incoming signals from door opener

Wiring from garage door opener
Yellow = Upper limit D7
Brown = Lower limit D8
Gray = Signal ground

Relay D5
*/

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

#define SKETCH_NAME "MyGarageDoor"
#define SKETCH_VERSION "1.0"

#define UPPER_LIMIT_SENSOR 7  //Pin used for input from the garage door upper limit sensor
#define LOWER_LIMIT_SENSOR 8  //Pin used for input from the garage door lower limit sensor
#define DOOR_ACTUATOR_RELAY 5 //Pin used to toggle the door actuator relay
#define RELAY_ON 1  // GPIO value to write to turn on attached relay
#define RELAY_OFF 0 // GPIO value to write to turn off attached relay

#define TOGGLE_INTERVAL 2000 //Tells how many milliseconds the relay will be held closed

#define CLOSED = 0
#define OPEN = 1
#define CLOSING = 2
#define OPENING = 3

const char *lastLimit[] = { "Closed", "Open" };
const char *currentState[] = { "Closed", "Open", "Closing", "Opening" };

int cState;     //Current state of the door
int lState;     //Last state of the door
int lLimit = 0; //The last full limit position of the door (open or closed)

boolean obstruction = false; //Used for the error condition when the door is unexpectedly reversed

SimpleTimer timer; //The timer object used for toggling the door opener

MySensor gw;

/**
 * setup - Initialize the garage door sensor
 */
void setup()  { 
  pinMode(UPPER_LIMIT_SENSOR, INPUT);
  pinMode(LOWER_LIMIT_SENSOR, INPUT);
  pinMode(DOOR_ACTUATOR_RELAY, OUTPUT);

  Serial.println( SKETCH_NAME ); 
  gw.begin( incomingMessage, AUTO );
  
  gw.sendSketchInfo( SKETCH_NAME, SKETCH_VERSION );
  
  // Register the garage door sensor with the gateway
  gw.present( getNodeId(), S_LIGHT );

  //Get the current door state
  getState();
}


void loop() {
  // Alway process incoming messages whenever possible
  gw.process();

  //For every cycle while the door is opening or closing, we'll get the state of the door to see 
  //when the door has reached it's upper or lower limit.  Once the door has reached it's fully
  //open or fully closed position, we'll set the last limit to the current state
  if ( (cState == OPENING) || (cState == CLOSING) ) {
    getState();
    if ( (cState == OPEN) || (cState == CLOSED) ) {
      setLastLimit( cState );
    }
  }
}

void incomingMessage( const MyMessage &message ) {
  // We only expect one type of message from controller. But we better check anyway.
  if ( (message.type==V_STATUS) && (message.getBool() == RELAY_ON) ) {
     //Toggle the door opener
     toggleDoor();
  }
}

/**
 *toggleDoor - Used to activate the garage door opener
 */
void toggleDoor() {
  digitalWrite( DOOR_ACTUATOR_RELAY, RELAY_ON );
  timer.setTimeout( TOGGLE_INTERVAL, relayOff );
}

/**
 *relayOff - Used to turn off the door opener relay after the TOGGLE_INTERVAL
 */
void relayOff() {
  digitalWrite( DOOR_ACTUATOR_RELAY, RELAY_OFF );
}

/**
 *getState - Used to get the current state of the garage door.  This will set the cState variable
             to either OPEN, CLOSED, OPENING and CLOSING
 */
void getState() {
  int upper = digitalRead( UPPER_LIMIT_SENSOR ); //read the upper sensor
  int lower = digitalRead( LOWER_LIMIT_SENSOR ); //read the lower sensor

  //Save the last state of the door for later tests
  lState = cState;

  //Check if the door is open
  if ((upper == HIGH) && (lower == LOW)) {
    //Set the current state to open
    cState = OPEN;
  //Check if the door is closed
  } else if ((upper == LOW) && (lower == HIGH)) {
    //Set the current state to closed
    cState = CLOSED;
  //Check if the door is in motion
  } else if ((upper == HIGH) && (lower == HIGH)) {
    //If in motion and the last full position of the door was open
    if (lLimit == OPEN) {
      //Set the current state to closing
      cState = CLOSING;
    //If in motion and the last full position of the door was closed
    } else {
      //Set the current state to opening
      cState = OPENING;
    }
  }
}

void setLastLimit( int limit ) {
  //Here is where we check for our error condition
  if ( (lLimit == OPEN) && (limit == OPEN) && (lState == CLOSING) ) {
    //An obstruction has reversed the door.  No need to set the last limit because it already equals
    //the limit we are trying to set it to
    obstruction = true;
  //If we made it here and the last limit does not equal the limit we are setting then change it.  If
  //the last limit is equal to the limit we are setting then the last state was something other than 
  //closing, so we don't need to do anything.
  } else if ( lLimit != limit ) {
    //Everything okay, set the last limit
    lLimit = limit;
  }
}

[martinhjelmare]

@dbemowsk

If state is binary ie open or closed, you should add a Message variable in the sketch scope, before setup, of type V_STATUS. Then handle a request/message of type V_STATUS in the incoming message function and send a message with the current state. Look at the relay example sketch.

