Parking Sensor Node
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Working on the bench will install soon
Build a MySensors node to indicate when a vehicle is clear of the roller door when parking. As well as providing a visual aid for parking node will send door open/close data to the gateway. This can be used for security checks etc. by your controller. The LED strip will show three different colours
Red for when the car is in the danger area under the door
Green for when the car has cleared the door
White for a courtesy light to allow you to exit the vehicleSensor will be powered by 12v from the house auxiliary supply.
An infrared beam will be used across the door to determine when vehicle has cleared the door area. I am using a pre built IR door minder, as these can be bought for less than $8 and are in nice cases as well. Just not worth the hassle of building them from scratch
A 5v WS2811 RGB LED strip will be used to indicate vehicle position. I have used this type as they are simple to wire in, no need for driver transistors etc. I have used the fastled library to control the strip.
A N/O reed switch will be used for the garage door switch. I will mount a magnet on the door which will activate the reed switch when the door is closed
sketch
/** ******************************* * * DESCRIPTION * A node to indicate correct parking position to allow closing of garage door. * uses a pre built IR beam "door minder" to detect car position * * Connect N/O contacts of Infrared device between * pin 3 and GND. * * Connect a N/O reed switch between GND and pin 2 * * Connect RGB Led strip data terminal to pin 4 * */ #include <MySensor.h> #include <SPI.h> #include <Bounce2.h> #define FASTLED_FORCE_SOFTWARE_SPI #include "FastLED.h" #define NUM_LEDS 18 // How many leds are in the strip? change this to the number of LEDs in your strip #define DATA_PIN 4 // Data pin that led data will be written out over #define CHILD_ID 0 // door switch MySensors id number #define IR_PIN 3 // Arduino Digital I/O pin for infrared device #define DOOR_PIN 2 // pin garage door switch is connected to #define COLOR_ORDER GRB // if your not getting the right colours change the oder of GRB #define CHIPSET WS2811 // select the led type int marker = 0; // used to decide if LEDs are allowed to turn white int irValue ; // holder for ir state int doorValue ; // holder for garage door state int oldDoorValue=-1; //set to -1 to ensure current door switch status is sent at startup unsigned long startMillis = 0; // holder for the time when garage door first opens unsigned long millisNow = 0; // holder for the current time const long activeTime = 120000; // Time the sensor will stay active after garage door is opened in milliseconds. change this to suit your situation CRGB leds[NUM_LEDS]; // This is an array of leds. One item for each led in your strip. MySensor gw; Bounce debouncerA = Bounce(); // Instantiate Bounce object 1.... iR switch Bounce debouncerB = Bounce(); // Instantiate Bounce object 2.... Garage Door switch MyMessage msg(CHILD_ID,V_TRIPPED); void setup() { gw.begin(); gw.sendSketchInfo("Park Sensor", "1"); // Send the sketch version information to the gateway and Controller FastLED.addLeds<CHIPSET, DATA_PIN, COLOR_ORDER>(leds, NUM_LEDS); //Setup fastleds /* ----Setup the buttons as inputs and activate their internal pull-up resistor---- */ pinMode(IR_PIN,INPUT_PULLUP); //set pin as input and activate internal pull-up resistor pinMode(DOOR_PIN,INPUT_PULLUP); //set pin as input and activate internal pull-up resistor /* ---After setting up the buttons, setup debouncers---- */ debouncerA.attach(IR_PIN); debouncerA.interval(5); debouncerB.attach(DOOR_PIN); debouncerB.interval(5); gw.present(CHILD_ID, S_DOOR); // Register binary input sensor to gw ledChange (0,0,0) ; // Make sure LEDs are off at statup, set to black } void loop() { updateSwitches(); // call function to check switches status millisNow = millis(); // get the current time if (millisNow - startMillis < activeTime){ // check to see if timeout has been reached if (doorValue == HIGH ) { // garage door is open if (irValue == LOW ) { // car is in ir beam ledChange(255,0,0); // turn LEDs red } else{ ledChange(0,128,0); // car is out of ir beam, turn LEDs green } } else{ if (marker == 1){ ledChange(255,255,255); // door down but timer not finished. turn leds white for entry mode } } } else { // Timeout has been reached. Turn off LEDs if (marker == 1){ // check marker to only turn off if needed ledChange (0,0,0) ; // turn off leds (black) marker = 0; } } } /* --------------start of functions-------------- */ /* --Update the switches status, send door state change if required -- */ void updateSwitches (){ debouncerA.update(); // IR switch debouncerB.update(); // Door switch irValue = debouncerA.read(); // get the state of the IR switch doorValue = debouncerB.read(); // get the state of the Door switch if (doorValue != oldDoorValue) { // Check if digital input has changed and send in new value if it has gw.send(msg.set(doorValue==HIGH ? 1 : 0)); // Send in the new value if (doorValue == HIGH){ // door is open startMillis = millis(); // store start time of door opening for timeout check marker = 1; } oldDoorValue = doorValue; } } /* ----------function to change LED color------------*/ void ledChange (int r, int g, int b) { for(int ledStrip =0; ledStrip < NUM_LEDS; ledStrip++) { leds[ledStrip] = CRGB( r, g, b); } FastLED.show(); }Wiring
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Made a small change to the sketch. LEDs used to go off instantly when timer expired, now they fade out slowly.
