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Questions tagged [gsm]

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

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2k views

How to control relay using SIM800 and Arduino Mega through SMS?

For my project I need to control relays through SMS and now I can send SMS from my SIM800 module which is connected to Arduino Mega R3. But I tried several shapes for AT commands to receive SMS and ...
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2answers
3k views

DB:NO RESP Using inet.httpPOST on loop()

I'm using SIM900 module + arduino uno + gsmlib.org library. I'd like to send a string to endpoint on my API , and it worked correctly for the first time when I using inet.httpPOST function in setup(),...
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1answer
154 views

Print the response from GSM shield

I have a GSM shield connected with my Intel Galileo board. I intend to connect the board with serial communication at a baud rate of 115200 instead of the GSM library. I want to print the results of ...
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1answer
2k views

Arduino GPRS (GSM) shield (SIM900) no long pins

I have bought a SIM900 shield for an ordinary Arduino Uno board. The problem is that it doesn't have long pins on the bottom side, making it impossible to click on mu Arduino Uno. The shield I have is ...
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1answer
452 views

How to perform a data transfer to an external server

So I'm doing a project that involves getting sensor data from several sensors, and then sending them to an external server when a tragic occurs. But I've been having trouble figuring out how to send ...
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1answer
4k views

GPRS SIM900 and GPS NEO-6M don't work together

I'm trying to get GPS coordinates and send them to my API through the GPRS SIM900 and GPS NEO-6M shields. In setup(), I first start the GPRS shield and call the function that connects to the internet....
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1answer
9k views

Send JSON via POST on SIM900 shield with AT commands

I'm trying to send a JSON POST in SIM900 shield with AT commands. After I call the AT+HTTPACTION=1 command, it returns a 601 error: +HTTPACTION:1,601,0. I saw here that the error was 601 Network ...
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0answers
720 views

how to detect the incoming message from sim800 GSM module

I am designing an motorcycle security system and I need to receive the message from the user.Hence i need to detect the incoming message and read the number and data from the message
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1answer
514 views

Can I connect an Arduino GSM Shield directly to a PC?

Is it possible to communicate with and use the GSM shield directly from the computer, without using an arduino board?
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1answer
2k views

connecting SIM900A GSM/GPRS module Arduino Mega

i have bought following SIM900A GSM/GPRS module. I need to connect it with Arduino Mega. Can anyone answer me which pin i need to connect to Arduino??
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0answers
155 views

Why After instancing TinyGPS , serial stop working?

I have GSM shield (and Arduino UNO) works fine with this code : #include <GPRS_Shield_Arduino.h> #include <SoftwareSerial.h> #include <Wire.h> #include <Suli.h> #define ...
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1answer
664 views

What are the components of a Xively HTTP PUT request to send to my SIM800 GPRS module?

I have an Elecrow GPRS shield which I want to use to post temperatures from 3 x DS18B20s to Xively. The example code is a mystery to me. You can find in full at this link: http://www.elecrow.com/wiki/...
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0answers
2k views

Sim800L HTTP post request stop working after a while

I am desperate to get my SIM800L module (http://www.ebay.co.uk/itm/SIM800L-GPRS-GSM-Module-Board-Quadband-QUAD-BAND-Antenna-for-MCU-Arduino-/321992759287) sending POST requests for a long period of ...
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1answer
1k views

How to set Delay on GSM shield?

I bought a Gsm module recently(not official arduino shield) and i connect it to Arduino uno. The problem (I guess) is , i can't set delay properly, the terminal send it too fast that i missed it or ...
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1answer
449 views

What should I do to communicate with GSM module?

