Sleep mode GSM module, Quectel M95 or Simcom SIM900 ?

Projects Networking, Protocols, and Devices
1

Hi everyone,
I've read lots of threads talking about GSM modules but, up to now, I haven't found anything interesting concerning the sleep mode.

I need a GSM module that can wake up on external signal (i.e. from Arduino) or when it receives an sms.
Which modem do you suggest?
Thank you

2

Most GSM devices support software power control. Just make sure that any shield you fancy implements it.

3

Thank you for the answer,
I was looking for something like this SIM800L http://www.ebay.it/itm/SIM800L-Quadband-GPRS-GSM-Module-with-SIM-and-Antenna-Arduino-compatible-/171994039879?hash=item280ba4c647:g:q~AAAOSwbdpWXFUs

I hope this one works for my purpose

4

Hmm, it doesn't give much information about which pins are broken out.

The other thing that concerns me is the apparent lack of voltage regulation. The SIM800L is NOT a 5 volt device, recommended supply is 3.4 - 4.4 volts.

5

Yes, sorry, I didn't notice the lack of voltage regulator.
I think I'll buy this one. Standard 5V input, and it seems to handle sleep mode

http://www.ebay.it/itm/SIM900-GPRS-GSM-Shield-Development-Board-Quad-Band-Module-For-Arduino-/161870246831?hash=item25b037f3af:g:y0UAAOSw5ZBWLg8A

6

That looks a far better choice!