Questions tagged [gsm]

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

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1answer
228 views

How Server request happens?

Can somebody explain the below code, like how the server understands, how the request goes to the server from the below code. if (client.connect(server, port)) { client.print("GET /abc.txt"); ...
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1answer
155 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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2answers
357 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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1answer
4k 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
151 views

Is there any way to catch the response of SIM800L after sending the at command?

I am using sim 800l with arduino. I am successfully sending AT command from arduino, not in serial monitor but I am unable to catch the response after each successful command execution if its ok or ...
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1answer
75 views

SIM808 does not support SSL related AT commands

I am using a SIM808 module. It's working fine with normal MQTT over TCP, but does not work when trying secured MQTT. I sent AT+SSLSETROOT="C:\USER\HENRY_SSL.CRT" to set the root certificate ...
2
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1answer
53 views

How to increase the frequency of data transmission of SIM900A GSM Module connected to Arduino Uno?

I have a SIM900A GSM Module hooked onto an Arduino Uno board. The Arduino is connected to a MPU6050 Accelerometer which is constantly monitoring data at 1 second interval. I am trying to transmit the ...
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1answer
730 views

Is is possible to hook up an SD card and a GSM/GSRM module?

Is it possible to hook up a GSM/GSRM module AND an SD card at the same time to an Arduino Uno, or any Arduino? I want to build a cellphone to read off the buttons that are being dialed into it for a ...
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1answer
11k 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() {...
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1answer
394 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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1answer
108 views

Can I use GSM and Data Logger Shield at the same time on one Arduino?

Me and my classmates are trying to make an arduino base project where we will be using sensors, GSM, and Data logger shield. We want the arduino to store the data collected and at the same time send a ...
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1answer
60 views

Not receiving the complete messange sent by SIM900

I need help with SIM900 and Arduino Mega. I do not receive the complete message that I send from my phone. (Arduino Mega _ SIM900 _ Alimentation 9V/2A) Message sent: 1234567891234567890 Message ...
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0answers
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Low power microcontroller with gprs/gsm and maybe gps on board

Good day to ya all. I have a general question and a potential problem to solve. My plan is to make a device which will work on 2 li-ion batteries. The purpose of this board is to take data from 3/4 ...
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2answers
644 views

SIM A9G: +CME ERROR: 53 failure

I'm using a SIM A9G. When I send HTTP GET command from the serial monitor, it responds. But, it doesn't work when included in the code. #include <SoftwareSerial.h> SoftwareSerial myserial(8, 7);...
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1answer
302 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 ...
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0answers
105 views

How to connect Nodemcu ESP-32s and GSM SIM800L

The code that I use: #include <SoftwareSerial.h> //Create software serial object to communicate with SIM800L SoftwareSerial mySerial(16, 17); void setup() { //Begin serial communication ...
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0answers
23 views

SIM900 AT+CCID ERROR

I have my SIM900 connected to a 12v 2A power source, I have inserted my sim card changed it to 3G/2G(autoconnect) ( I did research it to know wheteher it is possible and it turns out it is, the only ...
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1answer
678 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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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
153 views

Getting location working on SIM800L with TinyGSM?

Hey Arduino enthusiasts :) I have purchased a LilyGo T-Call board. Which has a Esp32 processor and a SIM800L GSM module. For my project i want to send location data over the 2G cellular network. I am ...
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1answer
1k 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 ...
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0answers
69 views

Power Arduino MKR GSM 1400 via VIN

I am working on a project with Arduino MKR 1400 GSM and I would like to power the arduino board using an external power source (https://www.reichelt.de/raspberry-pi-netzteil-5-1-v-3-0-a-usb-type-c-eu-...
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0answers
15 views

reading data from server arduino and gsm900a

I am facing a problem in reading data from thingspeak server after each AT command, I get the right response from the gsm However, after AT+HTTPPARA = "URL","thingspeak.com/channels/...
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2answers
118 views

A9G gsm module not displaying message body after receiving SMS

I am trying to receive an SMS on my arduino and print it out to the serial monitor. I am using the A9G gsm/gps module for doing that. Here is the code for it #include <SoftwareSerial.h> //...
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3answers
2k views

GSM and GPS module don't work together

I am trying to create a project which involves getting latitude and longitude via GPS Module and send it via GSM Module. My problem here is that individual code is working perfectly. However, if am to ...
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2answers
2k 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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0answers
35 views

Interfacing IOT- GA6 to Arduino

Good evening guys, Looking for any help on interfacing the above GSM/GPRS module with arduino. Connections: VCC and GND of module- separate power supply, 5v 3A URX to pin 2 UTX to pin 3 Common GND ...
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1answer
2k views

Arduino Based Home Automation System

I am working on my project of home automation system using Arduino GSM SIM900 & four channel relay module. I am facing a problem in my code. Can any one help me on this, SMS is receiving but its ...
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1answer
189 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 ...
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1answer
598 views