Sorry, im a beginner, i tried to program an automatic doorlock using sms. But, I dont understand what happen with this error, what should I do? Add library? The error said that Pstring wasnt declared, ...
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3answers
170 views

Arduino GSM Shields stacking

I'm researching options for a project in which I need to send/receive SMS messages to/from multiple users of different service providers. Hoping to reduce costs, I'm thinking of forwarding the ...
2
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1answer
2k views

Sending data to a webserver with GPRS/GPS Shield (U-blox Sara G-350)

I am working on a project for tracking cars. I am using an Arduino UNO to receive the position from GPS/GPRS shield. I am OK on obtaining the coordinates position. Now I need to send the position to a ...
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0answers
430 views

Help with school project (Arduino GSM and Thermal printer) [closed]

I'm with some friends from my school and we have started to do a project where we send an SMS text message to our Arduino UNO (with GSM module), which then print the text message on a thermal printer(...
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0answers
133 views

SIM900A GSM/GPRS Shield Transaction per minute

I'm planning to buy SIM900A GSM/GPRS Shield for Arduino Uno. I wanted to create an application that sends SMS to a list of mobile numbers, let's say 1000 mobile numbers. Is it applicable to use ...
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1answer
620 views

SendSMS example sketch hangs at PINMUNBER if statement

I'm using an Arduino shield connected to an Arduino Uno for sending text messages. I'm using one of the in built examples from the Arduino IDE for sending SMS by name - sendsms in the GSM examples. ...
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0answers
308 views

How to send latitude and longitude as text message on mobile? [closed]

I want to check speed at certain time interval, if speed is greater than certain (speed) value then send latitude and longitude as text message
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1answer
381 views

How to limit the number of message that an Arduino sends to a phone without terminating it

I just stayed on delay() since that is the only thing I know but the thing is delay() cannot be interrupted. What I'm trying to achieve with this code is: When the soilSensor detects moisture it ...
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1answer
9k views

Sim800 sim card requirements

What kind of a sim card is required for sim800 module? I know it must be activated and must be valid. But about 2g, 3g or LTE...What kind of a sim card in overall should I use with this module?
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1answer
12k views

How to check if a GSM module is working or not?

I wanted to know if my GSM sim800 is working or not. A mishap occured while I was experimenting around with my GSM module and I arduino uno. The link to the module which I bought: http://www.ebay.in/...
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2answers
3k views

Using Rx and Tx pins(0 and 1) on Arduino Uno for GSM

I am using a GSM module sim800. My module responds to the output given by my PIR sensor and sends sms according to it. My module has got +5V, GND, Rx and Tx pins. What are the pin connections that I ...
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1answer
569 views

Problem while writing sketch for GSM module sim800

I wanted to my GSM to recieve SMSs. I have written a sketch for it. But while verifying the sketch an error pops out in this part: if (sms.available()) { sms.remoteNumber(senderNnumber, 20); ...
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1answer
595 views

arduino and gsm module receive

Can you help me with the codes? I have gizduino(arduino clone), i used the codes in receiving sms from the internet but what i receive is a symbol "y" with two dots at the top. Whats wrong? My gsm is ...
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2answers
278 views

Functions of GSM

I am currently working on an arduino project and wanted to use a GSM module. This is my first time working with a GSM module. So I had a few queries. What can a GSM module sim900a do with arduino ...
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1answer
7k views

SIM800 or SIM900 library for Arduino

I have a SIM 800L module which I am using to send /receive SMS calls. I just wanted to know whether there is any library suitable for the SIM800 for arduino. I don't need GPRS functionality . I see ...
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1answer
441 views

What phone carriers are available in the USA that are compatible with a sim900 breakout board

I was wondering what carriers are compatible with a sim900 breakout board. I know it needs a GSM network (AT&T,T-mobile,?) but what networks can I use? It needs a 850/ 900/ 1800/ 1900 MHz ...
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1answer
374 views

How to send a group message to multiple receivers using GSM900 and Arduino Mega2560?

I'm working on a project and it can send to one receiver only. What I need is to send a message to multiple receivers. I need a code sample that would satisfy my needs. Please help! I need to finish ...
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3answers
1k views

Communication between two Bluetooth modules of two Arduinos

I am designing a home automation project. I want to control different home appliances through GSM. I am designing it in such a way that each apparatus is connected to an Arduino and bluetooth module. ...
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0answers
258 views

Unable to read any SMS's other than the first SMS using SIM908 shield

I'm using two SIM908 shields to communicate with each other. One of the shields will be connected to a sensor and it should send values contentiously to the second SIM908 (receiver). I'm facing a ...
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2answers
4k views

