What is sim300?

SIM 300 is a GSM modem with a simple serial interface. SIM 300 modem can accept any GSM network operator SIM card and act just like a mobile phone with its own unique phone number. With this module one can send/receive sms, connect to internet via GPRS and receive calls.

Whats is the use of AT commands?

AT commands are instructions used to control a modem. AT is the abbreviation of ATtention. Every command line starts with “AT” or “at”. That’s why modem commands are called AT commands.

Why do we use AT commands?

What are AT commands? AT commands are commands which are used to control the modems where AT stands for Attention. These commands were derived from Hayes commands which were used by the Hayes smart modems. Every wireless, as well as the dial up modems, require an AT command to interact with a computer machine.

Where are AT commands used?

modems
AT commands are commands which are used to control the modems where AT stands for Attention. These commands were derived from Hayes commands which were used by the Hayes smart modems. Every wireless, as well as the dial up modems, require an AT command to interact with a computer machine.

What do AT commands do?

How does the AT command work?

at command is a command-line utility that is used to schedule a command to be executed at a particular time in the future. Jobs created with at command are executed only once. The at command can be used to execute any program or mail at any time in the future.

How to test sim900 GSM module?

Before you begin make sure your SIM900 GSM module has acquired the network and it is ringing when you make a call to it. Then test the basic AT commands and then proceed further. Once you are ready, you can start by first setting up the GPRS connection as follows, Text in RED is typed by me and text in GREEN is the response from SIM900 module.

How to connect Arduino GND to sim800 module?

You should supply SIM800 module with exactly 4.2Volts. I have used LM2596 Step Down Module. You must tune output voltage to 4.2 Volts from potensiometer. Dont forget to compound Arduino GND with LM2596 Output (-). Open a blank Arduino Sketch and upload the code below: Open AT Command Tester Tool.Click Find ports and select the correct port.

What can you do with sim800l?

Sim800L is the cheapest solution for your GSM/GPRS controlled project. You could make phone calls, receive and send text messages, get location info. You can do anything that you have done with your mobile phone. Before integrating this module to your project you should check if the module is working accurately.