How to update a text file dynamically

I have Two Arduinos, One with the help of sensors it will dynamically updates in to my server database. Other Arduino, reads the stored contents from the server database and sends sms to phones. Now, ...
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1answer
97 views

How to fix serial communication problem between Arduino UNO and sim900A

I've connected the arduino UNO to the sim900a. But after checking the serial communication between the two I keep getting these output. Here is the connections and code that I used #include <...
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3answers
5k views

LCD display weird characters

Im a newbie. I have a problem with displaying text in LCD (16x2). It shows incorrect message in the lcd. Here is the code and the picture that gives the wrong output : Kindly help Thank you. #include ...
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0answers
30 views

i want to combine below two codes [duplicate]

*****1st code int sensoroutput = 3; // the analog pin connected to the sensor int sensorinput = A0; int THRESHOLD = 100; void setup() { pinMode(3, OUTPUT); pinMode(A0, INPUT); // this ...
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1answer
74 views

How to connect SIM7100A to Arduino?

I've been searching for how to connect a SIM7100A module to an Arduino (Uno or Mega), but I haven't been able to find any posts anywhere, nor videos nor any kind of documentation that shows how to do ...
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1answer
61 views

How to send a message to my phone that my Arduino system is on when turning on my Arduino

i have installed a GSM shield on the Arduino to create security alarm system using PIR SENSOR when ever there motion I will receive a call to my phone. but i want to add also a line of code which can ...
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1answer
44 views

Updating mysql data using SIM900 and Arduino

Thanks in advance for your kind support. I am not an expert but have little understanding of concepts and trying to integrate various things to get some useful projects for my purpose. I want to ...
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2answers
2k 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
497 views

[SOLVED]SIM7600 Module Power up by Arduino Uno doesn't work

Am using SIM7600X 4G HAT with Arduino Uno I follow to manual to Power up the module and it works well, The NET light flashing. But when I connect to Arduino Uno and use DigitalPin 2 write (High -> ...
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0answers
39 views

Arduino MKR GSM 1400 project - Establish call - Wait and hang call

I am implementing a GSM project using the Arduino MKR 1400 GSM board and I would like to achieve the following: Establish a call to a specific number, wait for a certain amount of seconds and then hag ...
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2answers
1k 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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0answers
60 views

How to address +HTTPACTION:0,600,0 Not HTTP PDU response

I am using the SIM900A gsm module and trying to connect with my site using a GET request. My issue is that when submitting AT+HTTPACTION=0, I receive a status the response as +HTTPACTION:0,600,0. In ...
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0answers
98 views

sim808 init error when trying to use DFRobot to get gps

I'm using "mega 2650 pro" Arduino with SIM808 BK-808 V-3.1 and I connect the vcc for the sim808 to 5volt pin in the arduino, and the arduino connected with laptop usb. and I add a sim to the ...
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0answers
153 views

SIM808 GPS+GSM Vehicle Tracking using Maduino Zero SIM808 GPS Tracker V3.5

I'm learning about GPS technology and I bought the Maduino Zero SIM808 board V3.5 to design a vehicle tracker. I have found source code for the project online. After I upload the code to Maduino ...
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0answers
102 views

Arduino unable to wake up using interrupt after sending SMS

my use case is that I am building a distance sensor using Arduino Uno. The idea is when the distance is between a threshold, an SMS is sent from the device. I am using DS3231, SIM800L, and HCSR04 for ...
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1answer
52 views

Any way a GSM sim 900 can still work (USA)?

so I’m pretty new to arduino and have been working for weeks on a GPS tracker using a sim 900 and a knock off neo 6M. All my code seemed to be working but for some reason I could not get the sim900 to ...
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1answer
58 views

[SOLVED]how to send command to Gsm module from Arduino via serial port

Am using SIM7600X 4G HAT module (GSM) and Arduino Uno after I start the module and Arduino, I receive data from Gsm module but I can't send any command to it. On my Arduino board when I get data RX ...
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5answers
12k 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 ...
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0answers
25 views

Serial.available is giving data even input data is not coming

Dear friends I have written a code to identify the caller and send a reply SMS to them using sim 800L and pro mini. My program is to identifying the caller number but continuously sending the SMS in ...
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7answers
19k views

How to send AT command to sim800l with SoftwareSerial

I have SIM800l module connected to Arduino and I'm trying to initialize it in my setup function with this code: #include <SoftwareSerial.h> //SIM800 TX is connected to Arduino D8 #define ...
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1answer
85 views

DFRobot GSM / GPS shield with UNO init error

Apologies, but I have little experience of Arduino etc. Has the "Sim808 init error" been resolved anywhere please? I have tried every example I can find including the ones on these ...

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