SIM900 Modem is not responding

I'm working with arduino nano and it has interfaced with SIM900 GSM. I'm sending "AT\r" to GSM modem, but not getting response. void setup() { Serial.begin(9600); Serial.println("Setup is Ready")...
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1answer
66 views

Error while compiling

I made a code which can send the message to the entered phone number while it receieves a specific message or when the push button is pressed. but it is showing the error that 'smsReceivingFunction' ...
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1answer
361 views

Communicating Arduino with Intel Galileo

I'm doing a project where I have few sensors on Arduino Uno. Now I am trying to send some data to the internet where i figured using my GSM shield with the Galileo board I have is the best solution. ...
0
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1answer
165 views

Problem in receieving message

I'm working on a project in which when I press reset button the arduino should send longitudes and latitudes to my phone. I'm a beginner and tried to join two codes, first code can send the message ...
2
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0answers
6k views

Sending AT commands to a gprs shield using serial port

I have a GPRS shield connected to an arduino uno board, i want to use the shield to send sms and do phone calls, from a C# Wpf application, the arduino is connected to the application using the serial ...
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2answers
3k views

GSM Modem Connection Directly to Rx and Tx

I am using Arduino Uno and using SIM800 GSM GPRS modem. I am connecting Arduino directly with SIM800 GSM/GPRS modem. I already read manually about GSM like how much power supply it needs and what ...
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3answers
6k views

What components I need for a small GPS tracker

I am new to Arduino and want to create a graduation project for my university. I am thinking to create a GPS tracker that can be attached to a cloth to track kids, for example. So the requirements for ...
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2answers
1k views

GSM GPRS module not getting any output from Rx , Tx

I am using a SIM800 GSM/GPRS module. I connected it using 4 wires: Vcc 3.7 volt (2 amp supply), RX and TX and GND. Whenever I try to send a command it shows me nothing. Here is my code. //Serial ...
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3answers
9k views

Multiple If statements

I am using following code for my arduino project in which i have to control a dc motor using arduino uno via text messages. my question is that i have used multiple number of 'If' statements and only ...
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3answers
650 views

Can I use these cheap GSM module with arduino?

I found two cheap GSM module on ebay but didn't know that I can use them with Arduino or not. Will you help me please? Here are the link- http://www.ebay.co.uk/itm/Smallest-SIM800L-GSM-Module-Micro-...
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2answers
2k views

Can I use GSM and GPS modules at the same time?

In my project I want to retrieve the Latitude and longitude and then transmit to a cell phone through GSM module. But the GSM as well as GPS modules uses the same pins i.e. Tx and Rx, so is it ...
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2answers
1k views

SIM900 Shield read only sms headers without text

I enable messages about new SMS AT+CNMI=2,2,0,0,0 OK and when received sms, output like this. +CMT: "+79XXXXXXXXX","1","15/09/23,01:34:03+24" Test But when I read message, output only before <...
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1answer
1k views

Why are some of my GSM modules not taking commands?

I posted a couple weeks ago about having a GSM error. I moved past it and the code seemed to be working on my GSM module (I think a SIMCOM). But then I needed to create some more systems and out of a ...
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4answers
5k views

SIM900 AT command HTTP GET request not show the web page

I build a simple HTTP GET request by SIM900. Here is it: -----1----- AT+CSQ +CSQ: 25,0 OK -----2----- AT+CGATT? +CGATT: 1 OK -----3----- AT+SAPBR=3,1,"CONTYPE","GPRS" OK -----4----- AT+SAPBR=...
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1answer
613 views

Problem in SIM900 GPRS connection

I make simple code to read web page by ITEAD Gboard. Here is my code: Serial.write("\nStarting..........\n"); mySerial.print("AT+CSQ"); delay(1000); while(mySerial.available()!=0) Serial....
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1answer
2k views

Ethernet to Cellular Modem Possible? | GSM + Ethernet + Arduino

Is it possible to combine an Arduino µC with a GSM shield and an ethernet shield such that a device connected via ethernet to the Arduino has internet access over the GSM network? I have a system ...
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1answer
1k views

How does arduino fetch instruction string from sms and execute?

I am working on a project in which i have to send commands using sms (GSM shield) to the arduino uno to control dc motor. What i want to know is that how can i define the instruction strings that i ...