XBee, Arduino and ADXL335 Data Transmission Problem

Hello everyone,

I would like to read accelerometer data with the sampling rate of more than 50Hz and transmit readings to the host computer via XBee to XBee communication.

I’m using

  1. Arudino UNO
  2. ADXL 335 3-axis accelerometer (50Hz sampling rate)
  3. XBee Series 2 modules

As shown in the following code, I am sending every readings on arduino to the host PC via xbee (sampling rate 50Hz, when I trace number of reading per seconds on arduino, it also showed around 50) . But, on the receiving side, it gets only around 37 packets per second. When I change the Baud Rate of XBee and serial port to higher values (38400, 57600,115200), more packets are received within a second but packet transmission becomes unstable and stops at some points.

Can anybody help me solve this issue? Is it due to delay of XBee packet transmission?


ADXL335,Arduino and XBee.


XBee xbee = XBee();
// these constants describe the pins. They won't change:
const int xpin = A3;                  // x-axis of the accelerometer
const int ypin = A2;                  // y-axis
const int zpin = A1;  
int ADCx,ADCy,ADCz;// 
// SH + SL Address of receiving XBee
XBeeAddress64 addr64 = XBeeAddress64(0x0013a200, 0x40a097f2);//Change address of computing node
uint8_t payload[7];
int pcount=0;
long previous,current;
int delt;

void setup()
  // initialize the serial communications:


void loop()
    ADCx = analogRead(xpin);
    ADCy = analogRead(ypin);
    ADCz = analogRead(zpin);
  payload[0] = ADCx >> 8 & 0xff; // payload[0] = MSB.
  payload[1] = ADCx & 0xff; // 0xff = 1111 1111, i.e. cuts of the MSB from pin5 and all is left is the LSB
  payload[2] = ADCy >> 8 & 0xff; // payload[0] = MSB.
  payload[3] = ADCy & 0xff; 
  payload[4] = ADCz >> 8 & 0xff; // payload[0] = MSB.
  payload[5] = ADCz & 0xff; 
  ZBTxRequest zbTx = ZBTxRequest(addr64, payload, sizeof(payload));


You are exceeding the streaming limit of the XBee ZB modules. The Streaming limit on that product under ideal circumstances with one hop is 30kbps. Try using the XBee 802.15.4 modules instead.