The request message will lack a payload.

Since you have four internal states in the sketch, I would convert them to either open or closed when reporting to the gateway. I would think the gateway is only interested in that binary state. The device should handle logic regarding the state for opening and closing.

When you present the sensor, you probably don't always want to use the same id for the child as for the node. Now you're using getNodeId to assign child id. I would put a static integer value for the child id. You can define this before setup.

I haven't looked in detail at all the state logic for the door. I think you know best how that should behave.

[dbemowsk]

@martinhjelmare Bear with me on this because I am very new to this.

About the child ID, thanks for that tip. I wasn't realizing that there were the two different IDs (node ID and child ID). It makes sense though. If you have more than one sensor on a node, you would need to be able to tell which sensor on the node you are working with. I am assuming that most people just go with a starting child node of 0 and increment from there if they add more sensors?

I am curious why I would not want to send one of the 4 states? Why would I want to convert to just a binary OPEN or CLOSED? One other thing I would like to report back that may affect this is if you notice, I have an obstruction variable that tells whether or not something caused the door to reverse when closing. If I just assumed that CLOSING would eventually become CLOSED, this could mess up the reading on the gateway side and it could potentially get a false reading, i.e.the door may report closed when it is actually open. I would think I would want to send 2 things, first, the current state (cState), and second the boolean obstruction value. This way I can have the automation software alert me if there is a problem closing the door. I would then think that the sub-type of the "req" message could be a V_VAR1. I could combine the error with the state where the error would be -1. What I am not sure on is if the request would return something like -1 to 3 where -1 is an obstruction and 0 to 3 are the four internal states, or if the request would actually return Obstruction, Open, Closed, Opening or Closing?

[martinhjelmare]

@dbemowsk

My idea was that the gateway/controller should not have to care about if the device is opening or closing. From an outside view I think that the only important information is position, and in your case, if there is a problem with the door. The device should take care of logic regarding movement direction etc. The position can be reported as binary (open/closed) or perhaps percentage or both. The possible problem could also be reported as a binary state (no problem/problem). Whatever logic you would implement on the controller side for determining the correct state could most likely be implemented in the device, so that correct position is reported and if there is a problem.

But of course you're free to use all the possibilities of the mysensors API to your liking. Whatever works. That's one of the things that makes mysensors great.

There's the S_COVER type with V_UP, V_DOWN, V_STOP and V_PERCENTAGE, that you can use besides the binary types.

Regarding the custom types, V_VAR1 etc, they will contain whatever payload you set.

[dbemowsk]

@martinhjelmare
Many thanks for your input on this.

I kind of see your point that the gateway/controller should not have to care about if the device is opening or closing. One issue in that though is that if a status request is sent say immediately after the door is triggered to close, it may be 10 seconds or more before a determination can be made as to whether the door is open or closed. Do I then make the gateway/controller wait for the status? Or do I say that if the gateway/controller receives a status of OPENING or CLOSING, it can then check back in say 10 seconds or whatever to get the actual state of the door (OPEN or CLOSED). I guess I don't know how often polling would take place on the controller side.

One other thing that I am a bit confused on is whether I would need to present two child nodes, one for the trigger relay, and one for the door status, or if I would present one child that would handle the trigger and status both?

Like I say, I am still pretty new to this and am trying to get my bearings on how things work with MySensors.

[martinhjelmare]

@dbemowsk

I think you make a good point that it can be important to know if the door is still moving or not after a command has been sent from the controller to go to a position or to move.

I would use the V_UP and V_DOWN types for this. Also, it's best if the device pushes updates to the gateway and controller so that you don't need to poll the device from the controller all the time.

You can have multiple different v_types for one child and s_type, but if you need more than one of the same v_type you should add a child. Also, your controller might limit your options depending on how it has implemented the mysensors API.

[mikeones]

@martinhjelmare

V_UP and V_DOWN are a great suggestion. I use a distance sensor on my garage door for the state. This will let me know when a button push occurred or a remote open was used.

[dbemowsk]

@martinhjelmare said:

You can have multiple different v_types for one child and s_type, but if you need more than one of the same v_type you should add a child. Also, your controller might limit your options depending on how it has implemented the mysensors API.

So with the serial API, are you limited to the variables defined for a sensor, or are those just suggestions. So for S_DIMMER, am I limited to V_UP, V_DOWN, V_STOP, V_PERCENTAGE? The reason I ask is if I used S_DIMMER Can I handle the incoming toggle request using that? That is the reason I asked if I needed to use two child nodes.

So I am guessing that by pushing updates you are talking about doing a gw.send immediately after a state change. I can see that being much better than having to send a polling request to get the status.

