Esp8266 With Gsm Module Trial And Communication

ATCRC SET CELLULAR RESULT CODES FOR INCOMING CALL INDICATION: GPRS COMMANDS: GSM Sim900A with Arduino: Following are the detailed GSM Sim900A based projects.

SIM900A features GPRS multi-slot class 10 class 8 (optional) and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4.

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PWRKEY should be pulled low to power on or power off the system.

The power supply of SIM900A has to be a single voltage source of VBAT 3.4V to 4.5V.

It must be able to provide sufficient current in a transmit burst which typically rises to 2A.

The first thing that you will notice about this GSM module is that, it has no onboard voltage regulator, so be very careful while applying the voltage; Because voltages greater than 5 volts can easily damage this module.

Ideal voltage for this GSM module is 4.7v but you can easily power up this GSM Sim900A module using a 5v adaptor.

Although it has a power supply pin which can be connected with the Arduinos 5 volts.

When no sensors are connected with the Arduino then you can Run this GSM module without any problem.

But the time you start connecting different sensors with the Arduino, then Arduino cannot provide enough current to the Sim900A Module due to which the Arduino starts resetting.

In my case as I will power up this module using the external power supply so I will leave this pin unconnected.

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Esp8266 With Gsm Module Trial And Communication

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