circuit is here.
Hi! I would suggest to select the Mobile terminal device of your choice first and study the specs and AT commands that accompany it. Most of the AT commands are common but each terminal might have its own special ones.
Also I would strongly recommend to use the UART module of the PIC's and also use bidirectional communication to check that the device has replied with OK after succesful command.
For example:
send AT+cr+lf
device replies OK+cr+lf
After you establish a good command of the device you are going to use then trie to send SMS. It is a difficult task for the begginer.
Ioannis
Do yuo know sample temparature and humidity sms send circuit.
Could you write sample address.
I know this address: http://www.wrankl.de/SMST4PIC/SMST4PIC.html
I maked this circuit,but complate not run.Don't sms.
Thank you.Regards.
Last edited by elektoro2009; - 18th April 2008 at 00:48.
Hi! Please read my post again. What you are trying to do is a complicated project. Not for the novice. If you insist on doing it, then do it with small steps, one task at a time.
1. Select your mobile device. READ CAREFULLY the Data Sheet and get acquainted with it.
2. Use only the USART of your PIC (you need of course level translation like a MAX232).
3. Try to communicate with your mobile device with simple commands like AT and wait for the answer OK.
4. Then try more complicated tasks like sending SMS.
Also note that some commands like deleting SMS might take some time until they respond with OK. Not all commands execute immediatly!
Ioannis
It is a good idea if he has not blink a LED up to this moment, but I did not meant so small steps!
On the other hand, a good schematic, a BOM and the full program, debuged, is most welcome.
Ioannis
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