[martinhjelmare]

@dbemowsk

There's no inherit connection between s_types and v_types in the API, but the docs for the mysensors API groups them as a suggestion, I would say. The controllers, though, will probably have some kind of limit on the usage of the types. Each controller has to account for its implementation of the mysensors API.

In the sketch you can combine V_STATUS with for example V_UP, V_DOWN and V_PERCENTAGE for S_COVER, yes, but you have to figure out how the controller will respond to that combination, if it will work or not.

Regarding pushing updates, yes, after each state change etc, send in the new value.

[dbemowsk]

The only thing I would need the incoming status for would be to toggle the opener on. Once toggled on, shutting the relay off is done internally on a timer. The relay would emulate a momentary button press, so it would only be on for a second or two. The rest is just pushing the status back to the controller.

Then my next step is going to be to actually try to compile this and upload it. What kind of command would I need to send from the serial monitor to activate the relay since I do not have any automation software set up yet?

[dbemowsk]

OK, I finally got around to finishing the first sketch that I am going to test for this.

/*
MyGarageDoor for MySensors

Arduino garage door control

June 16,2016

This will allow the MySensors gateway to monitor and control your garage door opener.  This will 
monitor the internal upper and lower limit switches of the door opener to determine door position 
for status as well as have a relay switched output that can control either the momentary contact 
switch connected to the door opener or wired directly to the switch contacts of a door opener 
remote to activate the door.

This sketch features the following:

* Allows you to monitor the door position and return it's status based on the following:
    1 - When either the upper or lower door limit switches are reached, the door is said to be 
        either fully open or fully closed. When a limit switch is triggered, the lastLimit and 
        currentState variables are set to either OPEN or CLOSED based on the limit switch that was 
        triggered.
    2 - If the upper and lower limit inputs both read high, then the door is said to be in motion.
        The door's direction of motion is determined from the lastLimit variable.  If the lastLimit
        of the door is OPEN, then the currentState variable should be set to CLOSING.  If the 
        lastLimit of the door is CLOSED, then the currentState variable should be set to OPENING.
* Checks for door obstructions and throws an error by checking the currentState and lastLimit 
  variables when the upper limit is reached.  If the upper limit is triggered and the currentState 
  is set to CLOSING and the lastLimit is set to OPEN, this should indicate that the door reversed 
  when closing and returned to the fully opened position.  The error state should only appear if 
  BOTH the lastLimit and currentState conditions match.  If lastLimit is OPEN and the lastState is 
  OPENING, this would indicate that the door was manually reversed.  This chech should only be 
  needed when the upper limit is reached.
* Allows you to toggle the opener to either open or close the door.  When the door is toggled, the 
  currentState should be checked and if the state is either OPENING or CLOSING, the currentState 
  should invert telling that the door has changed direction.  This is done to prevent an error if 
  the door is reversed manually when closing.

PARTS LIST:
* Arduino pro mini
* nRF24L01 radio module
* AMS1117 3.3v regulator
* 0.1uf capacitor
* 10uf electrolytic capacitor
* 4.7uf electrolytic capacitor (for radio module)
* 5v reed relay
* 2N3904 transistor for relay
* 1k resistor
* Two small signal diodes for incoming signals from door opener

Wiring from garage door opener
Yellow = Upper limit D7
Brown = Lower limit D8
Gray = Signal ground

Relay D5
*/

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

#define SKETCH_NAME "MyGarageDoor"
#define SKETCH_VERSION "1.0"

#define CHILD_ID 0

#define UPPER_LIMIT_SENSOR 7  //Pin used for input from the garage door upper limit sensor
#define LOWER_LIMIT_SENSOR 8  //Pin used for input from the garage door lower limit sensor
#define DOOR_ACTUATOR_RELAY 5 //Pin used to toggle the door actuator relay
#define RELAY_ON 1            // GPIO value to write to turn on attached relay
#define RELAY_OFF 0           // GPIO value to write to turn off attached relay

#define TOGGLE_INTERVAL 2000  //Tells how many milliseconds the relay will be held closed

#define CLOSED 0
#define OPEN 1
#define CLOSING 2
#define OPENING 3

//const char *currentState[] = { "Closed", "Open", "Closing", "Opening" };

int cState;     //Current state of the door
int lState;     //Last state of the door
int lLimit = 0; //The last full limit position of the door (open or closed)

boolean obstruction = false; //Used for the error condition when the door is unexpectedly reversed

SimpleTimer timer; //The timer object used for toggling the door opener

MySensor gw;
MyMessage msg(CHILD_ID, V_VAR1);

/**
 * setup - Initialize the garage door sensor
 */
void setup() { 
  pinMode(UPPER_LIMIT_SENSOR, INPUT);
  pinMode(LOWER_LIMIT_SENSOR, INPUT);
  pinMode(DOOR_ACTUATOR_RELAY, OUTPUT);

  Serial.println( SKETCH_NAME ); 
  gw.begin( incomingMessage, AUTO );
  
  gw.sendSketchInfo( SKETCH_NAME, SKETCH_VERSION );
  
