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Questions tagged [sim900]

The SIM900 is a complete Quad-band GSM/GPRS solution in a SMT module which can be embedded in the customer applications.

The SIM900 is a complete Quad-band GSM/GPRS solution in a SMT module which can be embedded in the customer applications.

Featuring an industry-standard interface, the SIM900 delivers GSM/GPRS 850/900/1800/1900MHz performance for voice, SMS, Data, and Fax in a small form factor and with low power consumption. With a tiny configuration of 24mm x 24mm x 3 mm, SIM900 can fit almost all the space requirements in your M2M application, especially for slim and compact demand of design.

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Sim900 Won't Find Networks

I have a Sim900 from Sainsmart. I have a working serial connection from my Raspberry Pi to Sim900. I can write commands, receive responses, and even query data such as my phone number from the Sim Card. My Sim Card is an AT&T card. I cannot make…
Alexis Evelyn
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Arduino SIM900 receive a phone call

I created an Arduino program that can be send and receive SMS/voice calls. But I do not know how to receive a phone call. Everything works except the Get_Call() function. I want this function to receive a phone call and stop this call with a serial…
sazearte
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SIM900 not working with Arduino

Recently I bought a SIM900A module and an Arduino Mega 2560 to run my old code for sending SMS and call, but now there is a problem as I am unable to send SMS or call. My code is attached below. #include SoftwareSerial gsm(2,…
Vicky
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How to do AT+CIPSEND in a sim808 module?

Can anyone help me with a sim808 module , when I send at+cipsend command on uart it send just \r ( without \n). What could be the reason?
Adrian Cojocari
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SIM5320 Arduino GPRS shield with MQTT

The new arduino GPRS/GSM 3g shield says that it has MQTT support with AT commands. However, each command that I've tried from the official documentation has returned an error and every other person on the internet has reported the same thing. I…
user3804794
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Send GPS Shield data to GPRS Shiled (Sim900)

I'm working on a vehicle telemetry project. For that I was trying to get GPS data from a GPS shield and send them to thingspeak using Sim900 GSM/GPRS shield Get command. The board I am using is a Arduino Uno. The problem was the GSM/GPRS shield I…
heshan deeyagaha
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sim900 only responds to AT commands when empty sketch is uploaded

I am using a gsm sim900 shield connected to an Arduino uno for my project. The Sim900 only responds to AT commands when I upload an empty sketch to the Arduino. If I put any AT command code in the sketch, the sim900 just echoes the AT commands…
Symon_B
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How can I send data to a web server and read that by sim800 or sim900?

I've heard that there are two methods to do that, GET and POST and I know the differences like in GET method we send data in URL and in POST method we do that in some rules. But I don't know how to do that with sim800 or sim900 and how to configure…
Majid Roustaei
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Sim900 GSM module keeps disconnecting when it's used as a TCP Client

I’m trying to interface a Sim900 GSM module (This one: http://www.elecfreaks.com/store/gprsgsm-moduleefcom-pro-efcompro-p-450.html) with a Tiva C microcontroller to initiate a TCP connection using a sim card. The problem is that once the GSM module…
Eslam Samir
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Communicating with SQL Database with Arduino and Tracking Shield Sim900A

Since Last many days I am trying to Send the Data to SQL Data base via GPRS. I tried doing many program, like using AT commands, but none works. I am using Aurdino Uno R3 and Tracking Shield sim 900A from Rhydolabz
Viral Parmar
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GSM not responding to AT commands

I am using GSM 900A modem which requires 5V Supply. I am connecting it to Arduino UNO. I am giving supply to modem by arduino 5V and GND pin. I am connecting RXD pin to TX(pin 1) of arduino TXD pin to RX(pin 0) of arduino and GND to GND of arduino…
Mudit Sharma
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How to use response from sim900 module?

Thanks in advance. I am using arduino and sim900 module to send my sensor data by SMS. Now I want to check SMS left in my sim card. I'm using below code to do that.("AT+CUSD=1,\"*451#\"\r"). I want to send that response to my mobile. but i don't…
Dileep
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How can I read the flow of the arduino water flow sensor every certain period of time?

I'm trying to read or determine the water flow with the arduino. At this moment I haver connected: Arduino UNO. Arduino GSM SIM900 Module Arduino Water flow Sensor And here is my code: #include SoftwareSerial SIM900(7, 8); //…
user3349314
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Arduino to Sim900 wiring

I need your help. I am newbie in here I want to create communication between arduino and sim900 gsm/gprs module, but I am still confuse about the wiring there are two type wirings in sim900 to arduino, hardware serial wiring and software serial…
user7131683
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SIM900 module not responding on hardware COM port

I've got my sim900 module working with arduino by using their software serial library, however, I want to eliminate arduino from the equation and have serial communication directly to sim900 module. I'm using putty as my terminal emulator. It's…
Shady Programmer
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