MEsh network with xbee series1


I am using xbee series 1 to transmit directly the value from the sensor using pin D0=2 and transmitting to the other xbee. Now i want to make a mesh network using XB24-DM in XCTU. Kindly tell me how to confiure the multiple xbees so that a mesh network is formed and sends the reading of the sensor directly.

Thanku very mcuh