Questions tagged [gsm]

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

Filter by
Sorted by
Tagged with
0
votes
2answers
2k views

SIM800L module just repeating data sent via serial

I've got a Teensy 2.0 with simple AltSoftSerial as displayed on image: As you can see, when I send a command (or any other input via serial) the SIM800L module sends me the same input. I tried to ...
0
votes
2answers
11k views

Not able to send SMS to Mobile using GSM900A and Arduino Uno

I tried the code shown below (found here) void setup() { Serial.begin(9600); //Baud rate of the GSM/GPRS Module Serial.print("\r"); delay(1000); Serial.print("AT+CMGF=1\r")...
0
votes
1answer
189 views

Arduino and SIM900 unavailable all the time

I have the a problem with my arduino MEGA 2560 and the SIM900 module. I want to save the outputs of the AT commands, but I never get a chance. If I print mySerial.available() I only get 0. Sending SMS ...
-1
votes
2answers
265 views

Can't Interface SIM900a With Arduino Uno

I've got the following module of SIM900a. My connections are: VCC -> External 5 Volt 1.5 Amp Supply GND -> Common GND TX -> Arduino RX (Pin 0) RX -> Arduino TX (Pin 1) I hear a ring ...
-1
votes
1answer
78 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 ...
-1
votes
1answer
1k views

SIM800L is not registering on network

I'm testing SIM800L module by registering to network manually and I'm getting an error message. Here are the commands I tried. AT+CSQ +CSQ: 31,0 OK AT+CBAND? +CBAND: EGSM_MODE,ALL_BAND OK AT+...
-1
votes
1answer
1k views

Shield SIM808 EVB V3.2 charge a Lithium battery?

hello friends do you know if, can this shield (SIM808 EVB V3.2) charge a lithium battery directly or i need additional hardware?, I know that module has conection for battery but it can charge it?
-1
votes
1answer
1k views

Parsing Date/Time(GSM Module) [closed]

Can somebody show me another way of storing Date/Time from GSM Module? My current code gives me wrong data. Serial1.print("AT+CCLK?\r"); while (Serial1.available() > 0) { int Years = ...
-1
votes
2answers
9k views

Need to convert char to string [closed]

I want to convert incoming_char to string. How do I do this? Then I should substring that string? #include <SoftwareSerial.h> SoftwareSerial SIM900(7, 8); //Variable to save incoming SMS ...
-1
votes
1answer
3k views

Send SMS Arduino Uno + SIM900A shield

I am working on a module to send messages. I write the message on the serial monitor + phone number and I have to send the message to the line. Question: How to send messages through the SIM900A ...
-1
votes
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 ...
-1
votes
2answers
905 views

How can I connect mysql with Arduino using GSMshield [closed]

How can I include mysql.h library in IDE of Arduino to connect Arduino to mysql database by using GSM shield?
-1
votes
1answer
55 views

Regarding use of software serial two times

Can we configure two digital pins as serial pins using software serial library?
-1
votes
2answers
1k views

GSM GPRS module not getting any output from Rx , Tx

I am using a SIM800 GSM/GPRS module. I connected it using 4 wires: Vcc 3.7 volt (2 amp supply), RX and TX and GND. Whenever I try to send a command it shows me nothing. Here is my code. //Serial ...
-1
votes
1answer
461 views

ardino gsm not working [closed]

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 ...
-1
votes
1answer
1k views

connecting GSM 900A module to arduino

I am trying to connect my arduino uno to GSM 900A with the help of this tutorial https://elementztechblog.wordpress.com/2014/10/10/interfacing-sim900a-gsm-modem-with-arduino/ but the calling is not ...
-1
votes
1answer
2k views

Code does not pass `gsmAccess.begin(PINNUMBER)==GSM_READY)` [closed]

I am not able to get my code to pass if(gsmAccess.begin(PINNUMBER)==GSM_READY) { I have modified the PIN number on my sim card to be 0000, and yet its stuck on begin. How do I prepare the SIM ...
-1
votes
2answers
51 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 ...
-1
votes
1answer
35 views

Problem communicating with GSM module which is a Fona 3G from adafruit

My issue is fairly simple to describe but I have no idea what the problem could be. So I got my FONA 3G and immediately after taking it out of the box, I connected the battery and I wired up my FTDI ...
-1
votes
2answers
514 views

