First of all, connect Arduino UNO with SIM900D module, which isn’t much difficult.Moreover, also have a look at Send SMS with Sim900D in Proteus ISIS in which I have designed a simulation of sms sending in Proteus ISIS. You must also check GSM Library for Proteus, using this library you can easily simulate your GSM module in Proteus ISIS. You should also check How to Send SMS with PIC Microcontroller if you wanna use PIC Microcontroller instead of Arduino board. We can interface this GSM module with any microcontroller like PIC Microcontroller or 8051 Microcontroller but here I have interfaced it with Arduino board. So, there are lots of AT commands available. Like if you want to send sms then there’s a specific AT command for sending the SMS similarly if you want to change the PIN code for your GSM module then you have different AT command. Using these AT commands we let our GSM work for us. AT commands are special sets of commands which are used for communicating with SIM900 module. You should first read the AT commands manual which will give you an idea about AT commands. All SIM900D modules work at AT commands basically so today I am going to show you how to send an sms via AT commands without using any arduino library. There are different types of SIM900D modules available in the market, so it doesn’t matter which module you are using. Hello friends, today’s post as the name suggests is about how to send SMS with Arduino UNO and SIM900D using AT Commands.
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