The cost of one SMS is dependent on before GSM network provider and starts with some cents per SMS.
If you where wondering how the PIC software works you can see that in the code. GPS device on 2400 bauds, and than Phone have to re-switch asembler routine for serial comm. I am not happy with this because it light slow. If you are interested Gps Gsm Phone current projects with this collar type: choose Tracking projects at the button navigation bar, or visit this site: Projects.
The problem there is that audio quality of gsm network is very BAD so on the other side I cannot decode the tones sent from the Gps (gsm). I've done it this spell The PIC is connected to S25 Siemens and to the GPS receiver. Anyways, when the phone rings, PIC picks up the line Phone Gsm Gps ATA.
The solution, Gsm believe is to use GPRS. Oh, I also answer another DTMF coder chip to send codes and it works very fast! This service is available air the following GSM networks: 900 MHz and 1800 MHz, e.
This is the less cost intensive option, but the customer will get the data not until the seventh GPS fix. Maybe you can try to generate tones PIC itself? So enable calls from and other countries. But for small ammount of SMS is the faster sollution since you are worried about speed.
The hyperterminal session you described made my day I will take all suggestions in consideration. When no GSM coverage is available, the GPS fix data will be retransmitted time when GSM coverage is available.
- Code: 0 Auto selection of baud rate 2400bps V.
- So, if you call it from the hyperterminal you would get data because your computer modem will decode those DTMF tones and you will be happy.
- I will try that with a hyperterminal and GSMs, if that works I'll be veeeeery happy Thanks man!
- The UHF download can be additionaly provided with a option and different accessories.
- There is no configuration of or anything.
I don't know if your supports these modes. I would have to check if the GSM has enough pre-paid credit so send the SMS. Don't forget to close the connection - You can test in this way. Is investigation site GSM covered? So could be unexpected delays for few minutes.
- But it is not guarrantied when Service Center will send SMS to destination.
- SMS is possible but if you to follow the car it could be quite expensive.
- DATA via SMS, which a very nice idea.
- Remote GPS-data transmission via UHF radio link The transmission of the data are a transceiver (transmitter 0 - 500 mW factory settings).
I using AT commands for sending DTMF tones for now. The collar can be additionaly provided with UHF download option and different accessories. I get data (it's position) it will be the position where it was a minute ago! I stopped was that data I receive from the device is VERY SLOW. And, exists in the market a variety GSM modem that use this channel.
Actual modem is located on MSC switch side modem pool.
I will as soon as I get some time to continue on that project. So if you are planning to have real time information exchange this must be into account.
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