Yes it is. I have used a Twido to do it. There is an application note on how to do it available from Schneider (I have attached a copy of the application note I found on the web, I think there is a more up to date version available)
Hey Mutt can u pls send me the program on mail [email protected] and have u done the same thing on schneider M340 series .
I have also send SMS through M340 .
I try for a long time to connect twido - to a GSM modem like wavecom. your PDF in the top of the topic is great but i still can not be able to write a program on twido to send and receive sms. i will be grateful if there is any Help.