Hi guys, after lots of researching i found out about the SIM800L module.
I have iot sim cards that have a software over which i can see all sms received by them. But ofc to receive any SMS i need to have them hooked up to power and an antenna. If i would build a setup (similar to these SMS modems on aliexpress) with only power supply hooked up directly to th SIM800L and an external Antenna hooked up to it, would i be able to power the sims and receive SMS? Is it possible to scale this and have for example 20+ sims running in a single setup? Or is arduino always needed to perform anything with the SIM800L?
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A link to the datasheet of those sims is the first request.
Assuming you are talking about a standard SIM800 shield for Arduino - yes.
So just connecting it with an antenna and power supply wouldn’t be enough to have the sim itself (without any script) functioning? If i would want to have that usecase without Arduino (for cost reasons) what kind of module could I use?
I can’t really provide you with that, as the company I get them from don’t have that available. I’ll try to get that from them via mail
Oh, that would be a module specifically designed not to be used with an Arduino, and cost less than one that is. This is an Arduino forum.
You are looking for some black box that may well exist but, in the light of the fact that you can get a mobile phone for $35 these days, I wouldn't be surprised if it doesn't.
Further, I might suggest you are hopping off the tram too soon and that, if you want control multiple SIM devices, using an Arduino might be a good way to do it - not to mention cheap.
I also caution that SIM800 are ancient technology, as reflected in their price these days, and may not be kosher on your networks. You may be better off with 4G modules, in which event the cost of the Arduino to drive them becomes trivial.
You can hook up a sim800L module directly to a USB-Serial adapter and access it with a terminal emulator from your PC and configure them, etc..
I'm curious why you would want to have 20 Sim cards receiving SMS, without being able to do something with the content of the SMS.
Unless it's for scraping the remaining balance from some prepaid cards through a tailor made premium paid-SMS service that you would set-up.
Where this software works? On PC? How it connects to the SIM cards ?
its a software from the network provider, as soon as your sim cards are connectedr with at least 2G network, they can be seen and worked with in their tool, so therefore a complicated solution with arduino extracting the SMS would be overkill
Have a look at my last reply, i can do anything with the sims as long as they are online. i also looked into finding cheap phones, but cant really find anything under 10-12€, so a solution with multiple SIM modules like the 800L hooked up in line would be easier and cheaper.
What i also found, were those SIM800C GSM to USB Modules on Aliexpress. Could i just connect those in series to a single power supply and have them running at the same time, providing the SIM and Antenna with power so the SIMs are connected?
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