i bought a sim900A moduyle for a project.i connected TX,RX pin to arduino 10,11 pin and vcc mcu to 5v,gnd gnd pin.then,also connect the main cable vcc to 5v ang gnd to gnd.when i power it with arduino,only the p0ower led is blinking.what should i do for this?
Well for a start never ever post in that category again.
I moved your topic to an appropriate forum category.
In the future, please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose. The one you posted in says not to post here.
This is an important part of responsible forum usage.
You might want to look at this How to get the best out of this forum before you proceed any further.
Thanks in advance for your cooperation.
Look at the posts at the end where other people have had problems like this. Does this help you?
which catagory should i post?
I have already moved it to an appropriate category. Look at the top of the first post to see where it is.
thanks.how can i solve the problem?
Have you read the document I posted? It seems not. I can tell you know that you haven't clicked on that link.
You have to post a lot more about your problem. We only know what you tell us, and without knowing what you have, we don't stand a chance.
So the basics are a schematic hand drawn is fine but a fritzing like or pictures linked together is not. Then we need to see the code you are trying to upload.
The third one might be helpful, it has two lessons for you.
First of all a possible solution, and second when you do not engage with people and cooperate they stop answering you. Thats how it works here.
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