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Questions tagged [gsm]

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

113 questions with no upvoted or accepted answers
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2answers
937 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 ...
2
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0answers
820 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/...
2
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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 ...
2
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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
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 ...
2
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0answers
977 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 ...
1
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1answer
62 views

Arduino Communication with Sim 900

Im using an arduino uno and a sim 900, the simcard is setup and working as I can make a phone call to it and it rings. The sim 900 is powered via the power jack and the uno is currently powered using ...
1
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0answers
38 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 ...
1
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0answers
876 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....
1
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0answers
1k 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 ...
1
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0answers
248 views

GSM serial get event or read the whole input?

I am using an Arduino Uno with GSM shield, trying to read some SMS. Here is my code. #include <SoftwareSerial.h> SoftwareSerial SIM900(7, 8); char incoming_char=0; void setup() { Serial....
1
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0answers
227 views

No reply from GSM module

I have an arduino due sending and receiving data from a server using a GSM module (UBLOX SARA-U270). The issue I am having with it is that after a period of time working correctly the module stops ...
1
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0answers
268 views

GSM librarys Software Serial conflicts with I2C pins 2 and 3 for Arduino Micro

The GSM library apparently uses the Software Serial library to perform the communication. The Arduino Micro specified pins for the serial connection to the GSM is pin 2 and 3 (doc says, but see def of ...
1
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0answers
517 views

Sim900 data logging through Sparkfun

I've been trying to upload data to data. Sparkfun's servers using HTTP commands, but I've hit errors every time I try. This is my code: #include <String.h> void setup() { Serial1.begin(...
1
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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 ...
1
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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 ...
1
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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 ...
1
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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 ...
1
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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 ...
1
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0answers
489 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 (...
1
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0answers
523 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'...
1
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0answers
771 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 ...
1
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0answers
466 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.
1
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0answers
958 views

How do I use I2C from an Arduino Uno when I have a GSM shield mounted?

This may be an extremely obvious question but I don't seem able to find a definitive answer. I have an Arduino Uno and a Sim900 GPRS/GSM shield fitted on top of it. I had I2C working on the Arduino ...
1
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0answers
383 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?
1
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0answers
247 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
1
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0answers
321 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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0answers
436 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.
1
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0answers
528 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 ...
1
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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/...
1
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0answers
431 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....
1
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0answers
214 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 ...
1
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0answers
688 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 ...
1
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0answers
486 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/...
1
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0answers
199 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
vote
1answer
8k views

Sim900 error on AT command AT+HTTPINIT

I want to send data to my php server using sim900 module but I am unable to initialize http service on sim900. code: #include <SoftwareSerial.h> SoftwareSerial gprsSerial(8, 9); void setup() {...
0
votes
1answer
26 views

Somewhat Obfuscated Serial With SIM800L and Uno R3

I am successfully communicating with my SIM800L from my UNOR3 aside form some errors. But the biggest problem is with the serial monitor. Responses from the SIM800L are somewhat obfuscated in that ...
0
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0answers
21 views

can't interface SIM900 GSM Module with Arduino Mega

I am trying to interface SIM900 GSM Module with Arduino Mega. When I send AT command on COM port in carriage mode then its not sending 'ok' back so I think the interface is not successful. Here is the ...
0
votes
0answers
9 views

SIM900A No response at all

I am unable to communicate with the SIM900A (model#:s2-1040W-z091d). I am supplying with an external psu with 5v 1.5mA to the SIM900A connection (SIM900A)RX to (Arduino)PIN3 (SIM900A)TX to (...
0
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0answers
14 views

Weird issue with AT+HTTPPARA using arduino uno and sim800l

Right now I'm working on a project that includes gathering data from multiple sensors and sending it to the database with a simple php script. For now I've got two seperate fully working programs - ...
0
votes
0answers
14 views

SIM868 does not give GNSS location

I bought SIM868 breakout board with GNSS support. https://www.aliexpress.com/item/33013782111.html However, I can’t get coordinates using standard at-command AT+CGNSPWR=1, AT+CGNSTST=1, etc. I get “+...
0
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0answers
21 views

Nodemcu & GSM module & CLIP problem (CLIP line not always appears on the serial connection)

I'm working on phone-controlled car park gate. Trusted employees numbers are saved on SIM card/hard coded in program. So the idea is, if a trusted person calls the "gate number" ; Nodemcu will ...
0
votes
1answer
31 views

SIM800L GSM module is not working

I'm testing SIM800L GSM module with Arduino UNO and module is blinking 3 times every 15 seconds or sometime every 45 seconds. Why this is happening? In serial monitor it shows Message Sent ...
0
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0answers
17 views

Receive Data On Arduino In Remote Location

My project is an Arduino with a sim card that's connected to a battery that acts as a switch however the Arduino's location is remote and I'm not sure if there is data coverage. The data I am sending ...
0
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0answers
21 views

Arduino UNO Restarts when HTTP API called with 500 Bytes response

String get_data() { String resData =""; char msgs[450]; numdata=inet.httpGET("myserver.com", 80, "/call.php?id=1&q=1&code=1001", msgs, 450); resData = parseMessage(msgs,numdata); ...
0
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0answers
15 views

How to extend gsm buffer?

Haii All, I am using gsm SIM900A module with arduino uno. I am trying to send some data from that to server. When i am writing some commands for that, let's say i have written 3 commands before. But ...
0
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0answers
39 views

Arduino Uno + Sim808 GPS dont work with GSM

I am trying to get GPS data and pass it through GSM (Http Get Request). The GPS codes part works fine alone, also HTTPRequest part lonely. But when i use them together , the module don't get GPS data ...
0
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0answers
35 views

Arduino malfunction tmrpcm while used digitalRead

I am programming Arduino UNO for this functionality: with use of SD card reader module and SIM900 GSM/GPRS shield I am trying to: 1. Pick up incomming call, play message from SD file and after the ...
0
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2answers
90 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 ...
0
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3answers
31 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 ...