@Mercury69
It was written prior to the MySensors 2.0 update.
You can convert pre- 2.0 sketches by following the instructions on https://forum.mysensors.org/topic/4276/converting-a-sketch-from-1-5-x-to-2-0-x
If you need a hand just post here with your question, I'll try to help, but it's really not too bad once you get started. I'm in the process of converting all of my code to 2.0 as well.
Yes, regardless of the source, always check the spec sheet and even take some measurements your self when you get it to be sure.
You can use resistors as voltage dividers, or use optocouplers/relays, or even burn it off with a step down voltage regulator like an LM7805. You will need to supply ~12V to the sensor too, as that is what it is designed for in a burglar alarm system, so take that into account. This one says it will operate off 9V, but don't count on powering it long off a 9V square battery. 
@chaeron They are all over ebay.
The way they work with a wired alarm system (like almost all wired alarm sensors) is there is a normally closed circuit, and if the sensor detects something it opens the circuit. (this is so that cutting the wire to the sensor also trips the alarm)
This is dead simple to interface with, just hook it up between VCC a 12V battery and any digital pin (via some method of stepping down the voltage) that is pulled low. If the pin goes low the alarm is triggered.
[Edits in Bold: slight correction, guess I was more tired than I wanted to admit last night]
http://www.ebay.com/itm/Generic-Glass-Break-Detector-for-Wired-Wireless-Burglar-Alarm-PA-456-/222030136167?hash=item33b2070367:g:AJgAAOSwyQtVjBN8
Nice work. I have yet to pick up an RFID reader to give that part of it a try, but I've modified it a little to have reed sensors for the 2 doors so that I can easily see if the door is open on my phone, and get notifications when the door opens at an unexpected time, like when the controller is set to vacation mode, or at times of night when we would not normally be coming and going.
I'll be watching for someone to post up a signing version.
Here's my 2 relay, 2 door sensor version.
/*
RFID Garagedoor opener by Bart Eversdijk
Modified to add door sensors by Rod MacPherson
This sketch is to open a Garage door with an mifare RIFD-tag
For an Arduino Nano v3
Connection wiring :
- nrf24l01+ as descibed on the MySensors website
- MFRC522 reader/writer MOSI, MISO, SCK, 3.3V and GND as they are on the nrf24101+, but connect RST to pin D7 and connect SDA(SS) to pin D8
- LED with 470ohm resistor between GND and pin A3
- push button between GND and pin D5
- 5v relays coil between GND and pin D4 -> switch pins of the relays should be connected in parallel with your garage door push button.
- second relay for second door on pin D3
Features:
This project can record up to 18 RFID-"tags"
These card IDs are stored in to EEPROM by keeping them next to the RFID reader when the system in program mode. (Slow blinking LED) When a card is accepted as new card the LED will blink fast for a short time.
To keep the master-tags (choose your own) next to the RFID reader when pressing the push button. To clear all cards (except the master card) press the push button in program mode for 6 seconds. The LED will now fast blink for a couple of seconds.
Your garage your can be opened by keep a registered RFID tag next to the reader or by clicking the open icon on lock node presented by this plugin.
By by-passing the alarm node presented by this plug in the RFID will be temporarily disabled.
