help with sms software

[dreamdelerium]

hi everyone. if im of topic, im sorry. i dont know where else to post. im looking for assistance developing software for a wireless usb modem (Huawei model e220 hsdpa usb modem. this modem is provided by a local-in botswana africa-cell phone company. the modem uses a sim chip). i would like to create a program that will use the modem to send out sms's. i know it can be done, as the software the modem comes with, does. i just dont know where to start. ive tried to use the gsmcomm but it doesnt appear to work. does anyone know what add on's i need to use? ive never worked with com ports before and am looking for any assistance. is there something i need to request from the manufacturer (like an sdk?). if so, they seem less then helpfull so far. or do i need an sdk for hsdpa (if so, i cant find anything on the net). any insight would be greatly appreciated. thanks jason

 

[cjard]

asking us probably isnt the best place but i'm not sure what is; the manufacturer of the modem may help, however, you will probably find that the modem sends SMS via simple AT commands. Using a serial port sniffer such as is available from Sysinternals (for free) you can watch the traffic that the supplied software sends and work out what commands you would send to make the modem go.

As noted, it might obey a known format, such as is used by Sony and Nokia for sending SMS via a datacable.. I dont know if it's proprietary in some cases but you can find help on AT commands like this:
http://www.google.co.uk/search?hl=en&q=modem+at+command+send+sms&meta=

 

[dreamdelerium]

follow up

thanks for the pointers. how about something more basic. i imagine i will also need to know how to connect to the usb port, query it, etc. how would i do that in vb.net. or is this something thats specific to the modem manufacturer. thanks for your help

 

[cjard]

i'd google for vb.net serial port

usb devices like this usually establish a pseudo COM port

 

[dreamdelerium]

lol, ok

lol, ok. im new to all this. so, how do i use, access psuedo com ports?