Hi Kishore,Please find this | Projects › Projects › Send value of variable to hyperterminal from 8051 › Hi Kishore,Please find this December 7, 2013 at 5:43 am #10705 AJISH ALFREDParticipant Hi Kishore, Please find this link; http://www.engineersgarage.com/microcontroller/8051projects/interface-serialport-RS232-AT89C51-circuit