View source for Temperature control air conditioning

{{Language| Temperature Control Type Air-conditioner}}
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==Objective==
To control air conditioner by detecting environment temperature. When temperature increases to a certain value, the air conditioner will start. On the contrary, the air conditioner will close when the outside temperature decreases to a certain value. 

==Principle==
Use temperature and humidity sensor AM2321 to detect indoor temperature and then control the air conditioner by matching codes with infrared transmission sensor. 

==Equipment==
{|class="wikitable"
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|Module||Number||Function
|-
|[[Microduino-CoreUSB]]||1||Core board 
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|[[Microduino-Sensorhub]]||1||Sensor pin board
|-
| [[Microduino-Temp&Hum]]||1||Temperature and humidity sensor 
|-
| [[Microduino-IR transmitter]]||1||Infrared transmission sensor 
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| [[Microduino-Converter]]||1|| Pin board 
|}
 [[File:_temp_air.jpg|600px|center|thumb]]

==Hardware Buildup==
*Setup 1: Stack CoreUSB and Sensorhub. 
[[File:CoreUSB_Ble_Sensorhub.jpg|600px|center|thumb]]
*Setup 2：Connect Microduino-IR transmitter via pin board to D3 pin of Sensorhub and Microduino-Temp&Hum to IIC pin of Sensorhub. 
[[file:Microduino-sensorhub_rule.JPG|thumb|800px|center]]
[[File:temp_ir_sensor.jpg|600px|center|thumb]]

==Software Debugging==
*Air conditioner infrared remote control encoding definition. Here the conditioner adopts NEC encoding format.
<source lang="cpp">
IRsend irsend;       //Infrared transmission 
AM2321 am2321;       //Temperature and humidity sensor AM2321 

#define POWER_ON 0xC1602680    //Air conditioner power on/off encoding 
float temp = 0;        //Temperature value 
unsigned long runTime = 0;   //Air conditioner power on/off time 


</source>

*Detect the current temperature value every second. When the temperature is above 30℃, the air conditioner opens and when it is below 25℃, the air conditioner closes. The time interval between opening and closing is 180s for fear of frequent operation.  
<source lang="cpp">
am2321.read();           //Acquire the current temperature value 
temp = am2321.temperature/10.0;
if(millis()>runTime+180000)    //Above 180s time interval
{
  if(temp > 30)         //Higher than 30℃ and the air conditioner opens. 

  {
    irsend.sendNEC(0xC1602680,32);
    irsend.sendCode(0x00000000,16);
    runTime = millis();
  }
  else if(temp <25)     //Lower than 30℃ and the air conditioner closes.
  {
    irsend.sendNEC(0xC1602680,32);
    irsend.sendCode(0x00000000,16);
    runTime = millis();    
   }
 }
 delay(1000); 

</source>

==Program==
[[https://github.com/Microduino/Microduino_Tutorials/tree/master/MCookie_Tutorial/MicroduinoAirConditioner MicroduinoAirConditioner]]

==Result==
When the temperature is above 30℃, the air conditioner opens and when it is below 25℃, the air conditioner closes. By detecting temperature value to control other functions of the air conditioner. 

==Video==

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