Questions tagged [gsm]

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

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512 views

SIM 900 stop after 1'5 hours; what's wrong?

I have a Gboard module (from Itead) configured to recieve data from Xbee sensors, and log data to a server DB on inet (via GPRS). This module is programmed with Arduino IDE. I turn on the module (...
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553 views

Make a GET Request GPRS

I'm building a weather station that sends the data to a webserver via GET request. I was wondering if you guys can look into my code and help me. I looked all over the internet and can't find what'...
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1answer
484 views

Venus GPS + Arduino. Kill 3.3V TX during sketch upload

I am playing around with the Sparkfun Venus GPS. I followed this tutorial to get started. In here the author states that you should Upload the following sketch to your Arduino BEFORE making any ...
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782 views

send SMS for 1 time with arduino GPRS SIM900 if an iput is HIGH (4 Digi inputs)

I faced a problem to send 1 SMS if an input is HIGH,and if it is LOW==> no SMS to send,if LOW to HIGH==> send 1 SMS. this code not working,just sent SMS when I turn the GPRS on,and after nothing is ...
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472 views

GSM shield for Arduino Due

Is there any good quality GSM shield compatible with Arduino Due? I have searched for gsm shield but it seems all shields have operation voltage 5v. Any suggestion would be helpful.
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391 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
311 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
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0answers
442 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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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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1answer
954 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
1k views

Send HTTP get request from GSM SIM800c and Arduino

I am trying to send Get request from my GSM Module but after connecting to server it is not responding any thing #include <SoftwareSerial.h> SoftwareSerial myGsm(2,3); void setup() { myGsm....
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446 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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887 views

Missing character when introducing delay in the code

I am using the following code for reading any incoming message, and doing something after decoding the incoming string. There is a delay of 10sec in the code. When this delay is not introduced in the ...
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2answers
9k views

How to jump outside the loop? in below Programme how to use goto or any other Jump related Programme

const int analogPin1 = A1; const int analogPin2 = A2; const int analogPin3 = A3; const int ledPin = 13; const int ledPin2 = 7; const int thresold = 400; unsigned int x1, x2, x3, fault = 0; void setup()...
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1answer
87 views

Is Gsm antenna effect on microcontroller working?

in my embedded system I used patch antenna and Atmega 328 microcontroller,but somehow it causes the abrupt function of a microcontroller or reset. how can it be solved?
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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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2answers
3k views

Can I charge a 4.2 V battery with a 5 V adapter? [closed]

Can I charge a 4.2 V battery with a 5 V adapter without damaging the battery?
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4answers
12k 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
178 views

Arduino MKR GSM 1400 fails to start up without Serial Monitor [duplicate]

This question is similar to another question, but I have added more details. See: MKR GSM 1400 Works only when connected to computer. I have designed and built a custom board into which I plug an ...
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1answer
121 views

GSM module not working after power off

I am making a project on gsm module(sim 900a unofficial shield), when I will send a SMS led will turn ON. after uploading code, module works fine, and led turned ON after sending message. But when I ...
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1answer
92 views

Sim900a AT+HTTPREAD does not get fully answer

changed the firmware on SIM900B try to send get request http://dummy.restapiexample.com/api/v1/employee/1 AT+HTTPACTION=0returned +HTTPACTION:0,200,98 but, when I try to read (AT+HTTPREAD or AT+...
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1answer
56 views

Is there a simple HTTP(S) library that doesn't rely on WiFi?

I'm trying to implement a Mobile Network (only) for the ESP32 using Arduino IDE. So to be able to connect to website up/download files etc. I need to be able to handle various HTTP PUT/GET/POST ...
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2answers
441 views

Gsm Sim800l Module

I am using below code for send sms but SMS Sent sucessfully but save in SIM memory & not able to see message text : serialSIM800.write(“AT+CMGF=1\r”); //sending SMS in text mode delay(1000); ...
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1answer
2k views

Arduino GSM Shield NET and STATUS led turn off after a few seconds

#include <GSM.h> // PIN Number #define PINNUMBER "" // initialize the library instance GSM gsmAccess; // include a 'true' parameter to enable debugging GSMScanner scannerNetworks; GSMModem ...
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1answer
522 views

Arduino Mega 2560 with SIM808 module - Incomplete SMS response

I have this code to read a SMS: String read_SMS(int index) { Serial.println("--START READ SMS POSITION" + String(index) + "--"); delay(400); sendATcommand("AT+CMGF=1", "OK", 1000); // sets ...
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1answer
946 views

Does the SIM800L works in the US?

