implementing multiple sensors

waynehead99

So I have created a multi sensor that uses the DHT and motion to get Temp/Hum/Motion. Problem I have though is the update of the hum/temp. I have not been able to figure out a way to get a reliable update on those without blasting the GW/Vera with unneeded announcements (disable sleep function and it keeps updating pretty much every second). So right now the script updates the temp/hum only when motion is seen. I have tried a few things with my limited knowledge of arduino and can't get this to work properly. Can someone please take a look at this sketch and tell me what I am missing? If i change the variables for sleep at the end and try to do an interrupt and a sleep delay, i get an error.
7-21-2014 1-05-03 PM.png

Motion_Temp_Sensor13b3.ino

waynehead99

Nobody wants to take a crack at this? I figured this to be a common combo and would really like to get it to work properly.

Bandra

I'm coming close to finalising my multisensor sketch. I'll post code once I clean it up a little. I have a newborn at home, so if I forget to put code here then somebody please remind me in a little while :)

mikeones

@waynehead99 Here is a sketch I run with DHT and motion support.

#include <Sleep_n0m1.h>
#include <SPI.h>
#include <EEPROM.h>  
#include <RF24.h>
#include <Sensor.h>  
#include <DHT.h>  

#define CHILD_ID_HUM 0
#define CHILD_ID_TEMP 1
#define HUMIDITY_SENSOR_DIGITAL_PIN 4

Sensor gw;
DHT dht;
Sleep sleep;
float lastTemp;
float lastHum;
boolean lastValue = false;
boolean metric = false;

#define DIGITAL_INPUT_SENSOR 3   // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
#define INTERRUPT DIGITAL_INPUT_SENSOR-2 // Usually the interrupt = pin -2 (on uno/nano anyway)
#define CHILD_ID 2   // Id of the sensor child

long previousMillis_T = 0;     // will store last time temp data sent
unsigned long startTime_T;
unsigned long sensorInterval = 30000; // change this to desired sensor read interval in milliseconds

void setup()  
{  
  gw.begin();

  // Send the sketch version information to the gateway and Controller
  gw.sendSketchInfo("Motion Sensor and DHT", "1.0");
  dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
  pinMode(DIGITAL_INPUT_SENSOR, INPUT);      // sets the motion sensor digital pin as input
  // Register all sensors to gw (they will be created as child devices)
  gw.sendSensorPresentation(CHILD_ID, S_MOTION);
  gw.sendSensorPresentation(CHILD_ID_HUM, S_HUM);
  gw.sendSensorPresentation(CHILD_ID_TEMP, S_TEMP);
  metric = gw.isMetricSystem();
  startTime_T = millis();
  Serial.println("Setup complete");
}

void loop()     
{     
  // Read digital motion value
  boolean tripped = digitalRead(DIGITAL_INPUT_SENSOR) == HIGH; 
  
  if (lastValue != tripped) {
	gw.sendVariable(CHILD_ID, V_TRIPPED, tripped?"1":"0");  // Send tripped value to gw
	lastValue=tripped;
	//Serial.println(tripped);
  }
 
  if (millis() - startTime_T >= sensorInterval) {
	delay(dht.getMinimumSamplingPeriod());
	float temperature = dht.getTemperature();
	if (isnan(temperature)) {
		Serial.println("Failed reading temperature from DHT");
	} else if (temperature) {
	  lastTemp = temperature;
	  if (!metric) {
		temperature = dht.toFahrenheit(temperature);
	  }
	  gw.sendVariable(CHILD_ID_TEMP, V_TEMP, temperature, 1);
		Serial.print("T: ");
		Serial.println(temperature);
	}
	
	//delay(dht.getMinimumSamplingPeriod());
	float humidity = dht.getHumidity();
	if (isnan(humidity)) {
		Serial.println("Failed reading humidity from DHT");
	} else if (humidity) {
		lastHum = humidity;
		gw.sendVariable(CHILD_ID_HUM, V_HUM, humidity, 1);
		Serial.print("H: ");
		Serial.println(humidity);
	}
	startTime_T = millis();
  }

  // Power down the radio.  Note that the radio will get powered back up
  // on the next write() call.
  delay(1000); //delay to allow serial to fully print before sleep
  
}

waynehead99

Thanks that worked... and for my understanding... looks like your not really using interrupts at all? Looking at the code makes complete sense to me, and proves I was over thinking things on mine.