  // Register the garage door sensor with the gateway
  gw.present( CHILD_ID, S_BINARY );

  //Get the current door state
  getState();
}


void loop() {
  // Alway process incoming messages whenever possible
  gw.process();

  //For every cycle while the door is opening or closing, we'll get the state of the door to see 
  //when the door has reached it's upper or lower limit.  Once the door has reached it's fully
  //open or fully closed position, we'll set the last limit to the current state
  if ( (cState == OPENING) || (cState == CLOSING) ) {
    getState();
    if ( (cState == OPEN) || (cState == CLOSED) ) {
      setLastLimit( cState );
    }

    //Here we check if the state has changed and update the gateway with the change.  We do this 
    //after all processing of the state because we need to know if there was an obstruction
    if (lState != cState) {
      gw.send( msg.set( obstruction == true ? -1 : cState ) );  //"obstr" : currentState[cState]);
    }
  }
}

void incomingMessage( const MyMessage &message ) {
  //We only expect one type of message from controller. But we better check anyway.
  if ( (message.type == V_STATUS) && (message.getBool() == RELAY_ON) ) {
     //Toggle the door opener
     toggleDoor();
  }
}

/**
 *toggleDoor - Used to activate the garage door opener
 */
void toggleDoor() {
  digitalWrite( DOOR_ACTUATOR_RELAY, RELAY_ON );
  timer.setTimeout( TOGGLE_INTERVAL, relayOff );
}

/**
 *relayOff - Used to turn off the door opener relay after the TOGGLE_INTERVAL
 */
void relayOff() {
  digitalWrite( DOOR_ACTUATOR_RELAY, RELAY_OFF );
}

/**
 *getState - Used to get the current state of the garage door.  This will set the cState variable
             to either OPEN, CLOSED, OPENING and CLOSING
 */
void getState() {
  int upper = digitalRead( UPPER_LIMIT_SENSOR ); //read the upper sensor
  int lower = digitalRead( LOWER_LIMIT_SENSOR ); //read the lower sensor

  //Save the last state of the door for later tests
  lState = cState;

  //Check if the door is open
  if ((upper == HIGH) && (lower == LOW)) {
    //Set the current state to open
    cState = OPEN;
  //Check if the door is closed
  } else if ((upper == LOW) && (lower == HIGH)) {
    //Set the current state to closed
    cState = CLOSED;
  //Check if the door is in motion
  } else if ((upper == HIGH) && (lower == HIGH)) {
    //If in motion and the last full position of the door was open
    if (lLimit == OPEN) {
      //Set the current state to closing
      cState = CLOSING;
    //If in motion and the last full position of the door was closed
    } else {
      //Set the current state to opening
      cState = OPENING;
    }
  }
}

void setLastLimit( int limit ) {
  //Here is where we check for our error condition
  if ( (lLimit == OPEN) && (limit == OPEN) && (lState == CLOSING) ) {
    //An obstruction has reversed the door.  No need to set the last limit because it already equals
    //the limit we are trying to set it to
    obstruction = true;
  //If we made it here and the last limit does not equal the limit we are setting then change it.  If
  //the last limit is equal to the limit we are setting then the last state was something other than 
  //closing, so we don't need to do anything.
  } else if ( lLimit != limit ) {
    //Everything okay, set the last limit
    lLimit = limit;
  }
}

My problem though is that when I compile it I get a warning:
WARNING: Category '' in library UIPEthernet is not valid. Setting to 'Uncategorized'
First off, the sketch in no way uses ethernet. Not even sure what UIPEthernet is, The googling I have done on this warning has led me to some posts that say that people using arduino 1.6.6 and I think even 1.6.7 have reverted back to 1.6.5 and their sketches compiled fine. I am running 1.6.9. I have not tried to find a version of 1.6.5 yet to see if that works, but before I do I have questions.
First, is this a warning I need to worry about? The sketch compiles and uploads to the pro mini fine.
Second, would there be any issues reverting to 1.6.5 while using MySensors 1.5?
Third, could the issue be something with the MySensors library?

Thanks

[dbemowsk]

So here is my circuit. It looks crude right now dangling from my door opener, but I have it working. I have the nRF24 radio on a bit of a pigtail because I am thinking that I may need to mount this somewhere outside the garage door opener housing. If I leave it inside the housing it will be completely enclosed in a metal shield and I am afraid that that may interfere with the radio.

I had to modify my original sketch that I originally posted here quite a bit. Here is the modified working sketch.

/*
  MyGarageDoor for MySensors

  Arduino garage door control

  June 16,2016

  This will allow the MySensors gateway to monitor and control your garagedoor opener.  This will
  monitor the internal upper and lower limit switches of the door openerto determine door position
  for status as well as have a relay switched output that can controleither the momentary contact
  switch connected to the door opener or wired directly to the switchcontacts of a door opener
  remote to activate the door.