When an incorrect (not registered) RFID tag is scanned the alarm is triggered to detect illegal scan attempts
*/
#include <SPI.h>
#include <MFRC522.h>
#include <MySensor.h>
#include <Bounce2.h>
#define RF_INIT_DELAY 125
#define ONE_SEC 1000
#define MAX_CARDS 18
#define PROG_WAIT 10
#define HEARTBEAT 10
#define BAUD 115200
/*Pin definitions*/
#define LED_PIN A3
#define SECONDRELAY 3
#define GARAGEPIN 4
#define SWITCH_PIN 5
#define RST_PIN 7 // MFRC
#define SS_PIN 8 // MFRC
#define DOOR_PIN_L A0 // Arduino Digital I/O pin for button/reed switch
#define DOOR_PIN_R A1 // Arduino Digital I/O pin for button/reed switch
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance
MFRC522::Uid olduid;
MFRC522::Uid masterkey = { 10, {0,0,0,0, 0,0,0,0, 0,0 }, 0 };
byte countValidCards = 0;
MFRC522::Uid validCards[MAX_CARDS];
void ShowCardData(MFRC522::Uid* uid);
bool sameUid(MFRC522::Uid* old, MFRC522::Uid* check);
void copyUid(MFRC522::Uid* src, MFRC522::Uid* dest);
bool isValidCard(MFRC522::Uid* uid);
int releasecnt = 0;
#define CHILD_ID_ALARM 1
#define CHILD_ID_LOCK 2
#define CHILD_ID_LOCK2 3
#define CHILD_ID_DOOR_L 4
#define CHILD_ID_DOOR_R 5
MySensor gw;
Bounce debouncer = Bounce();
Bounce debouncerDoorR = Bounce();
Bounce debouncerDoorL = Bounce();
int oldValueR=-1;
int oldValueL=-1;
int oldSwitchValue=-1;
int switchValue = 0;
long timer = -1;
bool programmode = false;
bool ledon;
int programTimer = 0;
bool armed = true;
unsigned long lastTime = 0;
MyMessage lockMsg(CHILD_ID_LOCK, V_LOCK_STATUS);
MyMessage lock2Msg(CHILD_ID_LOCK2, V_LOCK_STATUS);
MyMessage lockArmMsg(CHILD_ID_ALARM, V_ARMED);
MyMessage wrongMsg(CHILD_ID_ALARM, V_TRIPPED);
MyMessage doorRmsg(CHILD_ID_DOOR_R, V_TRIPPED);
MyMessage doorLmsg(CHILD_ID_DOOR_L, V_TRIPPED);
void setup() {
Serial.begin(BAUD); // Initialize serial communications with the PC
pinMode(GARAGEPIN, OUTPUT); // Initialise in/output ports
pinMode(SECONDRELAY, OUTPUT); // Initialise in/output ports
// Make sure MFRC will be disabled on the SPI bus
pinMode(RST_PIN, OUTPUT);
digitalWrite(RST_PIN, LOW);
pinMode(SS_PIN, OUTPUT);
digitalWrite(SS_PIN, LOW);
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, LOW);
// Setup the button
pinMode(SWITCH_PIN, INPUT_PULLUP);
// After setting up the button, setup debouncer
debouncer.attach(SWITCH_PIN);
debouncer.interval(5);
// Setup the right door sensor
pinMode(DOOR_PIN_R,INPUT);
// Activate internal pull-up
digitalWrite(DOOR_PIN_R,HIGH);
// After setting up the button, setup debouncer
debouncerDoorR.attach(DOOR_PIN_R);
debouncerDoorR.interval(5);
// Setup the left door sensor
pinMode(DOOR_PIN_L,INPUT);
// Activate internal pull-up
digitalWrite(DOOR_PIN_L,HIGH);
// After setting up the button, setup debouncer
debouncerDoorL.attach(DOOR_PIN_L);
debouncerDoorL.interval(5);
// Init mysensors library
gw.begin(incomingMessage, 5);
gw.sendSketchInfo("RFID Garage", "1.2"); delay(RF_INIT_DELAY);
// Register all sensors to gw (they will be created as child devices)
gw.present(CHILD_ID_LOCK, S_LOCK); delay(RF_INIT_DELAY);
gw.present(CHILD_ID_LOCK2, S_LOCK); delay(RF_INIT_DELAY);
gw.present(CHILD_ID_ALARM, S_MOTION); delay(RF_INIT_DELAY);
gw.present(CHILD_ID_DOOR_R, S_DOOR);
gw.present(CHILD_ID_DOOR_L, S_DOOR);
recallEeprom();
// Init MFRC RFID sensor
SPI.begin(); // Init SPI bus
mfrc522.PCD_Init(); // Init MFRC522
ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details
gw.send(lockArmMsg.set(armed));
Serial.println(F("Init done..."));
}
void loop() {
timer++;
delay(HEARTBEAT);
gw.process();
debouncer.update();
debouncerDoorL.update();
// Get the update value for Left
int valueL = debouncerDoorL.read();
if (valueL != oldValueL) {
// Send in the new value for Left
gw.send(doorLmsg.set(valueL==HIGH ? 1 : 0));
oldValueL = valueL;