I want to know if the SIM800L works on US soil? I can´t get it to work on the H2O network! Does it work wit ATT or I only need the APN settings? If so what are the commands for data connection and ...
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1answer
370 views

Utilizing 3G/4G connection as gps

Is it possible to get GPS data without using a GPS, but instead using the internet provided from a 3G or 4G connection to get GPS data? Maybe if you used the HTML5 geolocation API somehow? I have ...
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1answer
68 views

Arduino sketch unexpected behaviour

I am currently in a arduino project to read some parameters from another microcontroller serially and the arduino is supposed to transmit these serially to dweet.io cloud. I use SIM900 modem for this. ...
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2answers
420 views

What is more power efficient: GPRS or SMS for a GSM sim Arduino application?

I have a GSM shield for my arduino and am wondering the most efficient way to receive and send data to the cloud. The specific project I am looking to accomplish is starting my car from a web ...
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1answer
2k 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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3answers
750 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

Error AT%13% With GSM/GPRS Shield

I've been trying to control a relay with a GSM shield for an Arduino project. I haven't had any success with either the Software Serial or the GSM library. I've declared the GSM variable in debug mode ...
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2answers
147 views

setup() resets from loop, when I add parameters to http get `?identity=%2B0123456789&identityType=1`

I am trying to call a HTTP GET using my Arduino via SIM900A. When I run the commands manually via the USB port, I am able to get the commands to run. Now, when I put the same sequence on arduino, the ...
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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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1answer
40 views

Arduino : send data via satellite (or other solutions ? without GSM)

I'm a researcher and I'm looking to build a very tiny embedded system. I must to send data from the desert and above the ocean, to do that I think that my single option is to use satellite ...
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2answers
265 views

How to use AT+CFTRANTX command in SIM7100

I am working on a project using pro mini 8MHz/3.3v and SIM7100, I want to know how can I used AT+CFTRANTX command. I am try to read file from EFS and write to SD card via Serial port. I have get some ...
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2answers
102 views

Arduino SIM900 No SMS received

I tried the tutorial in this link https://lastminuteengineers.com/sim900-gsm-shield-arduino-tutorial/ to send an SMS message using a SIM900 GSM shield I completed the section to send AT commands ...
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1answer
51 views

GSM+GPS modules

Say, I need to track a vehicle using Arduino and a (GPS+GSM) module. Though GPS can be used to get Location of the Vehicle(and then sent using GSM), why would we even do it using GPS if we already ...
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1answer
147 views

Sim808 module HTTP Bad request

I have an Arduino UNO and sim808 EVB-V3.02.4. I want to send a GET request to my url but I always receive 400 Http bad request error. #include <DFRobot_sim808.h> #include <SoftwareSerial.h&...
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2answers
1k views

Sim800 FTP Arduino

I've been unable to FTP anything using an Arduino and SIM800L. I have reduced the code as far as possible: #include <SoftwareSerial.h> //Create software serial object to communicate with ...
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1answer
84 views

Wire SlaveReceiver : will the registered function in onRecieve interrupt/conflict with loop block?

I am currently researching on I2C, and I made a configuration that has MasterWriter that transmits data to a SlaveReceiver that will store the data received from Master, into an SD card, and then ...
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1answer
55 views

Split serial monitor output to only save part of the output

This is the output i get from the serial monitor from using a HM10 in . How could i go about splitting the data using arduino uno. I only want to save the last 12 digits before the :- (4CAA0DE091B7) ...
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1answer
576 views

creating HTTP persistent connection, to create 'smooth' data over GSM sending

Project goals Send data over GSM to firebase Fast sampling - need to send 16 bytes every half second to firebase Send data using GET or POST to server with PHP script, that redirect data to firebase ...
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1answer
93 views

Conditions with GSM module SIM900 doesn't execute

I'm executing this code to control a LED with GSM SIM900 message but there are two problems. First, it receives messages sometimes and some times doesn't. The second is that it doesn't execute the if ...
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1answer
186 views

SIM800l doesn't respond on arduino micro

I want my Arduino Micro to interact with my SIM 800 L module. But unfortunately nothing happens, may you can help me figure out where I made a mistake. Here's my wiring: Summary of my wiring: ...
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2answers
83 views

How to perform two tasks in one loop in Arduino?

I am trying to make a weather monitor using Arduino. I want my weather monitor to send me a message of the weather data every 5 hours using GSM sheild. Also, there is an LCD on my weather monitor ...
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1answer
121 views

I want to get incomming call number and compare it

Hello i want to get and compare incomming call number, it works but not as I want. When im calling from good number it print that I was calling form saved number when the number is stop calling i need ...
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2answers
62 views

Servo starts to shake when I added SIM900.begin(19200);

Hello I'm working on this mini project. This project works this way, Whenever someone type wrong password, LCD will display "Access Denied" and send an alert to SMS using GSM module. I used 2 ...
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3answers
266 views

Code getting stuck waiting for GPS Output

I'm basically trying to make a device that pulls the GPS information from a SIM808 and pushes it to a server online via GPRS. I am sorry as I am not good at programming so ive spent days trying to ...

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