Thanks Ajish
There is no custom ciruitary i have buit
using 8051 development board
RS232 connection b/w 8051 board and sim900 board
data getting out of RS232 is perfectly fine as checked it in realterm.
now i am writing a small code to display data sent from hyperterminal on the LCD -> troubleshooting
how do u think power supply will be a problem?, 8051 and SIM900 working perfectly fine when used independently and the data sent to sim900 using 8051 and PC are exactly the same .
What do you think can be d problem?
Thanks
Sandeep