Smart Thermostat Arduino - part XBee receive

smarttherm_part_xbee_receive.ino

...
XBeeResponse response = XBeeResponse();
ZBRxResponse rx = ZBRxResponse();
...
//variables for receiving xbee
int mesAvailable = 0;
char chour[3];
char cminute[3];
char cboiler[2];
char crtemp[5];
char cvchecksum[5];
int vhour = 0;
int vminute =0;
int vminuteold =0;
int rvboiler = 0;
int rvtemp = 0;
int rvchecksum=0;

//timer to check if raspberry pi is still sending messages to arduino
int remotemode = 0;
int remotemodeold = 0;
unsigned int rcycle = 3000;
unsigned int maxrcycle = 2000;
...

void loop() {
...

 //reading xbee message
   xbee.readPacket();

   if (xbee.getResponse().isAvailable()) {

      if (xbee.getResponse().getApiId() == ZB_RX_RESPONSE) {
        // got a zb rx packet

        // now fill our zb rx class
        xbee.getResponse().getZBRxResponse(rx);

        //convert xbee message to seperate integer values <hour><minute><boiler state><act temperature><checksum>
         chour[0] = rx.getData()[0]; //hour
         chour[1] = rx.getData()[1];
         chour[2] = 0; //0 is used to end array
         vhour = atoi(&chour[0]); //only first position of array is needed to confert string array to int
         cminute[0] = rx.getData()[2]; //minute
         cminute[1] = rx.getData()[3];
         cminute[2] = 0;  //0 is used to end array
         vminute = atoi(&cminute[0]); //only first position of array is needed to confert string array to int
         cboiler[0] = rx.getData()[4]; //boiler state 1 or 0
         cboiler[1] = 0;  //0 is used to end array
         rvboiler = atoi(&cboiler[0]); //only first position of array is needed to confert string array to int
         crtemp[0] = rx.getData()[5]; //actual temperature
         crtemp[1] = rx.getData()[6];
         crtemp[2] = rx.getData()[7];
         crtemp[3] = rx.getData()[8];
         crtemp[4] = 0;  //0 is used to end array
         rvtemp = atoi(&crtemp[0]); //only first position of array is needed to confert string array to int
         cvchecksum[0] = rx.getData()[9]; //checksum
         cvchecksum[1] = rx.getData()[10];
         cvchecksum[2] = rx.getData()[11];
         cvchecksum[3] = rx.getData()[12];
         cvchecksum[4] = 0;  //0 is used to end array
         rvchecksum = atoi(&cvchecksum[0]); //only first position of array is needed to confert string array to int

         mesAvailable = 1; 

      }
    } 

   //check if correct message is avaliable
   if (mesAvailable == 1 && (vhour+vminute+rvboiler+rvtemp) == rvchecksum ){
      rcycle = 0;
      mesAvailable = 0;
   } else {
     rcycle = rcycle+1;
     mesAvailable = 0;
   }

   //when larger than 3000 reset tot 3000 to prevent int overflow
   if (rcycle > 3000) {
     rcycle = 3000;
   }

  //check if thermostat should be in local or remote mode
   if (rcycle < maxrcycle) {
     remotemode = 1;
   } else {
     remotemode = 0;
   }

  if (remotemode == 1) {   //if remote mode is true
     avgTemp = rvtemp; //set main actual temperature to the actual temperature send by the raspberry pi
   }
...
}