}
debouncerDoorR.update();
// Get the update value for Right
int valueR = debouncerDoorR.read();
if (valueR != oldValueR) {
// Send in the new value for Right
gw.send(doorRmsg.set(valueR==HIGH ? 1 : 0));
oldValueR = valueR;
}
// Get the update value
int switchValue = debouncer.read();
if (switchValue != oldSwitchValue) {
// Send in the new value
Serial.print (F("Switch "));
Serial.println (switchValue);
if (switchValue && programmode) {
lastTime = millis() / 1000;
}
if (!switchValue && programmode && lastTime > 0) {
if ( (millis() / 1000) - lastTime > 3) {
Serial.println(F("Reset all cards"));
countValidCards = 0;
blinkFast(50);
} else {
Serial.println(F("Program off"));
digitalWrite(LED_PIN, LOW);
programmode = false;
storeEeprom();
}
}
if (!switchValue) {
programTimer = 0;
}
oldSwitchValue = switchValue;
}
if (programmode && ((timer % (ONE_SEC / HEARTBEAT)) == 0 )) {
ledon = !ledon;
digitalWrite(LED_PIN, ledon);
programTimer++;
// Stop program mode after 20 sec inactivity
if (programTimer > PROG_WAIT) {
programmode = false;
digitalWrite(LED_PIN, false);
Serial.println(F("Program expired"));
}
}
if ((timer % (200 / HEARTBEAT)) == 0 ) {
// Look for new cards
if ( ! mfrc522.PICC_IsNewCardPresent()) {
if (releasecnt > 0) {
releasecnt--;
if (!releasecnt) {
olduid.size = 0;
Serial.println(F("release"));
}
}
return;
}
releasecnt = 5;
// Select one of the cards
if ( ! mfrc522.PICC_ReadCardSerial()) {
return;
}
// Dump debug info about the card; PICC_HaltA() is automatically called
//mfrc522.PICC_DumpToSerial(&(mfrc522.uid));
if (!olduid.size || !sameUid(&(mfrc522.uid), &olduid)) {
ShowCardData(&(mfrc522.uid));
copyUid(&(mfrc522.uid), &olduid);
if ( isValidCard(&olduid) ) {
OpenDoor(programmode);
} else {
if (sameUid(&(mfrc522.uid), &masterkey)) {
// Only switch in program mode when mastercard is found AND the program button is pressed
if (switchValue) {
Serial.println(F("Program mode"));
programmode = true;
programTimer = 0;
lastTime = 0;
} else {
OpenDoor2(programmode);
}
} else {
if (programmode) {
Serial.println(F("new card"));
programTimer = 0;
if (countValidCards < MAX_CARDS)
{
// Add card to list...
copyUid(&(mfrc522.uid), &validCards[countValidCards]);
countValidCards++;
blinkFast(15);
}
} else {
Serial.println(F("Invalid card"));
if (armed) {
gw.send(wrongMsg.set(1));
delay(2000);
gw.send(wrongMsg.set(0));
}
}
}
}
}
}
}
void ShowCardData(MFRC522::Uid* uid)
{
Serial.print(F("Card UID:"));
for (byte i = 0; i < uid->size; i++) {
if(uid->uidByte[i] < 0x10) {
Serial.print(F(" 0"));
} else {
Serial.print(F(" "));
}
Serial.print(uid->uidByte[i], HEX);
}
Serial.println();
}
void copyUid(MFRC522::Uid* src, MFRC522::Uid* dest)
{
dest->size = src->size;
dest->sak = src->sak;
for (byte i = 0; i < src->size; i++) {
dest->uidByte[i] = src->uidByte[i];
}
}
bool sameUid(MFRC522::Uid* old, MFRC522::Uid* check)
{
if (old->size != check->size) {
return false;
}
for (byte i = 0; i < old->size; i++) {
if (old->uidByte[i] != check->uidByte[i]) {
return false;
}
}
return true;
}
bool isValidCard(MFRC522::Uid* uid)
{
for (byte i = 0; i < countValidCards; i++) {
if (validCards[i].size != uid->size) {
break;
}
for (int j = 0; j < uid->size; j++) {
if (validCards[i].uidByte[j] != uid->uidByte[j]) {
break;
}
if (j == (uid->size - 1)) {
return true;
}
}
}
return false;
}
void storeEeprom()
{
byte address = 0;
gw.saveState(address++, countValidCards);
for (byte i = 0; i < countValidCards; i++) {
gw.saveState(address++, validCards[i].size);
for (byte j = 0; j < 10; j++) {
gw.saveState(address++, validCards[i].uidByte[j]);
}
}
}
void recallEeprom()
{
byte address = 0;
countValidCards = gw.loadState(address++);
if (countValidCards > MAX_CARDS) {
Serial.println(F("Not a valid EEPROM reading set to default"));
