Questions tagged [gsm]

GSM is a very widely used standard for communication over mobile phone networks.

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5answers
4k views

GSM dongle instead of GSM shield?

I googled for this problem many times and ended up with no results, so I decided to post it here. Can we use a GSM Dongle (usb dongle) instead of a GSM shield (like SIM900 module) to send and ...
2
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1answer
875 views

Passing a long string from SoftwareSerial to Serial

I'm currently playing around with a GPRS shield on an Arduino Uno, for which I have to write raw AT commands over the SoftwareSerial. At the moment, I just want to be able to talk to the GPRS from my ...
5
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1answer
58k views

How to communicate the Arduino board with SIM900?

I have a problem. I bought a SIM900 board, but I can not connect there with the Arduino. To send AT commands on the serial the SIM900 doesn't respond, but the LED indicating that the network is on. I'...
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1answer
367 views

GSM Modem with MAX232 to Arduino Serial?

I have GSM modem that has MAX232 interface for RX/TX/GND on three pins. Is it possible to interface Arduino in some way? Tnx for help.
5
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4answers
8k views

Simulation of Arduino Mega 2560 with GSM Module using Proteus

I have really been suffering with my simulation! Tried connecting my arduino mega 2560 to COMPIM (used as GSM Module) in my circuit and also loaded sample code but damn! In vain! I wanted to view the ...
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0answers
387 views

Can I use an Arduino and GSM breakout board for triangulation?

IS there a way for me to use cell towers to triangulate my location with an Arduino Uno and GSM breakout board? if so how?
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0answers
281 views

How to forward sms using arduino uno + gsm shield

hey there I'm new to arduino. I'm working on a project that needs to send an sms to get a response and forward the response to another mobile. What is the easiest way to do so
0
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1answer
1k views

Error while sending message using gsm sim900a module interfaced with arduino uno

The code used for interfacing the gsm module with arduino for sending a message is as follows :- #include <GSM.h> #define PINNUMBER "" // initialize the library instance GSM gsmAccess; // ...
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0answers
346 views

How can I open simultaneously 2 client socket connections with GSM shield?

How can I open simultaneously two socket connections with a GSM shield? It seems that when I try to open the second connection, it is not opened, and additionally the first connection is closed. ...
1
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1answer
107 views

Data at Serial Port Avaliable

I am interfacing a GSM modem via Arduino at Serial port 2. I have seen that responses fron GSM modem are subject to time. Sometime its response are fast and sometime it are slow. I have a code like ...
2
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1answer
148 views

Board recommendations for GPRS/GSM for 'on the go'

I have been tasked to find a way of communicating to a webservice from my microcontroller - yay! With little-no real grasp on sms/etc (due to not ever 'using' it before), it appears that my knowledge ...
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0answers
437 views

integration of GSM module and Bluetooth using arduino

Please help me. There is a conflict when I put GSM and Bluetooth module in one MCU. The problem is when I use the GSM, the Bluetooth will not respond and vice-versa.
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1answer
899 views

SIM900 GRPS Shield Power down over issue AT+CIICR cmd(Bring Wireless Coms)

I'm trying to get the TinySine SIM900 GPRS Shield working to get data over the GPRS network, using Arduino MEGA. I'm Able to register my SIM with this Shield and even , but as soon as I sent the ...
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1answer
2k views

Arduino Based Home Automation System

I am working on my project of home automation system using Arduino GSM SIM900 & four channel relay module. I am facing a problem in my code. Can any one help me on this, SMS is receiving but its ...
0
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1answer
441 views

Several SIM with Arduino GSM/GPRS shield

For some purpose we need to communicate with Arduino using more that one SIM card, but still like to use an only GSM shield. So, the idea is to use several SIM holders, to commutate each of six SIM ...
0
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1answer
929 views

EFCom GPRS/GSM Shield

I have an EFCom GPRS/GSM Shield http://www.elecfreaks.com/wiki/index.php?title=EFCom_GPRS/GSM_Shield and I am using it with a mega 2560. The problem is that the code in the wiki page //Serial Relay ...
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1answer
232 views

Arduino UNO GPS module

I am thinking about buying a gps module for Arduino UNO. I would like to install it on a self-build RC-car which is also controlled by Arduino. The problem is, I cannot install the gps module on the ...
2
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2answers
353 views

