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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.

180 questions
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Arduino UNO data not sending to the server/ hit a php file which is uploaded in server

I am using Arduino UNO R3 micro controller and GSM-900a SIM module. I want to activate the data connection of the SIM card and and want to send some data to a specific server or hit a specific .php file which is uploaded in the server. I have tried…
Ananda G
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Raspberry Pi GPRS Connection: Unable to browse after ppp connection is established

I have a persistent problem browsing after connecting my GPRS/GSM Module to Raspberry Pi. I bought the GSM/GPRS Module on amazon at…
code_titan
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Reply by message to sender using Arduino Nano and Sim900 module

I use arduino Nano and Sim900 module. I want, when a message is received, Arduino to reply back "thanks" to the sender. My message receive function code is: void recieveSms(){ Serial.print("\r"); delay(1000); Serial.print("AT+CMGF=1\r"); …
Sadeq
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Arduino connected via TCP using SIM900 to Dweet.io

I am trying to stream some sensor data to Dweet.io using my Arduino connected to a SIM900 GSM/GPRS module. I am able to access internet, load data, check GPRS connectivity etc from my Arduino board. Could someone specifically tell me the syntax to…
Tanveer
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No new sms message notifications Sim900

I have problems with the sim900. When I'm reading the serial port and the sim900 module receives a sms. It send an alert via serial port and cause problems with the reading. I have tried using this command "AT+CNMI=0,0,0,0,0", it works fine if I…
Alex
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SIM900 error 601 when sending a second POST

Using SIM 900 : AT+HTTPINIT AT+HTTPPARA="CID",1 AT+HTTPPARA="URL","www.onewebsite.fr" AT+HTTPDATA=lengthofpostdata, 10000 sending data AT+HTTPACTION=1 AT_HTTPREAD=0, lengthofreceiveddata Up to that point everything works OK Then i send a new request…
rene
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AT commands for sim900 to find sim card number

Which AT commands is used to find the sim card number for SIM900 modem? I have a sim card which was bought long a ago and forget that number. Thanks...
user6161
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Upload Arduino sketch over-the-air (GPRS SIM900)

I have an Arduino in a remote location and would like to upload new code via GPRS (a SIM900 is connected to the Arduino via serial interface). I am clueless of how to accomplish this. Can anyone point me in the right direction? Maybe even someone…
okwestern
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Why does TCP connection keep closing while connecting to xively from Adruino GPRS with AT commands?

I'm trying to send data from a cellular-connected arduino temperature sensor to xively.com using AT commands. I can open the TCP connection, but then it immediately closes. Why does the TCP connection keep closing? setup: arduino…
Goodword
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Can't get SIM900 GPRS server to stream data with TCP clients

I am working on a project where I need to set a SIM900 module attached to a Raspberry PI to work on server mode and receive requests from remote clients. Everything works well as far as setting up the server and receiving client connections. These…
Gabxolotl
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Can't send data to 000webh0st server using arduino uno, gsm sim900, and gps modul. error is at AT+CIPSEND

I want to try entering data into the 000webhost server. In my case study, I use arduino uno, GSM sim900, and GPS module. all went well and there was no error on the GSM. Likewise, the GSP can easily get the latitude and longitude. When you want to…
Nana
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AT command get caller number when already in another call

I am using SIM900A card and currently working on AT commands. I am trying to get caller number when I am already in another call. In theory I should get "CLIP+ number", this only works when I am not in communication. During a call, when someone…
Omar Chaabouni
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Fall detection using MPU6050 and sim900a

I am trying to make fall detection using MPU6050, SIM900a, and Arduino Nano. after uploading the code to Arduino, the serial monitor show me this: serial monitor output this is the code that I have tried, #include // Library for…
Blue Star
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Arduino with SIM 900a- How can I store all incoming messages into a text file?

I have connected my Arduino Uno with SIM 900a GSM module. I want to store all my text messages that I receive on the SIM inside the GSM module to a text file continuously. I can send SMS through the code shown below but I cannot receive and save my…
user9622529
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SIM900 GSM Module | How to check if the outgoing-call is answered

After sending an outgoing call using SIM900 GSM module using AT commands, is there a way to know if the person receiving the call has answered it? (directly communicating with GSM module using serial)
Anthony Fernando
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