PLIZ CHECK MY SCHEMATIC,pic16f84->max232->gsm phone

[dumato52]

Thankyou Ioannis, am going to do that
regards
dumato

[dumato52]

I have practiced simulation, now i was trying to simulate my project above but Virtual terminal is showing AT,AT, AT contineously after pressing ON the push button. What could be the problem?
regards

[Ioannis]

Well, my car is not moving... what might be the problem???

Ioannis

[dumato52]

Hullo Ioannis, probably u needed details,my code is below,am using pic16f877,
code:
DEFINE OSC 8
DEFINE HSER_TXSTA 20h
DEFINE HSER_RCSTA 90h
DEFINE HSER_BAUD 9600
DEFINE HSER_CLROERR 1

PushButton var PORTB.0

Main:

IF PushButton = 0 THEN SMS

goto main

SMS:

HSEROUT ["AT" ,13,10]

HSERIN 5000, SMS, [WAIT("OK")]

HSEROUT ["AT+CMGF=1" ,13,10]

HSERIN 5000, SMS, [WAIT("OK")]

HSEROUT ["AT+CMGS=+256782277658"]

HSEROUT [13,10]

HSERIN 5000, SMS, [WAIT(">")]

HSEROUT ["BUTTON HAS BEEN PRESSED!"]

HSEROUT [26]

HSERIN 15000, SMS, [WAIT("+CMG")]

HSEROUT [10]

end

[Ioannis]

Your AT you see, is every 5 seconds, right?

The Hserin command times out on 5000 msec because it does not receive any response, like an OK.

I will repeat my self again now telling that simulation is not a panacea...

Ioannis

[f_lez]

cant help much with code but i am currently doing very much the same with a 2550, as i found the f84/f88 to be short of code space.

the t68i will connect direct to a pic and is 5v tolerant, it works at 9600 and better at 4800, but 1200 gave best performance with 0 errors.

the t68i only works in pdu mode, but you can make the pdu stings in pduspy, and then just cut/paste them into your code for sending.

decoding is a little more tricky.... but you can cheat by reading your message in pdu and comparing it to what it should look like in pdu, you never need to use plain text, and should stop thinking of sms messages as messages and think of them as response strings, and as with all response strings, you compare them to what they should look like, its just as easy to compare 'ok' to 'ok' as it is to compare 32'65'66'67 to 32'65'66'67 as it is to ' ABC' - why waste time converting in chip, when you can convert before compile and just use the converted string.....

good luck.

and move to a bigger chip lol

/comments on his SW status, he says he has no manual, not that he's a pirate, have you never lost a manual?

and on my own point here, if he is a pirate, I'd sooner he was using PB and contributing to the group and not to some other group!


flies/bees/honey/donkeys/carrots/sticks.....

[dumato52]

Thankyou Ioannis and f Lez for your contributions, i got the point of no response from the virtual terminal, am wondering how can i make it respond, like when pic16f877 sends ''AT'' ,terminal is supposed to respond ''OK'',
Do i need to use two virtual terminals? pliz guide me
regards