serial communication with cell phone
jeffwhiteman
Posts: 3
First let me introduce myself. My name is Jeff and I am new to the microcontroller world. I work for myself doing sales, installation,and service of automotive electronics.(unfortunately business is slow at the moment) I have an associates degree in EE. (12+ years ago)and have forgotten most of what I learned. I think I retained just enough to be considered dangerous! I have done a ton of reading on this site (you guys are great!) as well as various other sites in the internet abyss. My first (and only) project was to integrate a prepaid cell phone with a BS2. I was able to successfully construct a circuit to decode the DTMF from a call to lock, unlock, and start my vehicle. I was initially very pleased with myself.....naturally as you all know.......its never enough! What I would like to do now is connect the prepaid phone to the stamp and use SMS instead DTMF. This will allow for confirmation messages as well as GPS tracking (to come later). I know the GSM module is probably the way to go but they are much more expensive (only 10.00 for prepaid motorola phone) I have already figured out the AT commands and successfully controlled the phone using a usb cable to my pc and hyperterminal. If I havent lost you yet with my long winded paragragh, heres my question. Is it possible to connect the usb cable from my motorola w175 phone to the bs2? if so how? will it need drivers? This may seem like a dumb question but I am confused. Thanks for any help you can offer.
Jeff
Jeff
Comments
The phone is a USB slave device and the BS2 is also a USB slave device (if you've got a USB to serial adapter). Two slave devices cannot communicate with each other.
It might be possible to use the Parallax USB Memory Stick Datalogger as a USB host for the BS2 to talk to the Motorola phone. It depends on how the phone is set up. The Datalogger uses a Vinculum chip from FTDI and this can talk to FTDI's USB to serial adapter chips. You may be able to use it to talk to the phone via a virtual serial link, but there are no guarantees and there's very little documentation or experience in doing this.