  This sketch features the following:

  Allows you to monitor the door position and return it's status based on the following:
    1 - When either the upper or lower door limit switches are reached,the door is said to be
        either fully open or fully closed. When a limit switch is triggered, the lastLimit and
        currentState variables are set to either OPEN or CLOSED based on the limit switch that was
        triggered.
    2 - If the upper and lower limit inputs both read high, then the dooris said to be in motion.
        The door's direction of motion is determined from the lastLimit variable.  If the lastLimit
        of the door is OPEN, then the currentState variable should be setto CLOSING.  If the
        lastLimit of the door is CLOSED, then the currentState variable should be set to OPENING.
  Checks for door obstructions and throws an error by checking the currentState and lastLimit
  variables when the upper limit is reached.  If the upper limit is triggered and the currentState
  is set to CLOSING and the lastLimit is set to OPEN, this should indicate that the door reversed
  when closing and returned to the fully opened position.  The error state should only appear if
  BOTH the lastLimit and currentState conditions match.  If lastLimit isOPEN and the lastState is
  OPENING, this would indicate that the door was manually reversed.  This check should only be
  needed when the upper limit is reached.
  Allows you to toggle the opener to either open or close the door.  When the door is toggled, the
  currentState should be checked and if the state is either OPENING or CLOSING, the currentState
  should invert telling that the door has changed direction.  This is done to prevent an error if
  the door is reversed manually when closing.

  PARTS LIST:
  Arduino pro mini
  nRF24L01 radio module
  AMS1117 3.3v regulator
  0.1uf capacitor
  10uf electrolytic capacitor
  4.7uf electrolytic capacitor (for radio module)
  5v reed relay
  2N3904 transistor for relay
  1k resistor
  Two small signal diodes for incoming signals from door opener

  Wiring from garage door opener
  Yellow = Upper limit D7
  Brown = Lower limit D8
  Gray = Signal ground

  Relay D5
*/

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

#define SKETCH_NAME "MyGarageDoor"
#define SKETCH_VERSION "1.0"

#define CHILD_ID 0

#define UPPER_LIMIT_SENSOR 8  //Pin used for input from the garage door upper limit sensor
#define LOWER_LIMIT_SENSOR 7  //Pin used for input from the garage door lower limit sensor
#define DOOR_ACTUATOR_RELAY 5 //Pin used to toggle the door actuator relay
#define RELAY_ON 1            // GPIO value to write to turn on attached relay
#define RELAY_OFF 0           // GPIO value to write to turn off attached relay

#define TOGGLE_INTERVAL 1000  //Tells how many milliseconds the relay will be held closed

#define CLOSED 0
#define OPEN 1
#define CLOSING 2
#define OPENING 3

const char *currentState[] = { "Closed", "Open", "Closing", "Opening" };

int cState;     //Current state of the door
int lState;     //Last state of the door
int lLimit = 0; //The last full limit position of the door (open or closed)

boolean obstruction = false; //Used for the error condition when the door is unexpectedly reversed

MySensor gw;
MyMessage msg(CHILD_ID, V_VAR1);

/**
   setup - Initialize the garage door sensor
*/
void setup() {

  pinMode(UPPER_LIMIT_SENSOR, INPUT);
  pinMode(LOWER_LIMIT_SENSOR, INPUT);
  pinMode(DOOR_ACTUATOR_RELAY, OUTPUT);

  Serial.println( SKETCH_NAME );
  gw.begin( incomingMessage, AUTO );

  gw.sendSketchInfo( SKETCH_NAME, SKETCH_VERSION );

  // Register the garage door sensor with the gateway
  gw.present( CHILD_ID, S_BINARY );

  //Get the current door state
  getState();
}


void loop() {

  // Alway process incoming messages whenever possible
  gw.process();

  //Get the state of the door
  getState();

  //Here we check if the state has changed and update the gateway with the change.  We do this
  //after all processing of the state because we need to know if there was an obstruction
  if (lState != cState) {
    gw.send( msg.set( obstruction == true ? "OBSTRUCTION" : currentState[cState] ) ); 

    //Once the obstruction is checked and sent, we can clear it
    obstruction = false;

    //If the current state is full open or full closed we need to set the last limit
    if ( (cState == OPEN) || (cState == CLOSED) ) {
      setLastLimit( cState );
    }
  }

  if ( digitalRead( DOOR_ACTUATOR_RELAY ) == 1) {
    relayOff();
  }
}

void incomingMessage( const MyMessage &message ) {

  //We only expect one type of message from controller. But we better check anyway.
  if ( (message.type == V_STATUS) && (message.getBool() == RELAY_ON) ) {
    //Toggle the door opener
    toggleDoor();
  }
}

/**
  toggleDoor - Used to activate the garage door opener
*/
void toggleDoor() {

  digitalWrite( DOOR_ACTUATOR_RELAY, RELAY_ON );
  //Keep the relay on for the amount of time defined by TOGGLE_INTERVAL
  delay( TOGGLE_INTERVAL );
}