/** ******************************* * * DESCRIPTION * A node to indicate correct parking position to allow closing of garage door. * uses a pre built IR beam "door minder" to detect car position * * Connect N/O contacts of Infrared device between * pin 3 and GND. * * Connect a N/O reed switch between GND and pin 2 * * Connect RGB Led strip data terminal to pin 4 * */ #include <MySensor.h> #include <SPI.h> #include <Bounce2.h> #define FASTLED_FORCE_SOFTWARE_SPI #include "FastLED.h" #define NUM_LEDS 18 // How many leds are in the strip? change this to the number of LEDs in your strip #define DATA_PIN 4 // Data pin that led data will be written out over #define CHILD_ID 0 // door switch MySensors id number #define IR_PIN 3 // Arduino Digital I/O pin for infrared device #define DOOR_PIN 2 // pin garage door switch is connected to #define COLOR_ORDER GRB // if your not getting the right colours change the oder of GRB #define CHIPSET WS2811 // select the led type int marker = 0; // used to decide if LEDs are allowed to turn white int irValue ; // holder for ir state int doorValue ; // holder for garage door state int oldDoorValue=-1; //set to -1 to ensure current door switch status is sent at startup unsigned long startMillis = 0; // holder for the time when garage door first opens unsigned long millisNow = 0; // holder for the current time const long activeTime = 120000; // Time the sensor will stay active after garage door is opened in milliseconds. change this to suit your situation CRGB leds[NUM_LEDS]; // This is an array of leds. One item for each led in your strip. MySensor gw; Bounce debouncerA = Bounce(); // Instantiate Bounce object 1.... iR switch Bounce debouncerB = Bounce(); // Instantiate Bounce object 2.... Garage Door switch MyMessage msg(CHILD_ID,V_TRIPPED); void setup() { gw.begin(); gw.sendSketchInfo("Park Sensor", "1"); // Send the sketch version information to the gateway and Controller FastLED.addLeds<CHIPSET, DATA_PIN, COLOR_ORDER>(leds, NUM_LEDS); //Setup fastleds /* ----Setup the buttons as inputs and activate their internal pull-up resistor---- */ pinMode(IR_PIN,INPUT_PULLUP); //set pin as input and activate internal pull-up resistor pinMode(DOOR_PIN,INPUT_PULLUP); //set pin as input and activate internal pull-up resistor /* ---After setting up the buttons, setup debouncers---- */ debouncerA.attach(IR_PIN); debouncerA.interval(5); debouncerB.attach(DOOR_PIN); debouncerB.interval(5); gw.present(CHILD_ID, S_DOOR); // Register binary input sensor to gw ledChange (0,0,0) ; // Make sure LEDs are off at statup, set to black } void loop() { updateSwitches(); // call function to check switches status millisNow = millis(); // get the current time if (millisNow - startMillis < activeTime){ // check to see if timeout has been reached if (doorValue == HIGH ) { // garage door is open if (irValue == LOW ) { // car is in ir beam ledChange(255,0,0); // turn LEDs red } else{ ledChange(0,255,0); // car is out of ir beam, turn LEDs green } } else{ if (marker == 1){ ledChange(255,255,255); // door down but timer not finished. turn leds white for entry mode } } } else { // Timeout has been reached. Turn off LEDs if (marker == 1){ // check marker to only turn off if needed //ledChange (0,0,0) ; // turn off leds (black) for(int ledStrip =0; ledStrip < NUM_LEDS; ledStrip++) { leds[ledStrip].fadeToBlackBy( 1 ); // fade leds off FastLED.delay(1); } FastLED.show(); marker = 0; } } } /* --------------start of functions-------------- */ /* --Update the switches status, send door state change if required -- */ void updateSwitches (){ debouncerA.update(); // IR switch debouncerB.update(); // Door switch irValue = debouncerA.read(); // get the state of the IR switch doorValue = debouncerB.read(); // get the state of the Door switch if (doorValue != oldDoorValue) { // Check if digital input has changed and send in new value if it has gw.send(msg.set(doorValue==HIGH ? 1 : 0)); // Send in the new value if (doorValue == HIGH){ // door is open startMillis = millis(); // store start time of door opening for timeout check marker = 1; } oldDoorValue = doorValue; } } /* ----------function to change LED color------------*/ void ledChange (int r, int g, int b) { for(int ledStrip =0; ledStrip < NUM_LEDS; ledStrip++) { leds[ledStrip] = CRGB( r, g, b); } FastLED.show(); }
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Set this all up last week and ran in to a problem with the code. The arduino would lock up after running for around 30 hours, it would seem there may be some form of conflict between the fastled and mysensors libraries when it comes to spi use.
Anyway I seem to have it working by forcing fastled to use software spi with
#define FASTLED_FORCE_SOFTWARE_SPII have changed both sketches to include this line and so far all seems good, it has been running ok for 3 days now so hopefully that has it sorted.
