### I'm confused

Hello,
I'm a C++ newbie, I've done some small guided Arduino projects in the past and I decided to step up my game a bit, I'm working on a temperature controlled box. The set up is simple, two 5v relays and a RHT03 temperature and humidity sensor. Problem is the data sheet is pretty much useless and the example is leaving me a bit stumped.
Here's the example:
 ``123456789101112131415161718192021222324252627282930313233343536373839404142434445464748`` ``````{ byte i = 0; byte result=0; for(i=0; i< 8; i++){ //We enter this during the first start bit (low for 50uS) of the byte while(!(PINC & _BV(DHT11_PIN))); // wait until pin goes high //signalling end of start of bit's transmission. //Dataline will stay high for 27 or 70 uS, depending on if // a 0 or a 1 is being sent, respectively delayMicroseconds(30);//AFTER pin is high, wait further period, to be //into the part of the timing diagram where a 0 or a 1 denotes //the datum being send. The "further period" was 30uS in the software //that this has been created from. I believe that a higher number //(45?) would be more appropriate. if(PINC & _BV(DHT11_PIN))//If pin still high result |=(1<<(7-i));// "add" (not just addition) the 1 to the //growing byte while((PINC & _BV(DHT11_PIN))); // wait for pin to go low again, which //signals he START of the NEXT bit's transmission. }//end of "for.." return result; }//end of "read_dht11_dat()" void setup() { DDRC |= _BV(DHT11_PIN);//set data pin... for now... as out(?)put //DDRC is data direction register for pins A0-5 are on PORTC |= _BV(DHT11_PIN);//(dis?)-connect internal pull up on line //PORTC relates to the pins A0-5 are on. Serial.begin(9600); delay(300);//Let system settle Serial.println("Humidity and temperature\n\n"); delay(700);//Wait rest of 1000ms recommended delay before //accessing sensor. } void loop() { byte dht11_dat[5];//Array to hold the bytes sent from sensor. 0-4 should be enough //don't belive dht11_dat[5] is used. byte dht11_in; byte i; // Send "start read and report" command to sensor.... // 1. pull-down i/o pin for 18ms PORTC &= ~_BV(DHT11_PIN); }``````

Can someone please break this down in dummy friendly therms?
Last edited on
Ah crap I completely forgot about that reference page, thanks for the link.
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