Questions tagged [gsm]

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

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832 views

How Programing the nodeMCU Through OTA using GPRS?

How Programming the nodeMCU Through OTA using GPRS? Hi Everyone I need big help. Actually, I m using NodemCU one of my project. the setup in Remote location, that place dont have a wifi option so I ...
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1answer
741 views

How I can connect module GSM SIM800L?

I bought a GSM module, and I want to connect it with Arduino but I have a problem. I linked GSM SIM800L with regular LM2596 12 V 2 VA I changed tension to 5 V, So far the GSM is ...
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1answer
247 views

GSM library_ all examples ar working except GPRS?

i am using arduino uno and sim808. i connected the sim808 to pins 2,3 on arduino uno and used GSM library. i tested all examples: make and receive a call or messages. the part of GPRS initialization ...
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1answer
198 views

Connection Problems with GPRS Shield

I recently bought a GPRS shield from Seeed Studio but was having issues running the programs described in their documentation. Here is everything you need to know about my shield: Documentation for ...
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2answers
752 views

AI A7 Thinker connection with Arduino

I am trying to connect my A7 to my Arduino Uno but I can't find a way to communicate with it. I searched a lot on the internet to find some schemes but not one of them worked. Here is my actual setup: ...
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1answer
424 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
169 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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1answer
5k views

Arduino: Connect UNO to A7 AI Thinker

I just cannot connect or send AT command from my UNO to A7 AI Thinker module. This is the connection: UNO -> A7 TX -> RX RX -> TX USB || 5V -> External Power ...
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1answer
315 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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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
2k views

GSM SIM900A SMS content not displaying

I am trying to read messages sent from my mobile to a GSM SIM900A module on my Arduino Serial monitor. Neither does the AT+CMGR command nor does the AT+CMGL command display SMS content. I also tried ...
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2answers
1k views

Error while updating ThingSpeak using SIM808

im trying to update ThingSpeak from a SIM808 but I'm getting a network error. Please check below and let me know if there is anything wrong in my methodology. I'm using terminal.exe to send commands ...
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1answer
113 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
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
849 views

how to measure level shock using vibration sensor and arduino

My project title is about crash detection, by using this kind of vibration sensor. When the sensor reads the shock (which is when I knock the sensor) more than 50, it assumes it's a crash and will ...
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2answers
2k views

Clearing arduino serial buffer

How to clear the serial buffer of arduino uno? This is my code to on and off the LED using sms from mobile using gsm module #include <SoftwareSerial.h> int Led=7; SoftwareSerial mySerial(9, 10)...
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2answers
948 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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3answers
21k views

SMS Receiving problem - Arduino Uno and SIM900A GSM Module

My intention is to control an LED according to the content of the SMS received. For example, if the SMS is "ON", turn on the LED and if it is "OFF", turn it off. I referred many sites and got the ...
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1answer
15k views

How to check if a GSM module is working or not?

I wanted to know if my GSM sim800 is working or not. A mishap occured while I was experimenting around with my GSM module and I arduino uno. The link to the module which I bought: http://www.ebay.in/...
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1answer
612 views

arduino and gsm module receive

Can you help me with the codes? I have gizduino(arduino clone), i used the codes in receiving sms from the internet but what i receive is a symbol "y" with two dots at the top. Whats wrong? My gsm is ...
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1answer
7k views

SIM800 or SIM900 library for Arduino

I have a SIM 800L module which I am using to send /receive SMS calls. I just wanted to know whether there is any library suitable for the SIM800 for arduino. I don't need GPRS functionality . I see ...
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2answers
2k views

SIM900 Shield read only sms headers without text

I enable messages about new SMS AT+CNMI=2,2,0,0,0 OK and when received sms, output like this. +CMT: "+79XXXXXXXXX","1","15/09/23,01:34:03+24" Test But when I read message, output only before <...
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1answer
2k views

Why are some of my GSM modules not taking commands?

I posted a couple weeks ago about having a GSM error. I moved past it and the code seemed to be working on my GSM module (I think a SIMCOM). But then I needed to create some more systems and out of a ...
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1answer
904 views

LCD Display Flicker When Arduino Main Board Supply Voltage to GSM Shield Board

I have a 16x2 LCD display that is connected to an Arduino microcontroller. It is working fine but the LCD display flickers when I connect the Vin and GND of the main board to its slave GSM Shield. I ...
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1answer
574 views

Arduino UNO + Arduino GSM Shield + Sparkfun Venus GPS

I am using an Arduino UNO that is connected to an Arduino GSM shield (http://www.arduino.cc/en/Main/ArduinoGSMShield). Now, I want to connect the SparkFun Venus GPS module to this combination. (*...
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1answer
108 views

Data at Serial Port Avaliable

I am interfacing a GSM modem via Arduino at Serial port 2. I have seen that responses fron GSM modem are subject to time. Sometime its response are fast and sometime it are slow. I have a code like ...
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1answer
545 views

Arduino GSM Shield not responding?

I'm trying to get my Arduino GSM shield working with the example "Send SMS" code provided. However, when I upload and compile the program, the serial monitor displays "SMS Messages Sender" and nothing ...
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1answer
897 views

GSM library , sendSMS, string instead of char

I used the GSM library that comes together with arduino 1. Specifically the sendSMS part. I managed sucesfully to send SMS. Now the thing is, inside this library the SMS to send is stored in a char ...
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1answer
900 views

Set up an Arduino Cellular Shield SM5100B

I'm trying to set up an Arduino Cellular Shield SM5100B to send SMS. My setup is: Arduino UNO R2 SM5100B "Movistar" SIM Card (Chile) I've uploaded a code similar to the one described here, but ...
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0answers
17 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
19 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
15 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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0answers
21 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
28 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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0answers
23 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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0answers
28 views

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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0answers
77 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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60 views

How to connect components without using a breadboard? [closed]

I am in learning path of Arduino and IoT, I am preparing a project for fire system, but I am stuck in how to connect fire sensor, buzzer, led, and laser sensor without using breadboard. Please anyone ...
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0answers
28 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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0answers
15 views

SIM800L is not working with Arduino Mega [closed]

I have connected my SIM800L on my Arduino Uno and it worked, but when I connected it to Arduino Mega it didn't work. I don't know how to write this program without softwareserial so plz if you reply ...
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1answer
45 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
40 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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0answers
44 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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0answers
31 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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0answers
69 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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0answers
26 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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0answers
36 views

GSM900A module insert simcard

I connected the GSM with Arduino as stated, it responds to commands like AT+CFUN and some other than relating to sim card functionality, I have inserted a working sim card and still brings up CME ...
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0answers
11 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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0answers
50 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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0answers
22 views

Fastest sim module available?

I have used sim900 in my project but it isn't fast, I don't know if it is because it is on 2G or what, I wanna know if I can get something good that can send SMS messages immediately and doesn't take ...

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