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Questions tagged [gsm]

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

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SIM800L not responding to AT commands

I am using SIM800L module the module. I am new to GSM modules, so I've searched for the basic to use the GSM with the Arduino. this is my code. #include <SoftwareSerial.h> SoftwareSerial ...
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-2 votes
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15 views

SIM900 GSM SHIELD with nodeMCU pins [closed]

Does anyone knows how to pin out nodeMCU/ESP8266 with SIM900
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0 answers
20 views

Gsm 900A is blinking every 1 sec even after a while

I have a gsm module 900A model together with arduino. I put them together following the instructions provided to me by the https://www.google.com/amp/s/www.instructables.com/GSM-SIM900A-With-Arduino/%...
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31 views

How to capture the responses of GSM SIM800L whenever an AT command is sent?

I am using sim800L and nodemcu esp32-S. I would like to capture the "OK" or "ERROR" response of the sim800L whenever I try to send an SMS message using the sim800L and use it for ...
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1 answer
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What GSM module I should use for HttpClient, ArduinoHttpClient, WebSockets etc.?

I need to use some API in my project. So I'm gonna use such libraries as listed in the title? What GSM/SIM module do I need for this purpose? I've checked 800L and similar - it only can use plain http,...
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  • 109
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0 answers
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Advice On Reliability of GSM Module - How To Choose The Right Module And Ensure It Will Be Reliable?

I need a reliable gsm solution for an Arduino. I will be using it in Denmark with Danish broadband. The specific tele-provider has not been decided. It will be used in connection with a Db sensor in ...
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1 vote
0 answers
35 views

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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1 vote
0 answers
35 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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624 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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1 vote
0 answers
362 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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1 vote
0 answers
125 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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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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1 vote
1 answer
123 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 ...
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1 vote
0 answers
52 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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1 answer
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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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2 votes
0 answers
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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2 answers
165 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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1 vote
1 answer
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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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1 vote
1 answer
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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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1 vote
0 answers
45 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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2 votes
0 answers
90 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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1 vote
0 answers
154 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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1 vote
0 answers
207 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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1 answer
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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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1 vote
0 answers
124 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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1 vote
1 answer
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[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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1 vote
1 answer
61 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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3 votes
1 answer
676 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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1 vote
0 answers
27 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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1 vote
1 answer
116 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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0 answers
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MC60E GSM Shield can't connect to Network

I am using a GSM MC60E Shield (Model: https://forum.arduino.cc/index.php?topic=234200.0) on top of an Arduino Mega 2560; the Arduino is connected to other sensors that are not important now. I want to ...
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1 vote
2 answers
950 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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1 answer
530 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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1 vote
0 answers
66 views

Missed call to GSM

I want to give missed call to GSM module; how to do that? Whenever I call to GSM module, after 3 RINGs, it should be disconnected. How to do this? #include <SoftwareSerial.h> String string = &...
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1 vote
1 answer
608 views

SIM800L module on Arduino nano

I am trying to get Arduino nano and SIM800L module working together. I provided the module with the recommended external voltage of 4.0V (documentation states 3.6V - 4.2V) transformed via LM2596. The ...
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-1 votes
2 answers
81 views

Connect 12V 38A battery to SIM800C GSM Module

I have a gsm module that is rated for 12V and 1A. And I also have a drone Battery that is 12V and 38A. Would it hurt the gsm module If I connect it to this high power Battery? I heard It's voltage ...
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1 vote
0 answers
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Remote camera with Arduino MKR GSM

I'm interested in making a remote camera that could take and process still photos and send over cellular data using the Arduino MKR GSM. Is this feasible with the specs of the arduino? If it is does ...
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  • 111
1 vote
1 answer
52 views

Can I safely connect my A6 GPRS module to this 5V 2A phone adapter

I have an A6 GPRS module, and my Samsung phone power adapter has output of 5V and 2A. But it also says 9V and 1.6A My Phone's Adapter 👆 So would it damage my A6 GPRS Module if I plug this to it via ...
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2 votes
1 answer
225 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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2 votes
1 answer
56 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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1 vote
0 answers
183 views

SIM800C status LED not blinking

I am using an Allwin HW-537 SIM800C module. I am also using a 3.7V 2200mAH ICR18650-22F battery which discharges about 4-5 amps according to the datasheet. However, I am unable to get the status LED ...
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1 vote
0 answers
41 views

Send message to multiple number

sim.println("AT+CMGS=\"+91xxxxxxxxxx\"\r"); I don't want to write this. I want to write mobile number on serial monitor in Arduino and on that number, i want to send message. how ...
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0 answers
121 views

Send data from GSM module to cloud server like firebase

I am trying to search for anything to send my sensor data from Arduino + GSM SIM900A to a cloud server, preferably firebase. Does anyone know how can I achieve this operation to firebase or any other ...
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1 vote
0 answers
36 views

GSM900A module is not connecting to the network

My GSM900A module is not connecting to the network. IT continuously blinks(1 sec). The power was given by the Arduino Uno board. Then I tried connecting an external battery(4.2V , 4200mAH). But it ...
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1 vote
0 answers
20 views

which kind of data are store If i terminate the call in sim800?

I'm working in SIM800 for DTMF based project. I want to know which kind of data are stored in the buffer during termination of call in SIM800. How to find if call was disconnected in SIM800? Also ...
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  • 31
1 vote
1 answer
131 views

Send JSON body with SIM900 board

I'm trying to send JSON, but i'm not able to set Content-Type header. Other commands are successful: [23:49:41:856] AT+SAPBR=3,1,"CONTYPE","GPRS"␍␊ [23:49:41:899] ␍␊ [23:49:41:899] ...
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1 vote
1 answer
115 views

How do I connect 4 or more Arduinos to a single shared GSM Module?

Is it possible to connect 4 or more Arduinos to a single GSM Module.? All the Arduinos need to send SMS at a specific time daily. How do I make sure thet don't time collide with each other, other than ...
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1 vote
1 answer
540 views

Arduino Uno + SIM808 EVB 3.2.4 not working properly?

So recently I found this tutorial online about the SIM808. It looked super cool so I ordered the sim808 evb 3.2.4 off amazon. Hooked up the module and connected the RX (11) and (10) TX pins. Here is ...
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1 vote
0 answers
66 views

SIM900 module connects then disconnects from carrier soon after

I have an Arduino Mega 2560 with an ESP8266 built into it, and a SIM900 shield, which I am building a project with. The shield is powered by an external adjustable 3-12V, 2A supply set at 6V so power ...
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1 vote
0 answers
85 views

Help with reading and storing data from sim module

I'm using a sim800C module and an Arduino Uno. I want the code to send back an SMS to a number which sends it the password. So, if the sim module receives 'abcd' I want it to send back an SMS, saying '...
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