/**
  relayOff - Used to turn off the door opener relay after the TOGGLE_INTERVAL
*/
void relayOff() {

  digitalWrite( DOOR_ACTUATOR_RELAY, RELAY_OFF );
}

/**
  getState - Used to get the current state of the garage door.  This will set the cState variable
             to either OPEN, CLOSED, OPENING and CLOSING
*/
void getState() {
  int upper = digitalRead( UPPER_LIMIT_SENSOR ); //read the upper sensor
  int lower = digitalRead( LOWER_LIMIT_SENSOR ); //read the lower sensor

  //Save the last state of the door for later tests
  lState = cState;

  //Check if the door is open
  if ((upper == HIGH) && (lower == LOW)) {
    //Set the current state to open
    cState = OPEN;
    //Check if the door is closed
  } else if ((upper == LOW) && (lower == HIGH)) {
    //Set the current state to closed
    cState = CLOSED;
    //Check if the door is in motion
  } else if ((upper == HIGH) && (lower == HIGH)) {
    //If in motion and the last full position of the door was open
    if (lLimit == OPEN) {
      //Set the current state to closing
      cState = CLOSING;
      //If in motion and the last full position of the door was closed
    } else {
      //Set the current state to opening
      cState = OPENING;
    }
  }
}

void setLastLimit( int limit ) {
  //Here is where we check for our error condition
  if ( (lLimit == OPEN) && (limit == OPEN) && (lState == CLOSING) ) {
    //An obstruction has reversed the door.  No need to set the last limit because it already equals
    //the limit we are trying to set it to
    obstruction = true;
    //If we made it here and the last limit does not equal the limit we are setting then change it.  If
    //the last limit is equal to the limit we are setting then the last state was something other than
    //closing, so we don't need to do anything.
  } else if ( lLimit != limit ) {
    //Everything okay, set the last limit
    lLimit = limit;
    obstruction = false;
  }
}

Here are some results as seen by MYSController

6/25/2016 23:16:22      TX      1;0;1;0;2;1
6/25/2016 23:16:22      RX      0;0;3;0;9;send: 0-0-1-1 s=0,c=1,t=2,pt=0,l=1,sg=0,st=ok:1
6/25/2016 23:16:23      RX      0;0;3;0;9;read: 1-1-0 s=0,c=1,t=24,pt=0,l=7,sg=0:Opening
6/25/2016 23:16:23      RX      1;0;1;0;24;Opening
6/25/2016 23:16:34      RX      0;0;3;0;9;read: 1-1-0 s=0,c=1,t=24,pt=0,l=4,sg=0:Open
6/25/2016 23:16:34      RX      1;0;1;0;24;Open
6/25/2016 23:16:39      TX      1;0;1;0;2;1
6/25/2016 23:16:39      RX      0;0;3;0;9;send: 0-0-1-1 s=0,c=1,t=2,pt=0,l=1,sg=0,st=ok:1
6/25/2016 23:16:40      RX      0;0;3;0;9;read: 1-1-0 s=0,c=1,t=24,pt=0,l=7,sg=0:Closing
6/25/2016 23:16:40      RX      1;0;1;0;24;Closing
6/25/2016 23:16:50      RX      0;0;3;0;9;read: 1-1-0 s=0,c=1,t=24,pt=0,l=6,sg=0:Closed
6/25/2016 23:16:50      RX      1;0;1;0;24;Closed
6/25/2016 23:19:18      TX      1;0;1;0;2;1
6/25/2016 23:19:18      RX      0;0;3;0;9;send: 0-0-1-1 s=0,c=1,t=2,pt=0,l=1,sg=0,st=ok:1
6/25/2016 23:19:19      RX      0;0;3;0;9;read: 1-1-0 s=0,c=1,t=24,pt=0,l=7,sg=0:Opening
6/25/2016 23:19:19      RX      1;0;1;0;24;Opening
6/25/2016 23:19:29      RX      0;0;3;0;9;read: 1-1-0 s=0,c=1,t=24,pt=0,l=4,sg=0:Open
6/25/2016 23:19:29      RX      1;0;1;0;24;Open
6/25/2016 23:19:42      TX      1;0;1;0;2;1
6/25/2016 23:19:42      RX      0;0;3;0;9;send: 0-0-1-1 s=0,c=1,t=2,pt=0,l=1,sg=0,st=ok:1

Overall I think it turned out good for my first sensor. Now I just need to figure out how to tidy things up and get the garage door opener case put back together with everything inside and somehow protect the wires and things from the gears (only one of real concern). I am thinking a few zip ties.

The next step will be getting my Orange Pi to work with Domoticz and controlling MySensor devices.

