Sage-Tips

How do you power a GSM module?

Both 1.8 volts and 3.0 volts SIM Cards are supported by SIM900A – the SIM card voltage type is automatically detected.

1. Assemble GSM Antenna to the modem.
2. Connect serial cable to the modem.
3. Give power supply in between 4.5V to 12V through the power jack provided.
4. Default factory Baudrate is 9600.

Does GSM need power supply?

To power up the GSM SIM 900 module you need minimum 12V power supply. Moreover, you need a RS232 to serial converter or USB to serial converter. Check the type of serial interface used in the GSM module and decide the type of converter you want to use.

How do I power a SIM900 GSM module?

You can choose the power source from the DIP switch beside the Antenna. Typically, the module has its own power socket. So you can power it from a separate power supply of about 12V/1A or 5V/2A.

How do I send SMS from SIM900A?

SIM900 AT commands

1. set the SIM900 to text mode: AT+CMGF=1\r.
2. send SMS to a number: AT+CMGS=PHONE_NUMBER (in international format)
3. read the first SMS from the inbox: AT+CMGR=1\r.
4. read the second SMS from the inbox: AT+CMGR=2\r.
5. read all SMS from the inbox: AT+CMGR=ALL\r.

What is SIM900A GSM module?

SIM900A GSM Module is the smallest and cheapest module for GPRS/GSM communication. The module offers GPRS/GSM technology for communication with the uses of a mobile sim. It uses a 900 and 1800MHz frequency band and allows users to receive/send mobile calls and SMS.

Can we use 4G SIM in SIM900A?

Generally it should work. As SIM900 is just 2g, the 3G sim works in it as 2G. It might be that the sim voltages are not compatible, but it should not be an issue. I have used a 4G sim in a sim 900 module without troubles.

Does SIM900A support 4G?

(900,1800 MHz)it supports only Asian region countries. Considering about the speed you cannot obtain 3g, 4g speed since GSM Shield(SIM900) provides maximum of GPRS class 10: max. 85.6 kbps (downlink) so, It will able to connect but cannot get such speed in 3g and 4g.

How to connect sim900a to Arduino with GSM module?

If you hear a ring back, the gsm module has successfully established network connection. You can see a TTL pin with 3VR, 3VT, 5Vr, 5VT, VCC and GND on your sim900a near your power supply pin. You have to connect GSM’s 5VT to Arduino D9 and GSM’s 5VR to Arduino’s D10 for serial communication between arduino and sim900a module. 1.

What is the SIM interface of the sim900a?

The most important one is the SIM. The SIM needs to connect with the module for GPRS/GSM functions to fully operate. All the sim interface of the module is: The module has only a single pin to detect and convert the analog signal to digital for SIM900A. The voltage range on the ADC pin is from 0 to 3 only.

What is the function of sim900a in Samsung Galaxy a7-2016(sm-a710fd)?

SIM900A is a GSM module that function like phone. It can send a message, call a phone number and use GPRS to send data. Here’s the simple feature taken from it’s datasheet : We just need connect 4 wires to SIM900A module, that is power connection (VCC and GND).

What is the baud rate of sim900a GSM modem?

The baud rate is configurable from 1200-115200 through AT command. The GSM/GPRS Modem is having internal TCP/IP stack to enable you to connect with internet via GPRS. SIM900A is an ultra compact and reliable wireless module.