SIM300cz AT command returns -1

I connected SIM300cz module's GSM board with Arduino Mega. The GSM board has the pins VCC, GND, RXD, TXD, GND, RI, DTR, STATUS, PWKEY and GND. I connected the GNDs with Arduino's GND, VCC to Arduinos ...
0
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2answers
4k views

Using Arduino's hardware serial to control SIM900

I have a SIM900 board which has a serial interface. I'm trying to control it using Arduino Uno. I've tried using SoftwareSerial on pins 10 (RX) and 11 (TX) to talk to my board. It works OK with ...
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0answers
531 views

Arduino GSM Shield web server hangs

I use official Arduino GSM Shield with Uno R3. I uploaded web server examples from official GSM library. I use a simple python script to make TCP/IP connections to my GSM Shield web server. I send ...
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3answers
5k views

Arduino GSM shield GSM_READY not ready ever

I am using an Arduino Mega and an Arduino GSM shield. I am using the receive SMS example under GSM in the Arduino IDE. My GSM shield's hardware IP is set correctly. Here is the sketch: /* SMS ...
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0answers
1k views

Change XBee shield TX/RX Software serial?

I am looking to have an Arduino UNO stack with a GSM Shield and an XBEE shield for wireless communication. However, since the GSM Shield requires digital pins 2 and 3, I would have to reroute the RX/...
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0answers
437 views

Garbled data output from sensor through XBEE?

I have a fio v3 + a 9DOF sensor hooked up to an XBEE. On another UNO board, I have a GSM shield and another XBEE board. The fiov3 is supposed to sample data from the sensor, send it through the xbee....
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0answers
217 views

GSM shield SIM card troubles

So I'm trying to use the GSM shield to communicate with my smart phone. The SIM card that came with the shield only works with other devices on that network, and it's an obscure latin network that I ...
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1answer
536 views

Arduino GSM Shield not responding?

I'm trying to get my Arduino GSM shield working with the example "Send SMS" code provided. However, when I upload and compile the program, the serial monitor displays "SMS Messages Sender" and nothing ...
0
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1answer
3k views

Combine Code Arduino GSM Shield and Adafruit GPS Shield

I have a problem to combine both code for Arduino GSM Shield and Adafruit Ultime GPS Shield. I already change my code to the basic one like examples. I think i found the problem. The problem is when i ...
1
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0answers
697 views

Can you interface GSM, WiFi, and Bluetooth LE shield to Arduino?

I have a project that requires the following three shields and I was wondering if the Arduino has enough space to interface all of them at the same time. I am thinking of connecting each shield into a ...
0
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2answers
485 views

Problem with NFC on Arduino MEGA

My Objective : I am trying to send my Mifare's unique number with some other parameters to my server database. As soon as the tag come closer to NFC, it detects, and some additional details are ...
0
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1answer
398 views

GSM arduino to webservice not working

I have setup a arduino with a SIM300 based GSM board. I have Tx of Arduino connected to the Rx of GSM board Rx of Arduino connected to the Tx of GSM board Gn of Arduino connected to the ...
0
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2answers
10k views

Not able to send SMS to Mobile using GSM900A and Arduino Uno

I tried the code shown below (found here) void setup() { Serial.begin(9600); //Baud rate of the GSM/GPRS Module Serial.print("\r"); delay(1000); Serial.print("AT+CMGF=1\r")...
7
votes
2answers
12k views

Difference between SoftwareSerial and Serial

From the sample code #include <SoftwareSerial.h> SoftwareSerial mySerial(10, 11); // RX, TX void setup() { // Open serial communications and wait for port to open: Serial.begin(57600); ...
0
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4answers
11k views

AT+CSTT throws an error

I am getting an error on AT+CSTT="TATA.DOCOMO.INTERNET","","" What am I missing here? Code void setup() { // Open serial communications and wait for port to open: Serial.begin(9600); while (!...
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1answer
2k views

Code does not pass `gsmAccess.begin(PINNUMBER)==GSM_READY)` [closed]

I am not able to get my code to pass if(gsmAccess.begin(PINNUMBER)==GSM_READY) { I have modified the PIN number on my sim card to be 0000, and yet its stuck on begin. How do I prepare the SIM ...
1
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0answers
493 views

