Microcontrollers & Embedded System Designs

I meant here

In first frame ,send a get version frame

with sequence number as 40hex and not 60 hex
(all checksums are for sequence no=60hex)

for 40hex,wont the checksum be different?

equally for 41hex and so on...

E.g: In above example if we were to send the same Get version frame 9 times in a row, what should be done? You are absolutely correct! In the first frame, Seq.No.. is 0x60, next its 0x61,next 0x62……0x67 (and back to..) 0x60. That’s all. The phone will be having a count of the source’s (micro) Seq.No.’s, and if it’s incorrect, then phone will not respond. And you will have to re-initiate the whole ‘U’ sending again.

from http://www.ucdevelopers.page.tl/Understanding-the-Protocol.htm

Hi Abicash,
I can't get what you mean by frames,
is that; if in the 1st frame if i want to get the version no of mobile, the sequence no is 60 & and when we send a frame for sending an SMS it should be 61 and for receiving 62, etc...
is that the way you say?

And one more thing Abicash why mobile is replying more than once for a single frame sent?

And I would like to know how to send an SMS?
i tried for deleting the SMS i got it sucessfully...
I am not clear about sending an SMS?

And one more thing Abicash, when we go for real time implementation how can we capture this serial datas through the code we write?`

Please clear my doubts.....
Thankyou

"I can't get what you mean by frames,"

Frames means starting with 1E and ending with odd checksum
(all 16 bytes make 1 frame)
everything u send to mobile should have a count of the seq nos.

i.e. if u send a get-version frame with 60hex as seq no
,the next same frame(get-version) should have 61hex
as seq no and so on..upto 67hex after which it is 60 hex again

now if u were to send 3 frames
1)getversion,seq no is 60hex
2)delete sms,seq no is 61hex
3)again(say) getversion,62hex

so u see ,the seq no is incrementing for every frame sent!

and for replies of moblie(it sends data 3 times)


Chakra,I will advice to to go thru the pages of tutorial
.I think I have xplained the things in quite easy steps
and we r discussing the same things here


"And one more thing Abicash, when we go for real time implementation how can we capture this serial datas through the code we write?"

what do u mean by the above statement?

Hi Abicash,
I am very clear now, Thanks for your explanation....
I will go through the tutorial completely again...

"And one more thing Abicash, when we go for real time implementation how can we capture this serial datas through the code we write?"

I mean; when i develop the application PC is not going to come in to picture right... so i will be interfacing this mobile with a microcontroller.
Here i have to write a source code to send this frames to the controller and receive some frames by the controller. so i am asking about the source code implementation... Since i am not much familiar with this...

Also i want to know is there any possibilities to read an already received SMS?

Also i would like to know the frame structure for sending an SMS to some other phones?

Sorry for putting you more questions Abicash....
Please help me...
Thankyou.