ARM blue pill does not respond correctly

I use blue pill ARM-based board and XBee module. the module should communicate with other Xbees and according to data received, do appropriate task. the code in one MC connected to a module is as follow:

#include <XBee.h>
#include <XBeeGenDef.h>
#include <OneWire.h>
#include <DallasTemperature.h>

// Data wire is plugged into port PB1 on the Board
#define ONE_WIRE_BUS 33
#define TEMPERATURE_PRECISION 9 // Lower resolution

void flashLed(int pin, int times, int wait);
int handleMsg();

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature. 
DallasTemperature sensors(&oneWire);


// union to convery float to byte string
union u_tag {
uint8_t b[2];
float fval;
} function;

union u_tag1 {
uint8_t b[4];
float fval;
} msg;


#define  WorkingLED  PC13
#define  PushBottom  PA11
#define  StatusLED   PA15
#define  ErrorLED    PA12

uint8_t payloadRX[6] = {0};

bool msgStatus;
int count;
float temperature = 0;

XBee xbee = XBee();

XBeeAddress64 addCoord = XBeeAddress64(0X0013A200,0X40C2651F);
XBeeAddress64 addRout2 = XBeeAddress64(0X0013A200,0X40C8E51F);

ZBTxRequest zBTxReq;
ZBTxStatusResponse txStatus = ZBTxStatusResponse();
XBeeResponse response = XBeeResponse();
ZBRxResponse zBRxRes = ZBRxResponse();


void setup() 
{
// Set up pins
pinMode(PushBottom, INPUT);
pinMode(WorkingLED,OUTPUT);
pinMode(StatusLED,OUTPUT);
pinMode(ErrorLED,OUTPUT);
digitalWrite(StatusLED,LOW);

// Set up Serial ports
Serial1.begin(9600);
Serial.begin(9600);
xbee.begin(Serial1);

// Start up the library
sensors.begin(); 
flashLed(WorkingLED,3,300);
}


void loop() 
{
if (digitalRead(PushBottom) == HIGH)
{
payloadRX[0] = {'0'};
payloadRX[1] = {'1'};
zBTxReq.setPayload(payloadRX);
zBTxReq.setPayloadLength(sizeof(payloadRX));
zBTxReq.setAddress64(addRout2);
xbee.send(zBTxReq);
//flashLed(WorkingLED,1,100);

if(xbee.readPacket(1000))
{
if (xbee.getResponse().getApiId() == ZB_TX_STATUS_RESPONSE)
{
xbee.getResponse().getZBTxStatusResponse(txStatus);
if (txStatus.getDeliveryStatus() == SUCCESS)
{
flashLed(StatusLED,5,50);
} else
{
flashLed(ErrorLED,3,500);
}
}
} else if (xbee.getResponse().isError())
{
flashLed(ErrorLED, 2, 500);
} else
{
flashLed(ErrorLED, 1, 500);
}
}

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

if (xbee.getResponse().getApiId() == ZB_RX_RESPONSE)
{
flashLed(WorkingLED,5,150);
xbee.getResponse().getZBRxResponse(zBRxRes);

for (int i = 0; i < zBRxRes.getDataLength(); i++) 
{
payloadRX[i] = zBRxRes.getData()[i];
}

if (handleMsg() == FLASH_LED)
{
flashLed(WorkingLED,5,1000);
}

if (handleMsg() == READ_PIN)
{
payloadRX[0] = {'0'};
payloadRX[1] = {'2'};
if (digitalRead(PushBottom) == HIGH)
{
payloadRX[2] = {'H'};
payloadRX[3] = {'I'};
payloadRX[4] = {'G'};
payloadRX[5] = {'H'};
} else if (digitalRead(PushBottom) == LOW)
{
payloadRX[2] = {'L'};
payloadRX[3] = {'O'};
payloadRX[4] = {'W'};
}
zBTxReq.setPayload(payloadRX);
zBTxReq.setPayloadLength(sizeof(payloadRX));
zBTxReq.setAddress64(addRout2);
xbee.send(zBTxReq);
flashLed(WorkingLED,5,150);

if(xbee.readPacket(1000))
{
if (xbee.getResponse().getApiId() == ZB_TX_STATUS_RESPONSE)
{
xbee.getResponse().getZBTxStatusResponse(txStatus);
if (txStatus.getDeliveryStatus() == SUCCESS)
{
flashLed(StatusLED,5,50);
} else
{
flashLed(ErrorLED,3,500);
}
}
} else if (xbee.getResponse().isError())
{
flashLed(ErrorLED, 2, 500);
} else
{
flashLed(ErrorLED, 1, 500);
}
}

if (handleMsg() == READ_TEMPERATURE)
{
flashLed(WorkingLED, 5, 150);
//sensors.requestTemperatures();
//temperature = sensors.getTempCByIndex(0);
//Serial.print(" C  ");
//Serial.print(temperature);
payloadRX[0]='0';
payloadRX[1]='3';
//msg.fval = temperature;
/*for (int i=0;i<4;i++)
{
payloadRX[i+2]=msg.b[i];
}*/

//zBTxReq.setPayloadLength(sizeof(payloadRX));
//zBTxReq.setPayload(payloadRX);
//zBTxReq.setAddress64(zBRxRes.getRemoteAddress64());
//zBTxReq.setAddress64(addCoord);

zBTxReq = ZBTxRequest(addCoord, payloadRX, sizeof(payloadRX));

xbee.send(zBTxReq);
flashLed(WorkingLED,5,150);

if(xbee.readPacket(1000))
{
if (xbee.getResponse().getApiId() == ZB_TX_STATUS_RESPONSE)
{
xbee.getResponse().getZBTxStatusResponse(txStatus);
if (txStatus.getDeliveryStatus() == SUCCESS)
{
flashLed(StatusLED,5,50);
} else
{
flashLed(ErrorLED,3,500);
}
}
} else if (xbee.getResponse().isError())
{
flashLed(ErrorLED, 2, 500);
} else
{
flashLed(ErrorLED, 1, 500);
}
}
} else 
{
// not something we were expecting
flashLed(ErrorLED, 1, 25);    
}
}
//flashLed(WorkingLED, 1, 2000);
Serial1.flush(); 
}

int handleMsg()
{
if (payloadRX[0] == '0' && payloadRX[1] == '1')
{
return FLASH_LED;
} else if (payloadRX[0] == '0' && payloadRX[1] == '2')
{
return READ_PIN;
} else if (payloadRX[0] == '0' && payloadRX[1] == '3')
{
return READ_TEMPERATURE;
} else if (payloadRX[0] == '0' && payloadRX[1] == '4')
{
return READ_HUMIDITY;
} else if (payloadRX[0] == '0' && payloadRX[1] == '5')
{
return WRITE_PIN;
}
}

void flashLed(int pin, int times, int wait) 
{
for (int i = 0; i < times; i++) {
digitalWrite(pin, HIGH);
delay(wait);
digitalWrite(pin, LOW);
delay(wait);
}
}

The problem is when a module send a data, the code does not respond correctly. when ask flashing, it does not respond all the request, and for reading tempreature, it does not respond at all.