Thanks again.

mikeones

The sensor is not running on battery power so I did not spend much time with the interrupt/sleep options.

Tibus

is it the same process with the new 1.4 library version?

Could you please give us a exemple here or on github to have multiple sensor type on the same arduino with the new 1.4 library?

if it's the same implementation, we could write multiple "gw.present(ID, XXXX);" and send a message for each child ID type?

Thank's very much.

Tibus

Sorry, I found the new implementation in the "DallasTemperatureSensor" Example

mountainman

Here is a version I'm currently using that makes use of interrupts so might be more suitable for a battery driven DHT/Motion multi sensor. It also includes the battery monitoring. Any feedback or improvements would be appreciated.

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

#define CHILD_ID_HUM 0
#define CHILD_ID_TEMP 1
#define CHILD_ID_MOTION 2   // Id of the sensor child

#define HUMIDITY_SENSOR_DIGITAL_PIN 4
#define DIGITAL_INPUT_SENSOR 3   // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
#define INTERRUPT DIGITAL_INPUT_SENSOR-2 // Usually the interrupt = pin -2 (on uno/nano anyway)

unsigned long SLEEP_TIME = F; // Sleep time between reports (in milliseconds)


int BATTERY_SENSE_PIN = A0;  // select the input pin for the battery sense point
int oldValue=-1;

MySensor gw;
DHT dht;
float lastTemp;
float lastHum;
boolean metric = false;

int oldBatteryPcnt = 0;
int battLoop =0;

MyMessage msgHum(CHILD_ID_HUM, V_HUM);
MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
// Initialize motion message
MyMessage msg(CHILD_ID_MOTION, V_TRIPPED);

boolean pinTriggered=0;//waitTime is number of seconds to hol in while loop
long lastDebounceTime = 0;  // the last time the output pin was toggled
long debounceDelay = 50;    // the debounce time; increase if the output flickers


void setup()
{

  // use the 1.1 V internal reference
  analogReference(INTERNAL);

  gw.begin();
  dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN);

  // Send the Sketch Version Information to the Gateway
  gw.sendSketchInfo("Motion Humidity w/ Batt", "1.0");

  // Register all sensors to gw (they will be created as child devices)
  gw.present(CHILD_ID_HUM, S_HUM);
  gw.present(CHILD_ID_TEMP, S_TEMP);
  gw.present(CHILD_ID_MOTION, S_MOTION);

  pinMode(DIGITAL_INPUT_SENSOR,INPUT);      // sets the motion sensor digital pin as input
  digitalWrite(DIGITAL_INPUT_SENSOR,HIGH);   // Activate internal pull-up

  metric = gw.getConfig().isMetric;

  check_batt();

}

void loop()
{
  if (pinTriggered)
  {
	Serial.println(millis()-lastDebounceTime);
	// Read digital motion value
	boolean value = digitalRead(DIGITAL_INPUT_SENSOR);
	// If the switch changed, due to noise or pressing
	if (value != oldValue) {
	  {
		lastDebounceTime = millis();
		// Send in the new value
		gw.send(msg.set(value==HIGH ? 1 : 0));
		battLoop++;
		oldValue = value;
		Serial.print("Mot: ");
		Serial.println(value);
	  }
	}

	pinTriggered=0;
	// }
  }
  else
  {

	delay(dht.getMinimumSamplingPeriod());

	float temperature = dht.getTemperature();
	if (isnan(temperature))
	{
	  Serial.println("Failed reading temperature from DHT");
	}
	else if (temperature != lastTemp)
	{
	  lastTemp = temperature;
	  if (!metric)
	  {
		temperature = dht.toFahrenheit(temperature);
	  }
	  gw.send(msgTemp.set(temperature, 1));
	  battLoop++;
	  Serial.print("T: ");
	  Serial.println(temperature);
	}

	float humidity = dht.getHumidity();
	if (isnan(humidity))
	{
	  Serial.println("Failed reading humidity from DHT");
	}
	else if (humidity != lastHum)
	{
	  lastHum = humidity;
	  gw.send(msgHum.set(humidity, 1));
	  battLoop++;
	  Serial.print("H: ");
	  Serial.println(humidity);
	}


	if (battLoop > 10)
	{
	  check_batt();
	  battLoop=0;
	}
  }

  // Sleep until interrupt comes in on motion sensor. Send update every two minute.
  pinTriggered = gw.sleep(INTERRUPT, CHANGE, SLEEP_TIME);
}


void check_batt()
{
  // get the battery Voltage
  int sensorValue = analogRead(BATTERY_SENSE_PIN);
  Serial.println(sensorValue);