SIM7600 A-H not responding directly when connected through pins

I am working on a project which utilizes three components: Arudino Pro Mini(5v) Breakout SIM7600 A-H from AND technologies 9V Battery (connected to RAW and GND on the Arduino board) I am trying to ...
-1
votes
1answer
904 views

GMS send SMS text messages many times

The GSM sends many SMS text messages and does not stop. How to send only one SMS? This is my code: #include <SoftwareSerial.h> SoftwareSerial mySerial(9, 10); char msg; int vibr_pin = 7; void ...
-1
votes
1answer
566 views

Data is not sending to Thingspeak using SIM900 with an interrupt in the code

I'm currently working in a weather station with online recording on Thingspeak. When I send a set of parameters (T, Pressure, Humidity, light), I don't have any problem with sending data. But when I ...
-1
votes
1answer
2k views

SIM800L can't send SMS

I have a SIM800L module (green board). I used this to test my module. In that page, it use a SIM800L red board with a 3.7v LiPo battery. But I directly connected 5v from the Uno to the module. GND ...
-1
votes
1answer
338 views

IR sensor not incrementing or decrementing inside the loop

My project is automatic room light controller with visitor counter using Arduino. My project was running correct upto this, but the problem started when we connected GSM module to our project because ...
-1
votes
1answer
331 views

Why is GsmScanNetworks not working?

I'm using an Arduino UNO with an Arduino GSM Shield 2 with Integrated Antenna A000105. However, when I try to upload the code, in the serial monitor it tells me my IMEI is 0 and signal strength is 0 ...
-1
votes
1answer
3k views

Sending POST request to HTTPS aws server using SIM900A

I have hooked up an SIM900A module to my Arduino UNO and I wanted to send a GET request to my aws server for which I have created a RESTful API, the problem is that when I send a request using AT ...
-1
votes
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.
-1
votes
1answer
2k views

Is the A6 module broken?

Hi recently I've could send some messages with the A6 GSM module, which uses AT commands. To switch on the board, you need to press the power button about 4 seconds or connecting the VCC pin to the ...
-1
votes
1answer
3k views

SIM800L GSM Module, no network signal RSSI

I am using a GSM 800L module to send SMS messages. When I test the module with Arduino, it shows a 0 : -115dbm signal strength. So basically there is no signal. SIM800L is a quad-band GSM/GPRS module ...
-1
votes
1answer
389 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 ...
-1
votes
2answers
3k views

GSM Modem Connection Directly to Rx and Tx

I am using Arduino Uno and using SIM800 GSM GPRS modem. I am connecting Arduino directly with SIM800 GSM/GPRS modem. I already read manually about GSM like how much power supply it needs and what ...
-1
votes
2answers
547 views

Arduino GSM Module with network GPS

I have looked through the AT command set of Arduino GSM Shield boards. I dont find any AT command that provides network GPS. I wonder what I am missing. Why isn't it possible for GSM module to provide ...
-2
votes
1answer
458 views

Receive SMS example gives me a garbage values

When I run my Receive SMS example code, By default every time I get the same thing.I am trying to send sms to my sim card present in the Arduino GSM shield. I don't want this message. How to solve ...
-2
votes
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 ...
-2
votes
1answer
316 views

a code problem for arduino GSM 1400 to send a SMS when tilt movment is detected using accelerometer [duplicate]

There is a mistake in the design implementation of the code probably in if statment - when using the serial monitor it repeatedly shows printf() statements from the code instead of "Sending SMS ...
-3
votes
1answer
455 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(); ...
-3
votes
1answer
11k views

ARDUINO UNO+SIM808(GPS/GSM) SYNCHRONISATION

I started a project quite recently where I intend to combine the Arduino Uno and the sim808 module which has gps/gsm/gprs all together in one. The GPS functionality works fine. Just the GSM both ...
-4
votes
1answer
141 views

Can I put a T-mobile sim card into the SIM800L Module? [closed]

I am trying to connect my SIM800L module to my arduino, but am confused what kinds of sim cards work. My phone currently is an IPhone XS, and I would like to take my tmobile sim card from there and ...

1
4 5 6 7
8