PDA

View Full Version : gsm module and propeller chip-how to make them work together



Akash1415
07-07-2009, 09:06 PM
How can we program a telit gsm module to send a text to the propeller chip and receive the text as a code so the propeller chip turns on?

What are some steps we can take in order for the gsm module to work efficiently with the propeller chip?

Mike Green
07-07-2009, 09:43 PM
You will have to read and understand the Telit documentation. Most of your questions have nothing to do with the Propeller.

Normally, the Telit module talks to a microcontroller like the Propeller using ordinary asynchronous serial I/O. The voltage levels used are unusual in that they're based on a 2.8V power supply. Fortunately, the Propeller's voltage levels are close enough that they can be directly connected together. For protection from programming errors (like using the wrong I/O pin number in your program), I'd suggest using a 330 Ohm resistor between any Propeller I/O pin and a Telit I/O pin.

There are a variety of I/O drivers for the Propeller that will provide asynchronous serial I/O. There's also a GPS message parser. Browse through the Object Exchange (obex.parallax.com/ (http://obex.parallax.com/)) for these.