Pic to GSM Phone connection (HSerin problems)

[Ioannis]

I don't think that 6230 was on the market at the time NavMicro refered to 62xx. I think he meant 6210 like phones.

Anyway USB and RS232 are not interchangable! Not the D+ D- relate to Tx and Rx of the RS232 signals!

You have to use a USB converter to RS232 or better use a phone of the older types that had RS232 interface. If want to make a commercial product I suggest one of the modules like Wavecom or Telit. Ericson is out of the modules market now.

Ioannis

[Josuetas]

Well But nokia 6210 isn´t available around here (its way too old) and GSM modules exceed the final cost of my possible product, so they are no good options. What about nokia 3220 it is serial for sure since the cable has an USB-RS232 converter in built and it is available, i haven´t been able to send AT commands to it though. I was able to Send AT commands to the 6230 but i suppose it is made throught the Windows Driver. How .... :| ?.... mmm

I am sure that nokia phones are way to different now than they were on this 6210 models, How is the modem activated now? it can´t be too hard since you can simply open HyperTerminal and send AT (is what i heard, i succeded in 6230)

Thanks for your replies.

[Ioannis]

What do you mean by "how is the modem activated now?"

It is always On! If you call the mobile from another computer with a dialup modem through terminal and have your mobile also connected to a PC with a terminal running, then after the first communication of the modems they are transparent. What you type from one terminal window, appears on the other.

Of course you must have payed for the data service to your mobile provider first!

Ioannis

[Josuetas]

In GSM phones like A55 you can´t use AT modem if you are in HandsFree mode, did you knew that? and from http://www.atrox.at/datacable/dlr3/index.html you have to use some pulldown resistors or the 6210 will not answer correctly (it says so). You cant communicate with FBUS unless you send U like 60 times to sync with the phone.
I have tried several phones from nokia which claim to have Data Modem in built, connected them to HyperTerminal and none works(just the ones with USB in Pop-port), have you ever tried one aside of the old 6210?

What do i mean with "how do you turn it on"? well ... How do you?.

I am looking for someone who actually had connected a new model, like 3220 or..... well i don´t now.... Any model. I personally have done it with Siemmens phones, they do are pretty strightfordward.

[Ioannis]

I have tried 6210, 6310, 6310i, Wavecom Fastrack, Telit and long time ago the Falcon mobile modem. All work simply by connecting them. Plug and Play sort of speak. After you type ati3 they respond with their name!

Ioannis

[pukx]

@bitmaniac, i would like to ask if i'm goin' to build the dlr3 can i use max232C in substitute for max3232? 'coz it's very hard to find those parts here... rgrds, pukx

[bitmaniac]

@pukx
I don't think you will have any problem using C version If I remember right it has to do with the operation temperature rating...