send sms via msp430 ultra low power

Hi,

the question is rather wide - do you already have a specific modem for sending sms at all? If not, look at Enfora Enabler modules as they are quite cheap and easy to use - alternatively Wismo from Sierra Wireless. Both are simple serial devices (which can do a lot more than just sending sms), use 3.3V so you can interface them straightforward to any msp430 with an uart (or using a software uart) without using level translators.

As with many modems they "speak" an AT command set which is understandable and usable by humans. I started with an Enfora Enabler for about 2 years ago and used a usb to uart bridge to connect the device to my pc and implement the protocol. When everything worked I put it on the msp430 and it worked with any major modifications.Even after switching to Wiso afterwards there where no modifications necessary.

I don't know if there is any ready to use library, but I think you propably don't need one.

Here are some links for you:

Wismo 228 Module (I used this one because it is LGA instead of 100pin connector)

http://www.sierrawireless.com/productsandservices/AirPrime/Wireless_Modules/Compact/WISMO228.aspx

An AT command set:

http://www.coster.info:81/costerit/teleges/doc/gsm822w.pdf

Enfora Enabler III

http://www.enfora.com/index.cgi?PageInfoFlash:CONTENT_ID=72

Hope that can give you some hints,

Jan

• what do you mean with 'ultra low power'?
• frequency of SMSes?
• how do you want to transmit the SMSes?  (GSM, UMTS, ...)

Sounds 'easy' to implement a (ultra) low power device which can transmit SMSes - but it isn't at least a weekend job...

Hardy

Ultra low power is my microcontroller which is msp430 EZ430-RF2500. I want to transmit the SMS by GPRS Modem. I have to do C programming to send SMS from PC to Hand phone using GPRS Modem and AT Commands.  I have tried AT commands on HyperTerminal to send SMS from PC to Hp. It can send and receive SMS, but now I not sure how to do in C programming the AT commands to send SMS from Computer to Handphone ?

• use an USCI from the MSP430 for serial communication
• physically you perhaps need some interface logic (MAX232?) to shift voltage levels from 3V to RS232 (depends on your Hp interface)
• write some routines for (serial) AT command transmission and reception
• send the proper AT commands to the handphone

Hardy

The GPRS Modem that i am using is iTegno GPRS Modem .  How msp430(EZ430-RF2500) interfaces with Computer to send SMS to Handphone? Pls guide me step by step. Firstly i need to know whether it needs any connection between msp430 to GPRS modem? But my GPRS Modem is fully covered and i hope there will no need for any connesction needed since  msp430 is wireless. Is there any sample code to use as reference to write my code to send SMS from PC to Handphone using GPRS Modem and AT Commands? Pls help me as soon as possible. Thank You.