traxonja
Advanced Member level 4
Hello,
How can I transfer some data (20bytes) overa GSM telephone? I have a GPS receiver and I wanna make a GPS locator. I've done it this way: The PIC is connected to S25 Siemens and to the GPS receiver. When phone rings, PIC picks up the line, gets data from the GPS and starts sending the data (numbers) via DTMF. The problem is that gsm telephone sends DTMF tones VERY SLOW! There is no configuration of speed or anything.
So, is there a way to send data AS MODEM DATA via GSM phone??
I am using AT commands for sending DTMF tones for now.
Any idea would be great!
Oh, I also added another DTMF coder chip to send codes and it works very fast!! 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).
Thanks for reading,
Trax
How can I transfer some data (20bytes) overa GSM telephone? I have a GPS receiver and I wanna make a GPS locator. I've done it this way: The PIC is connected to S25 Siemens and to the GPS receiver. When phone rings, PIC picks up the line, gets data from the GPS and starts sending the data (numbers) via DTMF. The problem is that gsm telephone sends DTMF tones VERY SLOW! There is no configuration of speed or anything.
So, is there a way to send data AS MODEM DATA via GSM phone??
I am using AT commands for sending DTMF tones for now.
Any idea would be great!
Oh, I also added another DTMF coder chip to send codes and it works very fast!! 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).
Thanks for reading,
Trax