Stack Overflow
Stack Overflow

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
1
vote
1 answer

Server disables page after several GET requests from SIM908

I set up a free domain on 000webhost.com I am using this as a web server to receive data from SIM908+arduino setup and store it in the database. Then display it on a web page. I am sending the data from the SIM908 using HTTP GET requests. Basically…
Tahmid Ekram
  • 88
  • 6
1
vote
2 answers

HTTPREAD missing characters with Arduino and SIM900

I am using a SIM900 module with my Arduino and it is missing characters although it is returning the right number of characters expected. I have ERROR on AT+SAPBR=1,1 and AT+HTTPINIT so I am not sure if this is the reason for it. Im not sure how to…
Enayet Hussain
  • 908
  • 4
  • 17
  • 33
1
vote
0 answers

Sending data to Xively using Arduino mega + GSM shield sim 900

I want to send my sensor data to xively using GSM shield SIM900. After running my code i am getting 0 as a response from server. Please help me to figure out what's the issue? I am using rhydolabz's GSM SIM900 module with adriuno #include…
Shanu
  • 11
  • 1
1
vote
2 answers

SIM900: How to be sure how much time to wait between serial(UART) transmit and receive

i have written a library in C for using the SIM900 GSM with my uC but it has many many bugs. Sometimes it works sometimes not. My hardware works fine I think. I rewrote it and made sure that the basic functions are bug free. SIM900_transmit( char*…
Tedi
  • 203
  • 1
  • 13
1
vote
1 answer

AT Command to change frame size gives ERROR

I'm using a SIM900A GSM Shield to communicate between an arduino due and an API. I currently using it's default values in the multiplexer of GSM Shield. But now I'm in need of changing it's frame size to 255. When I check the current frame size, it…
user4700203
1
vote
2 answers

Why I could not read the other received sms's except the first SMS?

I have to read the incoming SMS on my gsm module SIM900 (which is connected to Arduino), and I want to print the sender number and message on to serial monitor. I first configure gsm module with AT commands and Response() function will give me the…
NShiva
  • 60
  • 10
1
vote
0 answers

Arduino response USSD command truncated

I'm trying to send a USSD string with Arduino/SIM900 module. This is my code: mySerial.println("AT+CMGF=0"); delay(100); mySerial.println("AT+CUSD=1,\"*123#\""); delay(10000); if (mySerial.available() >0) { …
Giulio
  • 221
  • 2
  • 15
1
vote
1 answer

sim900a sms take long time to arrive

i have trouble with my SIM900A GSM i can send one SMS successfully ("arrived in less than one minute") but when i send another SMS after first one (delay more than one minute "it's not for bulk purpose") the second message take about 15 minutes or…
asem mokllati
  • 217
  • 4
  • 18
1
vote
1 answer

What is proper way to read and delete message from SIM900?

I would like to wait in loop for sms message arrival on my SIM900 and when message is detected , read that message and delete it from the system. What's bothering me is what if another message comes while I am working on this one (Unsolicited…
user505160
  • 1,176
  • 8
  • 25
  • 44
1
vote
1 answer

My arduino sim 900 won't send sms or call

I have arduino uno and this SIM900 gprs/sim. I followed this tutorial and everything was fine. The code was properly updated and led lamps was properly shining, but it won't send sms or call someone. Then I trid code from this site, but my serial…
Đuro Pedala
  • 19
  • 6
1
vote
1 answer

Arduino + sim900 + xively

I have a problem, I'm new to Arduino and I'm totally a beginner. I bought a SIM900 Quad-band GSM / GPRS Shield for Arduino (http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=221176159800&ssPageName=ADME:X:RTQ:US:1123) and I have two problems. (I…
Vragolasti
  • 11
  • 3
1
vote
1 answer

Sending Concatenated SMS (with more than 160 chars) in text mode

I have gone through the questions about sending multipart SMS in PDU format , I am looking for a way to send them in text mode, How can I do that using AT commands Wikipedia - Concatenated SMS PDU Mode SMS
dmSherazi
  • 3,743
  • 5
  • 37
  • 62
1
vote
1 answer

How to send MQTT 'Publish' packet using (GPRS )sim900 modem?

I'm using sim900 modem with raspberry pi, I'm able to connect to server using AT command for TCP, but when I try to send mqtt Publish packet as follow(I used tcpflow to get this packet from mosquitto…
amg
  • 127
  • 1
  • 3
  • 12
1
vote
1 answer

Sim900 + arduino server stops listening after a while

So I try to make an arduino + sim900 gprs server, but after a while the server stops responding to http requests, the status is still "listening" but it just doesn't "discover" any new requests. restarting the connection fixes the problem, below is…
izzy
  • 185
  • 1
  • 1
  • 9
1
vote
1 answer

Getting bad request response while sending data to server using the gprs connection in SIM 900

I am trying to establish a connection with server using SIM 900 modem. at+cgdcont=1,"IP","airtelgprs.com" OK at+cstt="airtelgprs.com","","" OK at+ciicr OK at+cifsr 100.67.249.40 at+cipstatus OK STATE: IP STATUS at+ciphead=1…
vishnub1626
  • 2,063
  • 2
  • 14
  • 14
1 2 3
…
11 12