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  • Author Author: sakthi.1260
  • Date Created: Date Created
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Bluetooth Unleashed : AAPSAD #7 : Moisture Matters

sakthi.1260

Hello guys,

 

Most of the work with Rpi is over, the next part is to prepare the control unit.

This week we gonna break open a USB humidifier and try to control it using the arduino.

Does humidity affects emotions?

Even I had the question till this was started, and after little search found a lot of interesting facts over this, so the conclusion they do play a vital role over the mood, higher humidity makes you lazy, that's something you might want when you are angry.

imageimage

 

I opened it, there is small control board and a pair of wire connected to the piezo. I removed the board to inspect and found the IC marking to be erased.

image

Since its was ON OFF controller decided to do it in another way, permanently shorted the humidifier switch to ground and attached a NPN to the power supply

image

 

and as final touch sprayed a layer of conformal coating ()

image

 

The Bluetooth is yet to be unleashes so I'm gonna send data over the arduino serial monitor

Its already humid weather here, so the only test case possible was 'anger' (did a mistake over the case in the snippet), but still it works. I don't want the humidifier to be turned ON based on the Relative humidity so hooked up a DHT11 to the arduino.

 

The code

#include <TroykaDHT.h>
DHT dht(10, DHT11);
void setup()
{
  pinMode(9, OUTPUT);
  Serial.begin(9600);
  dht.begin();
}

void loop()
{ digitalWrite(9,LOW);
  dht.read();
  delay(1000);
  int hum = dht.getHumidity();
  char c = Serial.read();
  switch(c)
  {
  case 'a': //anger
  if (hum<80)
  Serial.println(hum);
  digitalWrite(9,HIGH);
  delay(10000);
  break;
  case 's': //sad
  if (hum<60)
  Serial.println(hum);
  digitalWrite(9,HIGH); 
  delay(10000);
  break;
}
}

imageimage

 

I started to visualize the final outcome, hoping for a great end.

Cheers,

Parents

  • Nice update on your design challenge project.  It was not too clear to me the relationship between humidity and mood, does an increase in humidity improve your mood?  I am only wondering as here in Texas we are moving into the high heat and humidity season and I feel as if my mood is worsening.

    Good luck on your continued to progress in finishing up your project.

    Gene

Comment

  • Nice update on your design challenge project.  It was not too clear to me the relationship between humidity and mood, does an increase in humidity improve your mood?  I am only wondering as here in Texas we are moving into the high heat and humidity season and I feel as if my mood is worsening.

    Good luck on your continued to progress in finishing up your project.

    Gene

Children
  • in reply to genebren

    Hi Gene,

    Thanks.

    The humidity indirectly affects psychology, a higher humidity means a less perspiration which in turns give a lethargic feel if you are angry a humidity raise should somewhat bring your energy levels down, an optimum of 40-60% RH is perfect for good mood. A lot of research papers on the weather and psychology are there which goes much deeper, I just went through a few and came to a conclusion.

     

    Cheers,