pls help me w/ my program....

[master_olan]

Well I programmed a PIC16f877a to a GSM modem for a friend some months ago... I also had problems with receiving data from Modem to PIC and added a buffer (74LS125)... It worked after that... also try changing this:
DEFINE HSER_TXSTA 20h
to this:
DEFINE HSER_TXSTA 24h
the manual says 24h works with high speed baud rates.. It's what I did with mine...

[blufips]

Hellow master_olan thanks again for your help and reply... sorry for my noob question but where i should put the buffer... sorry im just a beginer in making circuits... it would be a great help if you can post a schematic diagram of your MUC with buffer... and thanks a lot

[master_olan]

Well... just connect GSM Mod. TX to input of buffer then output of buffer to RX of PIC... Just like this...

If that doesn't work i suggest you spy in your system by using the PCs hyperterminal.. That way you will know if the Module or the PIC does respond to the commands...

I hope any of these will help you...

[blufips]

hi master_olan
I Did all the things you said but it did not work... i also check it in pc but still the reply did not work... any suggestion or solution? thank you for your help and effort