countValidCards = 0;
storeEeprom();
return;
}
for (byte i = 0; i < countValidCards; i++) {
validCards[i].size = gw.loadState(address++);
for (byte j = 0; j < 10; j++) {
validCards[i].uidByte[j] = gw.loadState(address++);
}
}
}
void blinkFast(int times)
{
for (int i = 0; i < times; i++) {
ledon = !ledon;
digitalWrite(LED_PIN, ledon);
delay(100);
}
}
void OpenDoor(bool fakeOpen)
{
Serial.println(F("Open door!"));
gw.send(lockMsg.set(false));
if (!fakeOpen) {
digitalWrite(LED_PIN, HIGH);
digitalWrite(GARAGEPIN, HIGH);
}
delay(1000);
if (!fakeOpen) {
digitalWrite(GARAGEPIN, LOW);
digitalWrite(LED_PIN, LOW);
}
gw.send(lockMsg.set(true));
}
void OpenDoor2(bool fakeOpen)
{
Serial.println(F("Open door 2!"));
gw.send(lock2Msg.set(false));
if (!fakeOpen) {
digitalWrite(LED_PIN, HIGH);
digitalWrite(SECONDRELAY, HIGH);
}
delay(1000);
if (!fakeOpen) {
digitalWrite(SECONDRELAY, LOW);
digitalWrite(LED_PIN, LOW);
}
gw.send(lock2Msg.set(true));
}
void ShowReaderDetails() {
// Get the MFRC522 software version
byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
Serial.print(F("MFRC522 Software Version: 0x"));
Serial.print(v, HEX);
if (v == 0x91) {
Serial.print(F(" = v1.0"));
} else if (v == 0x92) {
Serial.print(F(" = v2.0"));
} else {
Serial.print(F(" (unknown)"));
}
Serial.println("");
// When 0x00 or 0xFF is returned, communication probably failed
if ((v == 0x00) || (v == 0xFF)) {
Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?"));
}
}
void incomingMessage(const MyMessage &message)
{
if (message.type == V_LOCK_STATUS) {
// Change relay state
if (!message.getBool()) {
switch (message.sensor)
{
case CHILD_ID_LOCK:
OpenDoor(false);
break;
case CHILD_ID_LOCK2:
OpenDoor2(false);
break;
}
}
// Write some debug info
Serial.print(F("Lock: "));
Serial.print(message.sensor);
Serial.print(F(" status: "));
Serial.println(message.getBool());
}
else
{
if (message.type == V_ARMED) {
// Change relay state
armed = message.getBool();
// Write some debug info
Serial.print(F("Arm status: "));
Serial.println(message.getBool());
}
else
{
// Write some debug info
Serial.print(F("Incoming msg type: "));
Serial.print(message.type);
Serial.print(F(" id: "));
Serial.print(message.sensor);
Serial.print(F(" content: "));
Serial.println(message.getInt());
}
}
}
In general, the way radio works you will get best performance with the antennas on both send and receive on the same orientation, (in radio terms this is called vertical or horizontal polarization) but that should not make much difference with these radios. If you are trying to go a long distance for an outdoor application you might want to try the slightly more expensive version with the SMA removable "rubber duck" antenna. There is a video series on Youtube where a guy was testing the range of these radios for use in RC aircraft models. With the small one he was able to transmit/receive at a distance of 100m reliably, with the rubber duck I believe it was around 700m. and with a circular polarization wire antenna about the same, but reliability went up.
They do seem to be sensitive to interference from anything at all in the line of sight, so if you have old plaster walls or concrete block to go though you might consider the stronger radios as well.
nRF24L01 range test (arduino) – 17:36
— iforce2d
@Dean I'm still waiting on some Nanos to arrive so I can start playing with this stuff, but I opted to order the parts for the Ethernet gateway as well, because I figure it gives me more flexibility in placement of the gateway to achieve best radio reception, and more flexibility in my ability to switch controllers later on. ...kind of wish I'd thought of making it WiFi, but I didn't want to mess around with the recipe for the controller right out of the gate.