[dbemowsk]

So I finally got a sketch that gives me all of the functions that I need for my garage door. The two main things that I needed were a way to toggle the door opener, and a way to display the current state of the door in Domoticz. Getting to the door to toggle open and closed was easy. The hard part was getting Domoticz to display the state of the door. I was told by @AWI that I needed a V_TEXT variable and a S_TEXT sencode:sor type. He mentioned that these were not available in version 1.5, but they could be added manually in your sketch by adding these lines of code to your sketch:

// new V_TEXT variable type (development 20150905)
const int V_TEXT = 47 ;
// new S_INFO sensor type (development 20150905)
const int S_INFO = 36 ;

Here is the final working sketch:

 /*
  MyGarageDoor for MySensors

  Arduino garage door control

  June 16,2016

  This will allow the MySensors gateway to monitor and control your garage door opener.  This will
  monitor the internal upper and lower limit switches of the door opener to determine door position
  for status as well as have a relay switched output that can control either the momentary contact
  switch connected to the door opener or wired directly to the switch contacts of a door opener
  remote to activate the door.

  This sketch features the following:

  Allows you to monitor the door position and return it's status based on the following:
    1 - When either the upper or lower door limit switches are reached, the door is said to be
        either fully open or fully closed. When a limit switch is triggered, the lastLimit and
        currentState variables are set to either OPEN or CLOSED based on the limit switch that was
        triggered.
    2 - If the upper and lower limit inputs both read high, then the door is said to be in motion.
        The door's direction of motion is determined from the lastLimit variable.  If the lastLimit
        of the door is OPEN, then the currentState variable should be set to CLOSING.  If the
        lastLimit of the door is CLOSED, then the currentState variable should be set to OPENING.
  Checks for door obstructions and throws an error by checking the currentState and lastLimit
  variables when the upper limit is reached.  If the upper limit is triggered and the currentState
  is set to CLOSING and the lastLimit is set to OPEN, this should indicate that the door reversed
  when closing and returned to the fully opened position.  The error state should only appear if
  BOTH the lastLimit and currentState conditions match.  If lastLimit is OPEN and the lastState is
  OPENING, this would indicate that the door was manually reversed.  This chech should only be
  needed when the upper limit is reached.
  Allows you to toggle the opener to either open or close the door.  When the door is toggled, the
  currentState should be checked and if the state is either OPENING or CLOSING, the currentState
  should invert telling that the door has changed direction.  This is done to prevent an error if
  the door is reversed manually when closing.

  PARTS LIST:
  Arduino pro mini
  nRF24L01 radio module
  AMS1117 3.3v regulator
  0.1uf capacitor
  10uf electrolytic capacitor
  4.7uf electrolytic capacitor (for radio module)
  5v reed relay
  2N3904 transistor for relay
  1k resistor
  Two small signal diodes for incoming signals from door opener

  Wiring from garage door opener
  Yellow = Upper limit D7
  Brown = Lower limit D8
  Gray = Signal ground

  Relay D5

  Version history:
  1.1 : Added the V_TEXT variable and S_INFO sensor type, and created the "Status" child
*/

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

#define SKETCH_NAME "MyGarageDoor"
#define SKETCH_VERSION "1.1"

#define CHILD_ID_OPENER 0
#define CHILD_ID_STATUS 1

#define UPPER_LIMIT_SENSOR 8  //Pin used for input from the garage door upper limit sensor
#define LOWER_LIMIT_SENSOR 7  //Pin used for input from the garage door lower limit sensor
#define DOOR_ACTUATOR_RELAY 5 //Pin used to toggle the door actuator relay
#define RELAY_ON 1            // GPIO value to write to turn on attached relay
#define RELAY_OFF 0           // GPIO value to write to turn off attached relay

#define TOGGLE_INTERVAL 1000  //Tells how many milliseconds the relay will be held closed

#define CLOSED 0
#define OPEN 1
#define CLOSING 2
#define OPENING 3

// new V_TEXT variable type (development 20150905)
const int V_TEXT = 47 ;
// new S_INFO sensor type (development 20150905)
const int S_INFO = 36 ;

const char *currentState[] = { "Closed", "Open", "Closing", "Opening" };

//Current state of the door
int cState;     

//Last state of the door
int lState;     

//The last full limit position of the door (open or closed)
int lLimit = 0; 

//Used for the error condition when the door is unexpectedly reversed
boolean obstruction = false;

MySensor gw;
MyMessage msgOpener(CHILD_ID_OPENER, V_STATUS);
MyMessage msgStatus(CHILD_ID_STATUS, V_TEXT);

/**
 * setup - Initialize the garage door sensor
 */
void setup() {
  
  pinMode(UPPER_LIMIT_SENSOR, INPUT);
  pinMode(LOWER_LIMIT_SENSOR, INPUT);
  pinMode(DOOR_ACTUATOR_RELAY, OUTPUT);

  Serial.println( SKETCH_NAME );
  gw.begin( incomingMessage, AUTO );

  gw.sendSketchInfo( SKETCH_NAME, SKETCH_VERSION );

  // Register the garage door sensor with the gateway
  gw.present( CHILD_ID_OPENER, S_BINARY );
  gw.present( CHILD_ID_STATUS, S_INFO );
}