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This has been running without trouble for a couple of weeks now so it looks to be ok. just posting a couple of pics
I have used the Easy pcb https://www.openhardware.io/view/4/EasyNewbie-PCB-for-MySensors by @sundberg84 . here it is in the case, the mounting pillars even lined up to the boards screw holes!
Here is the case all closed and ready to mount
To hold the magnet I cut the spindle of of an old dvd holder and glued the magnet inside. For the reed switch I used an old pen case, the reed switch was a neat fit inside.
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Updated the sketch for MySensors V2 and am now using the Adafruit Neopixel library
/** ******************************* * * DESCRIPTION * A node to indicate correct parking position to allow closing of garage door. * uses a pre built IR beam "door minder" to detect car position *MySensors V2 and using Adafruit neopixel library and bounce2 library * Connect N/O contacts of Infrared device between * pin 3 and GND. * * Connect a N/O reed switch between GND and pin 2 * * Connect RGB Led strip data terminal to pin 4 * */ // Enable debug prints to serial monitor #define MY_DEBUG // Enable and select radio type attached #define MY_RADIO_NRF24 #include "MySensors.h" #include <SPI.h> #include <Bounce2.h> #include <Adafruit_NeoPixel.h> #define NUM_LEDS 18 // How many leds are in the strip? change this to the number of LEDs in your strip #define PIN 4 // Data pin that led data will be written out over #define CHILD_ID 0 // door switch MySensors id number #define IR_PIN 3 // Arduino Digital I/O pin for infrared device #define DOOR_PIN 2 // pin garage door switch is connected to int marker = 0; // used to decide if LEDs are allowed to turn white int irValue ; // holder for ir state int doorValue ; // holder for garage door state int oldDoorValue=-1; //set to -1 to ensure current door switch status is sent at startup unsigned long startMillis = 0; // holder for the time when garage door first opens unsigned long millisNow = 0; // holder for the current time const long activeTime = 120000; // Time the sensor will stay active after garage door is opened in milliseconds. change this to suit your situation Bounce debouncerA = Bounce(); // Instantiate Bounce object 1.... iR switch Bounce debouncerB = Bounce(); // Instantiate Bounce object 2.... Garage Door switch MyMessage msg(CHILD_ID,V_TRIPPED); // Parameter 1 = number of pixels in strip // Parameter 2 = Arduino pin number (most are valid) // Parameter 3 = pixel type flags, add together as needed: // NEO_KHZ800 800 KHz bitstream (most NeoPixel products w/WS2812 LEDs) // NEO_KHZ400 400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers) // NEO_GRB Pixels are wired for GRB bitstream (most NeoPixel products) // NEO_RGB Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2) Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_GRB + NEO_KHZ800); void setup() { /* ----Setup the buttons as inputs and activate their internal pull-up resistor---- */ pinMode(IR_PIN,INPUT_PULLUP); //set pin as input and activate internal pull-up resistor pinMode(DOOR_PIN,INPUT_PULLUP); //set pin as input and activate internal pull-up resistor /* ---After setting up the buttons, setup debouncers---- */ debouncerA.attach(IR_PIN); debouncerA.interval(5); debouncerB.attach(DOOR_PIN); debouncerB.interval(5); strip.begin(); strip.show(); // Initialize all pixels to 'off' } void presentation() { // Send the sketch version information to the gateway and Controller sendSketchInfo("Park Sensor", "2.0"); // Register all sensors to gateway (they will be created as child devices) present(CHILD_ID, S_DOOR); // Register binary input sensor to gw } void loop() { updateSwitches(); // call function to check switches status millisNow = millis(); // get the current time if (millisNow - startMillis < activeTime){ // check to see if timeout has been reached if (doorValue == HIGH ) { // garage door is open if (irValue == LOW ) { // car is in ir beam ledChange(strip.Color(255, 0, 0)); // car is blocking ir beam,turn LEDs red } else{ ledChange(strip.Color(0, 255, 0)); // car is out of ir beam, turn LEDs green } } else{ if (marker == 1){ ledChange(strip.Color(127, 127, 127)); // door down but timer not finished. turn leds white for entry mode } } } else { // Timeout has been reached. Turn off LEDs if (marker == 1){ // check marker to only turn off if needed ledChange(strip.Color(0, 0, 0)); // turn off leds (black) marker = 0; } } } /* --------------start of functions-------------- */ /* --Update the switches status, send door state change if required -- */ void updateSwitches (){ debouncerA.update(); // IR switch debouncerB.update(); // Door switch irValue = debouncerA.read(); // get the state of the IR switch doorValue = debouncerB.read(); // get the state of the Door switch if (doorValue != oldDoorValue) { // Check if digital input has changed and send in new value if it has send(msg.set(doorValue==HIGH ? 1 : 0)); // Send in the new value if (doorValue == HIGH){ // door is open startMillis = millis(); // store start time of door opening for timeout check marker = 1; } oldDoorValue = doorValue; } } /* ----------function to change LED color------------*/ void ledChange(uint32_t c) { for(uint16_t i=0; i<strip.numPixels(); i++) { strip.setPixelColor(i, c); } strip.show(); }
