Hello good people of EEVblog Forum, and this is my first post
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Me and my class mates are working now on our graduation project , 8051 and stuff...
one of my friends decided to work with " Sin900a mini " module
now the problem : no one of us have any clue about how to make this thing work
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we looked for data sheets but nothing was found about the module (not the sim900 circuit),Prof Google and Prof Youtube were not much help either.
So did anyone ever worked with this module ?I have to know so I could ask specific questions.
any comment will be appreciated
Thank you for your replays, though this isn't exactly what I meant.
I know the process of learning how to use a new piece of hardware (study schematics , code samples , protocols...).
what I am looking for is some one who used this component, and can answer couple of basic questions .
the module I am talking about is limited have only rs232 pins(RX,TX) an power supply so I don't really looking forward to read all the data sheets.
now the problem : no one of us have any clue about how to make this thing work .
we looked for data sheets but nothing was found about the module (not the sim900 circuit),Prof Google and Prof Youtube were not much help either.
So did anyone ever worked with this module ?I have to know so I could ask specific questions.
any comment will be appreciated
Um silly question - why to choose a module for which you are unable to find any documentation? (despite there being some, as posted by others). There are other GSM modules on the market.
A good idea is to check before buying/ordering a part whether you can get documentation and the toolchain (if required), not after.
As I mentioned above it is not my part, I didn't order it ,I am simply trying to help a friend who cant speak English.
things I didn't mention we are all working on a shoe string budget , the computers we use are crap and the dev boards we are using are 1000 years obsolete.
that's why I asked about the specific "Sim900a mini",so if some one have the understanding how to operate it so I could ask him questions.
the aliexpress page is useful though didn't come up when I searched for it ,thank you.
This link shows how to test out a 900A module, however like many sites they do not always work as described.
http://www.instructables.com/id/Using-a-SIM900A-GSMGPRS-module-in-Australia/I took my 900A module, which looks virtually the same as yours and theirs, and tried it as that Indestructables link suggests. However you will see from my picture that the 0v wire is on a different pin, so do check with a meter which of those bottom two pins is actually 0v on your module.
I connected to my PC with a TTL to USB adaptor board, though you could connect to the other pins as they show via a serial connector
I also loaded the free puTTY program and ran the basic AT commands to check the communication was ok, No SIM card needed at this stage.
Well that is some useful data
, I'll make sure it will be put to good use !
and thank you on the behalf of my friend
You would get MUCH more useful information if you would just read what has been presented, apply it to your [friend's] board, and then ask specific questions when/if you run into any problems.
You've already been given links to the schematics for your exact board and the data sheet for the SIM900A module being used on it. I'm struggling to understand what else it is you think you need?