/**
 * loop - The main program loop
 */
void loop() {
  
  // Alway process incoming messages whenever possible
  gw.process();

  //Get the state of the door
  getState();

  //Here we check if the state has changed and update the gateway with the change.  We do this
  //after all processing of the state because we need to know if there was an obstruction
  if (lState != cState) {
    gw.send( msgStatus.set( obstruction == true ? "OBSTRUCTION" : currentState[cState] ) );  

    //Once the obstruction is checked and sent, we can clear it
    obstruction = false;

    //If the current state is full open or full closed we need to set the last limit
    if ( (cState == OPEN) || (cState == CLOSED) ) {
      setLastLimit( cState );
    }
  }

  //If the relay is on, shut it off
  if ( digitalRead( DOOR_ACTUATOR_RELAY ) == 1) {
    relayOff();                       
  }
}

/**
 * incomingMessage - Process the incoming messages and watch for an incoming boolean 1
 *                   to toggle the garage door opener.
 */
void incomingMessage( const MyMessage &message ) {
  
  //We only expect one type of message from controller. But we better check anyway.
  if ( (message.type == V_STATUS) && (message.getBool() == RELAY_ON) ) {
    //Toggle the door opener
    toggleDoor();
  }
}

/**
 * toggleDoor - Used to activate the garage door opener
 */
void toggleDoor() {

  digitalWrite( DOOR_ACTUATOR_RELAY, RELAY_ON );
  //Keep the relay on for the amount of time defined by TOGGLE_INTERVAL
  delay( TOGGLE_INTERVAL );
}

/**
 * relayOff - Used to turn off the door opener relay after the TOGGLE_INTERVAL
 */
void relayOff() {

  digitalWrite( DOOR_ACTUATOR_RELAY, RELAY_OFF );
  //Added this to tell the controller that we shut off the relay
  gw.send( msgOpener.set(0) );
}

/**
 * getState - Used to get the current state of the garage door.  This will set the cState variable
 *            to either OPEN, CLOSED, OPENING and CLOSING
 */
void getState() {
  int upper = digitalRead( UPPER_LIMIT_SENSOR ); //read the upper sensor
  int lower = digitalRead( LOWER_LIMIT_SENSOR ); //read the lower sensor

  //Save the last state of the door for later tests
  lState = cState;

  //Check if the door is open
  if ((upper == HIGH) && (lower == LOW)) {
    //Set the current state to open
    cState = OPEN;
    //Check if the door is closed
  } else if ((upper == LOW) && (lower == HIGH)) {
    //Set the current state to closed
    cState = CLOSED;
    //Check if the door is in motion
  } else if ((upper == HIGH) && (lower == HIGH)) {
    //If in motion and the last full position of the door was open
    if (lLimit == OPEN) {
      //Set the current state to closing
      cState = CLOSING;
      //If in motion and the last full position of the door was closed
    } else {
      //Set the current state to opening
      cState = OPENING;
    }
  }
}

/**
 * setLastLimit - Checks the limit passed with the last limit (lLimit) and sets the last limit
 *                if there was a change.  It also checks the states against the limits and issues 
 *                an obstruction error if the limit and last limit
 *                
 * @param limit  integer limit - The limit to be checked
 */
void setLastLimit( int limit ) {
  //Here is where we check for our error condition
  if ( (lLimit == OPEN) && (limit == OPEN) && (lState == CLOSING) ) {
    //An obstruction has reversed the door.  No need to set the last limit because it already equals
    //the limit we are trying to set it to
    obstruction = true;
    //If we made it here and the last limit does not equal the limit we are setting then change it.  If
    //the last limit is equal to the limit we are setting then the last state was something other than
    //closing, so we don't need to do anything.
  } else if ( lLimit != limit ) {
    //Everything okay, set the last limit
    lLimit = limit;
    obstruction = false;
  }
}

[dbemowsk]

This post is deleted!

[Dringie]

@dbemowsk Thanks for sharing

[dbemowsk]

@Dringie The only thing I think that I am going to add for now is to turn this on as a repeater node. I have this wired for power with an old modified wall brick cell phone charger that was 5 volts, so it will be powered all the time. I think it is a good place for a repeater anyway. If you find any problems or can suggest any improvements, I am all ears.

[Dringie]

I will also use signing when I get round to building this node.

Waiting for the signing chips from China.

I might add a relay for lights, so the lights come on at night when opened. (Night lua code to be used in domoticz).

Postman feature is something I'm going over in my head. E.g.. When postman delivers a parcel I can remotely open the garage slightly and it close again after 30 secs. Not sure if I want to write code in the node or in Domoticz. I think the node would be more fail proof.

[dbemowsk]

@Dringie What type of garage door opener do you have?

[Dringie]

@dbemowsk

Hormann motor, 3 section up and over door. I have placed position magnet sensors on the door runner.

My door works like yours with obstacles.

I will wire my node straight into the motor.

For the postman feature, I was going to add an extra reed switch on the runner to stop the door at a low hight.