Questions tagged [gsm]

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

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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 ...
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1answer
610 views

Why do GPS coordinates fail to save on MySQL database using SIM900?

My project is a vehicle tracking system. I'm using a NEO-6M for GPS and a SIM900 for GPRS. I want to send the GPS coordinates to a MySQL database. I've tested the GPS and it's working well. I've ...
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1answer
1k views

ERROR on SIM900AT comand HTTPDATA (POST method)

Good day community, I have a project which is VEHICLE GPS Tracker and I'm using Arduino Mega, NEO GPS6MV2 and SIM900. I'm using SIM900 to send the GPS coordinates on a web server. I'm using the POST ...
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1answer
455 views

SIM900A showing Starting modem test…ERROR, no modem answer. Checking IMEI…Modem's IMEI: 0 [duplicate]

Edit: Solution can be found HERE I am trying to interface Simcom SIM900A GSM (SIM900a Mini DEV Board v3.9.2) and I tryed interfacing it with Arduino UNO. I have connected as: Pins: SIM900A - Arduino =...
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2answers
8k 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
395 views

Home devices control system using gsm and arduino mega2560

Hi dears I'm trying to do project to control app base gsm control by arduino mega 2560 gsm module SIM900A To send SMS to open Led than reply SMS to give as the status I mean send SMS then I received ...
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1answer
201 views

Problem with Arduino Uno and SIM900 shield logical communication (rx & tx)

The logical communication(rx & tx) between the shield and Arduino Uno doesn't work. Arduino (rx & tx) supply is 0 & 5 V but this is 0 & 2.8 V. What am I to do?
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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
698 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 ...
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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....
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1answer
4k views

Using Arduino GSM with WiFi

I have a project that requires data to be sent online from a moving bus. I am using ESP8266F modules to send the data. I am wondering what Arduino modules to buy that will act as an access point ...
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1answer
161 views

Program NOT responding to loop()- Arduino UNO+GSM + Sensor

I'm trying to monitor the sensor values (range 0-1000) connected to Arduino UNO's 12th-pin. If the value stays below say 500, then it should SEND SMS. I tested the sensor and GSM shield seperately and ...
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5answers
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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 ...
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1answer
913 views

2G/3G vs 4G/LTE Cell Connectivity for Sensor Prototype? [closed]

Would love any advice on Arduino cell connectivity. From what I understand: 2G (GSM/GPRS) is a dying technology. AT&T is shutting down its 2G network on Jan 1, 2017. 2G (CDMA) will have a longer ...
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1answer
257 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 ...
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3answers
4k views

GSM 900A modem not responding to AT commands

I am using GSM 900A modem which requires 5V Supply. I am connecting it to Arduino UNO. I am giving supply to modem by arduino 5V and GND pin. I am connecting RXD pin to TX(pin 1) of arduino TXD pin to ...
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1answer
280 views

GPS Logger Error

I have created a GPS logger code using DFRobot SIM808 library. The tcp code and getGPS codes are working fine. but when integrating the both the code, it failed to upload GPS data to thingspeak. It ...
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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
470 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
2k views

Arduino Mega 2560 with SIM808 module

I have a SIM808 module like this: https://www.banggood.com/SIM808-Module-GPS-GSM-GPRS-Quad-band-Development-Board-For-Arduino-p-1063106.html The output header has 5 pins: GND/RX/GND/TX/VCC and I ...
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1answer
242 views

Design vehicle tracking device

I want to create an Arduino based vehicle tracking device which will be moved into a production board without Arduino later. Right now I have a few questions: What GPS module should I use for a best ...
4
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1answer
127 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 ...
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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 ...
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1answer
1k views

GSM shield 2 - Fully erase memory buffer

I would love to get real developers' input regarding the following issue as I've been spinning my head around it for a while now. What I'd like to do My program receives SMS containing simple ...
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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
161 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
813 views

SIM800L Arduino Pro Mini

I am trying to send an SMS using the Sim800L module and it seems to be unable to connect to the network. When I send the AT+COPS=? command it shows me a list of all the available networks along with ...
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1answer
4k views

How to recieve NMEA data in A7 Gprs/Gsm/GPS Module

This module is special, it has two UART ports, Rx/Tx to send AT commands and another TX GPS. If I send the commands: enter code here AT+GPS=1 // OPEN GPS AT+GPSRD=1// RECIEVER GPS NMEA DATA The ...
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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 ...
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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
1k views

Cannot locate Rx Tx pins on SIM800a GSM module

I recently bought a SIM800a GSM module in India and I am unable to find the Rx Tx pins of the module to make calls using a Arduino duimilanove. The main problem is also that I can't find the data ...
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2answers
888 views

How to use web data from GSM Sim900 to be used as input for Arduino?

I have a GSM Sim900 connected to an Arduino Uno. I'm successfully able to use HTTP READ commands to show data from the web on the Arduino's serial monitor. It is showing complete HTML from that URL on ...
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4answers
460 views

how to get precise value from float variable?

#include <NeoSWSerial.h> //#include <SoftwareSerial.h> #include <AltSoftSerial.h> #include <NMEAGPS.h> NeoSWSerial GSM(2, 3); // RX, TX: Connect TXD to RX & RXD to TX ...
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1answer
585 views

I want to obtain the output of GPS at every 5 secs and store them onto database using Arduino uno,GPS SKG 13BL and GSM module??

I am on a project,in which I need to store the output of GPS from SKG 13BL to a database using Arduino UNO and GSM module.I wrote the following code #include <SoftwareSerial.h> #include <...
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1answer
3k views

Sim800l and arduino pro mini3.3 volt

I want to connect sim800l module with arduino pro mini, I don't find any circuit diagram or tutorial for this. I want a circuit diagram for this.
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1answer
1k views

GSM and Bluetooth modules on 1 Arduino Uno board

I couldn't find anything on this topic. Task: to connect sensors to Arduino board via Bluetooth module, process the received data and then send the data to server via GSM module. Question: Is it ...
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1answer
447 views

Arduino sim900a GPRS POST method asp.net [closed]

Post method is run perfect using postman. error while post the data on server using arduino sim900a module gprs. Arduino code mySerial.println("AT+CGATT?"); delay(100); ShowSerialData(); ...
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1answer
111 views

door protector arduino program

Please check the arduino program given below and help me to find out error. The program is for following hardware. GSM 800 module Arduino Uno board Limit switch(2) We place two limit switch at main ...
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1answer
747 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 ...
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2answers
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 = ...
0
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3answers
182 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 ...
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1answer
709 views

Why I could not read the other sms's except the first SMS?

I have to read the incoming SMS on my GSM module SIM900, and I want to print the sender number and message to the serial monitor. I first configure the GSM module with AT commands and Response() ...
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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 ...
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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 ...
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2answers
4k 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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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); ...
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1answer
2k views

GSM module connected with arduino uno giving garbage values in response

I connected a GSM module with the Arduino UNO. The connections are as follows: Gnd of gsm -----> Gnd of arduino TX of gsm -----> pin 9 of arduino Rx of gsm -----> pin 10 of arduino GSM ...
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1answer
431 views

Insert Variables In AT commandes [duplicate]

I'am trying to apply USSD operation with variable codes, for example this piece of code return my account balance: gsm.SimpleWriteln("AT+CUSD=1,\"*100#\""); i want to change "*100#" to ...
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0answers
267 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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1answer
359 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*...

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