Questions tagged [gsm]

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

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11
votes
2answers
9k views

Getting the contacts/ storing contacts to SIM card

I have the GSM shield and is there any ways to get the stored contacts on the SIM card? It seems that the GSM library does not support writing data onto/ reading data from the SIM card? My aim is to ...
9
votes
4answers
1k views

Which shield to use for GPRS?

I'm planning to build a device that would read some sensor data and send it via GPRS, eg. once per day. (Not that original, yeah.) But my problem is choosing a GSM/GPRS shield. The official ...
7
votes
2answers
13k 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); ...
7
votes
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
votes
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'...
5
votes
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 ...
5
votes
3answers
2k views

Multiple GSM shields on one Arduino

I am looking for a way to listen for received text messages on multiple numbers. When I came across the Arduino and its shields, I thought to myself this might be the perfect way to do just that. One ...
5
votes
2answers
17k views

How to receive data from my server database to a variable in my Arduino?

I am learning to work with the client - server communication. I am able to communicate with my server and able to store values in the table. But I want to receive one of the specific data from the ...
5
votes
4answers
9k 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 ...
5
votes
2answers
10k views

Connection problem with Arduino Mega 2560 and GSM shield ( official M10)

As I don't want to stack the shield over the mega 2560 board, I try to connect only the pins that used for GSM communication. Here are my connection: Pin 3 on Mega <==> Pin GSM Rx on Shield Pin ...
4
votes
3answers
4k views

Arduino shield stacking

I have an Arduino GSM Shield mounted on an Arduino Uno. Can I stack this GPS shield above Arduino GSM shield? Will there be any pin configuration problem? In GSM Shield hardware pin’s configuraton ...
4
votes
5answers
11k views

MQTT client on Arduino + SIM900

I have used the pubsubclient library for Arduino for communicating with an MQTT broker in the past, however the library works only with Ethernet connecction. I need to use GSM in my application and am ...
4
votes
1answer
129 views

Compatibility between shields

Despite that I am new to Arduino, I am tasked to invent a serious alarm system and I chose Arduino. I study electronics, but virtually I am a software programmer and C is my area of expertise. I ...
4
votes
2answers
1k views

SIM800L and Arduino Sleep - getting whimsy Serial output after 5 calls

i'm working on project where i'm trying to achieve that arduino parse caller ID so i can use it later to send SMS with sensor reading data. Somehow i made that code (with much googling) and it works ...
3
votes
3answers
13k views

Cheapest Arduino GPRS or 3G solution

I am looking at creating a fleet of low power, Arduino driven devices. I would need some kind of GPS on them all (or could triangulate through phone network?) plus a connection to the internet - just ...
3
votes
2answers
5k views

Arduino Mega + SIM808 GSM + GPS Module + Program Switch ON without pressing Push Button?

I am new to IOT and tried out integration and a small test code with an Arduino Mega + SIM808 + GSM + GPS Module. It works fine with the SIM808 Library. My requirement is to put it in an enclosure, ...
3
votes
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. ...
3
votes
1answer
762 views

Using AA batteries to power Arduino and GPS unit

I'm more of a software guy, so I need your help to figure out the power issue with my Arduino. What I would like to do is using a GSM/GPS unit (Ai-Thinker A7) with Arduino Nano as a car tracking ...
3
votes
2answers
13k views

Is the SIM900 3G? Or is the SIM900A able to connect to 3G?

I would like to state that I am not familiar with the whole cellular connection thing. But I was wondering if the SIM900/or/SIM900A is 3G and will work with PTel Mobile. I need this Arduino to be ...
3
votes
1answer
3k views

How to read a Text file from server and store to a separate variable?

I am working on reading a text file from the server, using http://arduino.cc/en/Reference/GSMClientConnected. It gives me this code: char path[]="/asciilogo.txt" I want to store only the contents ...
3
votes
1answer
265 views

Why is the GSM shield so expensive? [closed]

I've been doing some Googling for GSM shields and their prices and frankly I don't understand why they are so expensive on average. The official one sold by Arduino is 71 euros for me (I live in ...
3
votes
1answer
836 views

Unable to receive SMS on Android

I have a GSM/GPRS shield for Arduino. It uses a SIM800 from SIMCOM. I've done several projects using it. Previously I used to send SMS from the same module. which were delivered appropriately. Since ...
3
votes
1answer
838 views

Does SMS format depend on the sender's mobile?