  // 1M, 470K divider across battery and using internal ADC ref of 1.1V
  // Sense point is bypassed with 0.1 uF cap to reduce noise at that point
  // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
  // 3.44/1023 = Volts per bit = 0.003363075
  float batteryV  = sensorValue * 0.003363075;
  int batteryPcnt = sensorValue / 10;

  Serial.print("Battery Voltage: ");
  Serial.print(batteryV);
  Serial.println(" V");

  Serial.print("Battery percent: ");
  Serial.print(batteryPcnt);
  Serial.println(" %");

  if (oldBatteryPcnt != batteryPcnt) {
	// Power up radio after sleep
	gw.sendBatteryLevel(batteryPcnt);
	oldBatteryPcnt = batteryPcnt;
  }
}

waynehead99

How did you get 3 options for the sleep interrupt? Whenever I would try and add the sleep_time option it would give me compile errors.

Tibus

@mountainman
Thank you verry much, exactly what i need!

For child's id, if you have two sensor you have to change the ID in the second?

Sensor 1 :
#define CHILD_ID_HUM 0
#define CHILD_ID_TEMP 1
#define CHILD_ID_MOTION 2

Sensor 2:
#define CHILD_ID_HUM 3
#define CHILD_ID_TEMP 4
#define CHILD_ID_MOTION 5

mountainman

@waynehead99 Are you using the new 1.4 Lib?

Nuubi

@egbertje Good Question :-) It would be nice to learn from existing working sketches..

Anticimex

@waynehead99 you most likely need 1.4 Lib for the new sleep constructor. I have not used sleep on 1.3 so I do not remember what arguments you had available there.
I have also extended sleep with an additional constructor which @hek has pulled into the release branch of 1.4 that permits you to use two external interrupts with independent triggers for sleep in addition to a timeout. Great for nodes with multiple sensors that still run on battery.

egbertje

@Mountainman ;

Im trying your code and its almost what im looking for.
I have two questions about it:
1 : Is it possible that the battery info has is own child id?
2 : Why dont you implement a light sensor like an LDR?

I think that including LDR/light then you have the ideal multisensor ; light + temp/hum + motion + batt monitoring !
But for now im playing with your code and try to implement light.

codenea

@mountainman Is there any instructions on how to wire/setup the hardware to work with your code?

mountainman

@egbertje;

The battery percentage is associated with the parent Arduino Node in the vera UI.
I have some LDRs ordered from Ebay so that is the next step. I had previously used the BH1750 I2C sensor in a multi sensor with the 1.3 lib but I want to debug on its own as it seemed to be giving unexpected readings.

@codenea The instructions are pretty much from the main page although if I get a chance I try to draw it up and post some pics. My setup not very pretty yet with perf board and jumper wires. A dedicated PCB would be nice.

epierre

Hello,

Here is my combo to make a Home Monitoring solution:
https://github.com/empierre/arduino/blob/master/MQv01dgi_1_4.ino

It includes (currently on a Mega):

Barometer : BMP085
Temperature + Humidity DHT11
Particle sensor
Gas sensors MQ2 MQ6 MQ131 MQ135 TGS2600 2SH12

To be added when stabilized:

Sound level in DB

Could be added:

Light sensor
Vibration sensor
PIR

pgo

Hi guys,

this is a one node with publishing DS temperatures and listening for relay commands I finished and tested yesterday>
https://github.com/pgo-sk/mysensors/blob/master/arduino/DS_and_Relay.ino
feel free to comment/use/publish...

I combined the Dalas and Relay examples together - you have to deactivate the sleep for the relays to listen 100% of time.
MQTT identification on openHAB:
MyMQTT/20/0/V_TEMP - DS sensor(s)
MyMQTT/20/1/V_LIGHT - relay 1
MyMQTT/20/2/V_LIGHT - relay 2

If somebody is interested I can post the maps/items files for openHAB

Regards,
Pego
PS I am working on an home automation system with solar hot air panels control/solar hot water panels and all the common stuff like lights/temperatures/weather etc.. More here: https://github.com/pgo-sk/mysensors/wiki/Home-automation-using-mysensors-and-openHAB

integlikewhoa

I'm also following along interested in the Temp, Humidity, and motion sensor.

implementing multiple sensors

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