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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 only echos back the commands- No response

I'm using Atmega32 and sim900 for a project. I keep sending "AT" command and wait for the "OK" response, but all I am getting is AT\r\n. I've checked and rechecked wiring and my baud rate, but still getting no where. Whatever I send to sim900 I only…
STILL_Lok4
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Call recording using AT+CRCPREC SIM COM 800

I want to record current call on my sim 800 modem, as per Tutorial page 135 AT+CQCPREC= 0,amr C:/Audio/20080520_120303.amr command is used for recording but it gives response Error. What can be the possible reason. As "error" don't specify what…
Hot Cool Stud
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SIM900 +CREG? always returns +CREG: 1,0

I'm programming my Arduino Nano so it can send data via a SIM900 module. For setting up the module I do the following: ATC OK: AT OK ATC OK: AT+IPR=9600 OK ATC OK: AT+CMEE=2 OK ATC: AT+COPS=? //this takes a lot of time ATC OK: …
Laokoon
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Size of a GET Request Response

I'm developing a GSM/GPRS application that will report some values each 10 seconds. The SIM that I have to work has only 15MB of data available each month. I'm using a SIM900 GSM chips for your reference. They way I'm reaching the server is via a…
Victor Vargas
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Cant connect to no-ip update servers from sim900

First of all whoever can help me with this, I thank you from the bottom of my heart. This is very frustrating. I am getting 603 error when I do a GET request. Okay. I am using a sim900 and want to send an HTTP get request to no-ip.com 's update…
taz
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Deference between sim800 and sim900

I have developed a card with sim900 and ATmel, and it works very well, but when I changed sim900 for sim800 it did not recognize the sim card. Difference in hardware design? SIM800,SIM800C modem operates from 3.4V to 4.4V supply range (Reduced…
Riadh Yahiaoui
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MySql query with arduino and sim900

I'm doing a project with Arduino Uno and the Sim900 module. I want to do a query to a MySql server with PHP and the Arduino code. Could you help me doing the Arduino code? I've already written the database connection and the query with PHP, the…
Arnau Serra
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How to interface raspberry 2 Model B to SIM900 GPRS/GSM Shield

I bought the SIM900 GPRS/GSM Shield to send SMS and I would like link it to Raspberry 2 Model…
Stefano
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pySerial + SIM800/900 AT commands - read buffer contains write buffer data from before

I've trying to send AT commands via pySerial to a SIM800 module. The problem I'm having is that when I send a command, the message I receive back is the output of the previous command (or sometimes, the previous command itself). My code looks like…
fistameeny
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SIm900 cannot access new simcard

I am trying to get my sim900 to work with a new simcard, unfortunately the Orange provider denies my entry after I give sim900 the pin of the sim: AT+CMEE=2 Successful response for AT query.. +CREG: 0 +CREG: 2 +CREG: 1 +CPIN: NOT READY +CREG:…
Xao
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SIM900 STK cannot browse through menu items with AT command set

I'm using a SIM900 module to browse the Sim Tool Kit menu and perform some actions. I'm able to get the top level menu but can't go further. Below is my AT commands and responses: AT*PSSTKI=1 OK AT+CMGF=1 OK AT*PSSTK="SETUP MENU",1,1 OK *PSSTK:…
Prasad De Zoysa
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Raspberry Pi 3 with A6 GSM/GPRS module not working

I'm trying to use 'AI A6 GSM SIM900' module with Raspberry Pi 3. I did following steps but I'm not able to get serial connection. Connected Raspberry Pi 3 and GSM Module: GPIO 14 (UART - TXD) pin to GSM U_RXD GPIO 15 (UART - RXD) pin to GSM…
Gaurav
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How to know the network status of SIM800 module using AT command?

In my current scenario, I'm using NETLIGHT Pin (Pin no. 64) of SIM800 module with my PIC microcontroller to know whether my module is registered or not? This way I built the circuit. Just I removed LED from VBAT. Then I connect collected of NPN…
appleBoy21
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Sending .amr files to SIM900 over serial in c

I'm trying to send .amr files from my desktop to a SIM900 GSM module over UART. I'm using teuniz's RS232 library. I do the initialisation using AT commands and then read the file into a buffer and write it to the UART using the RS232_SendByte()…
Shoaib Ahmed
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Sending message to a number stored as String in Arduino

I am using SIM900 with arduino mega and have to send a message to a specific number I store in a variable, using AT commands. I am storing the number as a String but it gives an error. Below are the relevant lines of code: String number1 =…
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