I want to read the SMS using Arduino and GSM module, I want to perform conditional programming based on the received SMS. What I found really interesting is SMS format is different if I send message ...
3
votes
0answers
904 views

GPRS/GSM SIM900 Shield not working with Arduino

I have a few questions related to GPRS/GSM SIM900 Shield not working with Arduino. To keep it short I have a list of concrete questions: Is the Arduino GSM library compatible with the Geeetech GPRS/...
3
votes
0answers
6k views

Arduino GSM receiving text and then storing value as a variable in code

I am using an Arduino Mega board with a SIM900 GSM. My goal is to be able to text the GSM with a value of two digits (ex: 79) and then store that value as a variable in the code. I know how to set ...
3
votes
0answers
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 ...
3
votes
0answers
789 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
3
votes
0answers
1k views

(Arduino + official GSM shield + ultrasonic HC-SR04 sensor) inaccurate measuring

I'm using an Arduino Uno, 1.0.5 r2 version of the IDE with and ultrasonic HC-SR04 sensor for measuring a tank water level. I want to send the data obtained over internet using the official arduino GSM ...
2
votes
3answers
12k views

SIM808 module GSM working fine, GPS not working (No GPS ready message on power on)

I powered on my SIM808 module. It showed me following output: RDY +CFUN: 1 +CPIN: READY Call Ready SMS Ready It supposed to show GPS ready also. I sent AT command and return ok. However ...
2
votes
1answer
8k views

Which pins of an Arduino UNO can be used as Tx and Rx pins for connecting to GSM GPRS SIM 900A

I am using Arduino UNO and SIM 900A. Pins 0 and 1 are used as TX and RX. Is it possible to use any other pins?
2
votes
1answer
426 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 ...
2
votes
2answers
12k views

SIM800L not registering to network

I am using SIM800L module. I am new to GSM modules. I have searched in many web sites about SIM800L, every where they mentioned baud rate 9600 for SoftwareSerial but it is not working at all in my ...
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 ...
2
votes
3answers
385 views

SIM800L HTTP request is not reliable

I have a question regarding SIM800L and HTTP GET request. I'm using this https://exploreembedded.com/wiki/Setting_up_GPRS_with_SIM800L simple code to communicate with SIM800l with AT commands. To ...
2
votes
3answers
11k views

How to send messages to multiple numbers using Arduino uno & SIM800 module?

I am using following code to send message using Arduino Uno & SIM800 module. But I need to send same message on multiple numbers then what changes should I make in my code. const int buttonPin = ...
2
votes
1answer
158 views

GSM and NFC not working together

I have an Arduino Uno board, Seeed Studio NFC shield v2.1 and, an Arduino GSM shield stacked UNO -> NFC -> GSM, therefore, all the wires are going into pins in the GSM. I have successfully created a ...
2
votes
2answers
6k views

Arduino 4G LTE Shield

Is there by any chance a shield that can take an 4G LTE compatible SIM card activated by a carrier and establish a connection?
2
votes
2answers
2k views

Which GSM-shield is most efficient for GPRS communication?

I tried Google, I tried a bunch of forums and I searched here. This question needs a final answer: Which GSM-shield is most efficient for GPRS communication? Since Arduino is the amateurs best ...
2
votes
2answers
359 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 ...
2
votes
2answers
446 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,...
2
votes
2answers
12k views

SIM900a Mini Modem, IMEI 0, help with TX RX pins

I have Simcom SIM900a GSM (SIM900a Mini DEV Board v3.9.2) and I am interfacing it with Arduino UNO. I have no idea how to connect SIM900a to Arduino UNO. What I did now is: I connect the following ...
2
votes
1answer
2k views

Strange characters after typing an AT command in serial monitor

I'm trying to test AT commands (I am working with an Arduino Uno and a GSM/GPRS SIM900 shield; my system is ubuntu 14.10) . Yesterday when I was testing , all ran well.. For example after typing AT+...
2
votes
1answer
1k views

How to connect GPS Neo-6M module to GSM Shield SIM900 V2?

I'm doing my final year project, My project is based on "Arduino Real Time Gprs/Gsm & GPS Tracker". So Now I have purchased the hardware components such as: Arduino UNO R3 GSM Shield ...
2
votes
1answer
378 views

Sim800L's library can not compile on Arduino Due

Sim800L's library can not compile on Arduino Due. Is there any way to create a library for Arduino Due? #include <Sim800l.h> #include <SoftwareSerial.h> Sim800l Sim800l; char* text; char*...
2
votes
1answer
567 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?
2
votes
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 ...
2
votes
1answer
914 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 ...
2
votes
1answer
150 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 ...
2
votes
0answers
40 views

How can i tell the power status of a GSM900

What I am after is a reliable way of telling whether the GSM900 shield is powered up or not. "Obviously" the shield power is the constant green light. But i'm talking about the red light on the ...
2
votes
0answers
2k views

Turn led on after ringing once, off after two rings when hung up SIM800

I'm trying to make something that has one led and a gsm module which is SIM800L, I'm using seeeduino GPRS library. What I'm trying to do is that when I call the GSM module and hung up after ringing ...

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