SIM 900 + Arduino Mega attachGPRS problem, GPRS_READY

I have connected my GSM module to my Arduino. Using AT commands I am able to connect to internet. Using the following link of tutorials, I tried to connect to internet http://arduino.cc/en/Tutorial/...
2
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1answer
414 views

Connecting a Arduino to FT232

I found this wonderful breakout board based on FT232. I wonder if I can use this board for connecting my arduino to a USB dongle for 3g/GPRS connection ? From what I understand this board can be ...
-1
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2answers
536 views

Arduino GSM Module with network GPS

I have looked through the AT command set of Arduino GSM Shield boards. I dont find any AT command that provides network GPS. I wonder what I am missing. Why isn't it possible for GSM module to provide ...
0
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2answers
2k views

Arduino stacking wifi and gsm shield

I'm fairly new to this and I need some help before I buy anything... If I understand correctly I can buy an arduino, couple of shields and just stack them one onto another if they are compatible... ...
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0answers
203 views

GPS - Speed doesn't update as should - EM408 & Arduino Mega & GSM

I'm developing a system that will get the GPS signal and send it though the GSM with information about position, speed and temperature from some digital sensors. Currently I'm using the GPS EM408, ...
1
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1answer
888 views

GSM library , sendSMS, string instead of char

I used the GSM library that comes together with arduino 1. Specifically the sendSMS part. I managed sucesfully to send SMS. Now the thing is, inside this library the SMS to send is stored in a char ...
2
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2answers
438 views

Understanding arduino shield schematics

I am researching the schematic of the arduino GSM shield. Link is this: https://www.sparkfun.com/datasheets/DevTools/Arduino/cellular%20shield-v12.pdf What i do not understand is the upper right part,...
7
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2answers
4k views

SerialGSM for GSM shield without SoftwareSerial

SerialGSM is a library for simplifying GSM shields. This is sample code for sending SMS: #include <SerialGSM.h> #include <SoftwareSerial.h> SerialGSM cell(2,3); void setup(){ Serial....
5
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2answers
8k views

Receiving SMS by Arduino GSM Shield and control the LED with the content of this SMS?

I am using Arduino GSM Shield receiving SMS from an Android app. And the content of this SMS will control a LED. If the content of this SMS is not "off", the LED will be on and the content will be ...
2
votes
1answer
1k views

Send text according to an ultrasonic measurement, on battery

I have this big bucket where I would like to install an arduino on the top of the bucket where it would calculate the % of the bucket being filled up with water. Then, every day at night the arduino ...
1
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1answer
1k views

SoftwareSerial error

I have arduino , upon arduino I have Arduino GSM shield (Tx-2, Rx-3, Modem reset-7) and upon it, I have the Adafruit GPS Logger shield. I am trying to send sms of Latitude from the GPS Logger shield ...
1
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1answer
920 views

Unable to read text file from server

I saw the Web client Example , In the example, the server connection is initialized in setup(). But I want the server to update the text file every time. So, I need the server connection to be in ...
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1answer
551 views

How to update a text file dynamically

I have Two Arduinos, One with the help of sensors it will dynamically updates in to my server database. Other Arduino, reads the stored contents from the server database and sends sms to phones. Now, ...
-1
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1answer
215 views

How Server request happens?

Can somebody explain the below code, like how the server understands, how the request goes to the server from the below code. if (client.connect(server, port)) { client.print("GET /abc.txt"); ...
0
votes
1answer
1k views

SMS in modem's memory

I am working on SMS communication with my phone and Arduino. My intension is simple. When somebody send an SMS, the Arduino should read a text file located on my server and forward the content to the ...
-2
votes
1answer
443 views

Receive SMS example gives me a garbage values

When I run my Receive SMS example code, By default every time I get the same thing.I am trying to send sms to my sim card present in the Arduino GSM shield. I don't want this message. How to solve ...
1
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1answer
2k views

GSM and GPS shield pin conflict

I have an Arduino GSM shield and I plan to purchase an Adafruit GPS shield. The GPS module uses Pin 7 & 8 for Rx and Tx, but the GSM shield uses Pin 7 for Modem Reset. Will the overlap on pin 7 ...

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