Search for GSM Modem module to exchange with PICAXE

[tparvais]

Hello,

I'd like to know if there is somebody who has some experience with PICAXE to transmit/receive data (telemtry) via SMS and GSM Machine-to-Machine Modem ?

What is the best cheapest module ? Schema ? Code ? Pricing ?

Thank you for your advices

Thomas

 

[hippy]

I've done it with PC's and there has been previous discussion on SMS using a PICAXE. Blind sending is fairly easy if one doesn't care about errors, but full SMS/GSM/Modem control really requires handling responses ( including unsolicited ones ) so an X1 PICAXE is likely best, or multiple other PICAXE's.

The cheapest solution is probably to use two mobile phones and modified data link cables. You might need the phones on a 'data contract' to do direct modem-to-modem comms but SMS should be possible from most phones.

 

[Fletch]

As I said in the other post Motorola does a set of modules that have a standard serial port and that look like a Hayes modem. I have actually used these (though not with a PICAXE) and getting SMS working was fairly easy (a formated command string.)

All SMS transmissions are "blind" the protocol they use only shows delivery to your local SMSC after that your SMSC will make the best attempt it can to deliver the message. The application I worked with included sequence numbers in the message to identify if one got lost since there was no other way to ensure delivery.

http://www.avnet.co.za/New_Products/Motorola/GSM/g18/g18_GSM_Module.htm

http://www.avnet.co.za/New_Products/Motorola/GSM/g20/g20_Module.htm

http://www.motorola.com/mot/doc/0/957_MotDoc.pdf

 

[tparvais]

Thanks, I'll look at that

 

[hippy]

All SMS transmissions are "blind" the protocol they use only shows delivery to your local SMSC after that your SMSC will make the best attempt it can to deliver the message.

In that respect, absolutely correct, and there's no guarantee the SMS will be passed on to the intended recipient.

I was meaning "blind" in the sense that there's no way of checking the module even sent the SMS out, due to lack of signal or some other problem with the message itself.

 

[Fletch]

In that respect, absolutely correct, and there's no guarantee the SMS will be passed on to the intended recipient.

I was meaning "blind" in the sense that there's no way of checking the module even sent the SMS out, due to lack of signal or some other problem with the message itself.

These modules provide error messages for interworking proceedural errors (see page 36 in the linked manual.) The reason we used them was that they were designed for embedded telemetry applications and so had a lot more functionality than you would see in a cabled handset. Useful error messages are essential for embedded applications because there isnt a human there to respond to the error.

 

[andrew_qld]

I just bought an assembled GPS board from ebay, only cost about $67 AUD / $60 US including postage (from china). Came with USB adaptor, 5V power supply, active antenna & PC software. It measures about 5cm / 2" square. Has an DB9 RS232 port, standard NMEA 4800 baud out, 5VDC. Haven't hooked it upto a picaxe yet, but will be doing that soon. The seller had them here http://cgi.ebay.com.au/High-Quality-GPS-module-demo-board-RS232-interface_W0QQitemZ230185694247QQihZ013QQcategoryZ4661QQcmdZViewItem

 

[Tom2000]

Thanks for the pointer. That's a very interesting board at a good price.

FWIW, I've purchased from Sure Electronics on eBay a number of times, and have always received good service and components as advertised. They're good folks.

Tom

 

[andrew_qld]

I also bought two RGB 3 x 1 watt luxeon LED's and they even threw in two 3W blue luxeons on driver boards as gifts!

The GPS works well on the PC, serial looks OK too, just have to find time to hook it up to a picaxe.

Andrew

 

[tparvais]

Gps ? Gsm ?

I just bought an assembled GPS board from ebay, only cost about $67 AUD / $60 US including postage (from china). Came with USB adaptor, 5V power supply, active antenna & PC software. It measures about 5cm / 2" square. Has an DB9 RS232 port, standard NMEA 4800 baud out, 5VDC. Haven't hooked it upto a picaxe yet, but will be doing that soon. The seller had them here http://cgi.ebay.com.au/High-Quality-GPS-module-demo-board-RS232-interface_W0QQitemZ230185694247QQihZ013QQcategoryZ4661QQcmdZViewItem

Thank you for this interesting URL. But this is for a GPS and not a GSM

I've also ordered componants from this Ebay store. Very good prices !

Thomas

 

[andrew_qld]

Thank you for this interesting URL. But this is for a GPS and not a GSM

Yes, Ill have to stop reading forums at midnight when I am tired

I am 2000km away from home working and only just realized my mistake when I looked at the forum today.