Sending SMS text via a GSM Modem and a PIC16F877A microcontroller.

[nbrady]

Hi Folks,

Hope someone can provide some advice on where to start with this project I am working on. I need to use the PIC16F877A microcontroller to detect certain conditions (this part is easy) and when the correct conditions are met i need to send some basic information via a SMS text message to the owner or a few numbers. I want to use the simplest method possible to just send basic text data. I have looked at alot of GSM modems on the web and they all appear to come in large (approx 4"x4") units and are cost approx €150 e.g (**broken link removed**).

Any simple microcontroller to mobile phone communication method you can suggest would be appreciated and low cost too if possible. tnx..

 

[edeca]

Something like SparkFun Electronics - GSM/GPRS Module - SM5100B is much cheaper (there are others on that site also).

An old mobile phone would also work, something like a Siemens or Nokia that has a serial interface. You could pick one up off of ebay, the communications protocols are documented on the internet for a number of these.

You would have to charge the battery in a phone, so I'd recommend a module.

 

[nbrady]

thank you, I actually spotted this after I posted. Are you aware of any sites that will give you full c programs to run on PIC developer boards to interface with the gsm modem. From searching the web there are lots of bits of code everywhere with related problems too. I woudl like to get a clean program that I can run and prove it works and then customize it for what I need to do. Maybe this is asking too much!! tnx.