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Questions tagged [gsm]

GSM is an abbreviation for "Global System for Mobile Communication"

GSM is a second Generation Cellular Standard popularly known as 2G Standard. It is standardized by ETSI(European Telecommunications Standardization Institute).

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Find time taken to connect to a call using AT command

I am using a GSM modem and using minicom to pass AT commands to the modem. I need to find out the following. Time taken to initiate a call. Time elapsed till the user picks up the call. Duration of the call. Time modem takes to disconnect. I am…
Kushal Shah
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How to check whether a Java String contains GSM Extended Characters (non Unicode)

My Aim: I want to check whether a Java string contains characters from GSM Extended. The existing code successfully checks for GSM characters, but I am struggling to grasp how to check for GSM Extended characters such as '[' and ']'. My…
Andy A
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Encoding/Decoding PDU 7bit septets GSM long messages

I'm looking for Encoding/Decoding algorithm. I have tried this: http://codeproblem.hamaraquetta.com/articles/languages/81-net-framework/76-encoding-sms-in-pdu-format-in-net?showall=&start=1 and no luck. :( Here is what I'm trying This is the…
hackp0int
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GSM Modem, Exception: No data received from phone after waiting for 30046 ms

I have made a Windows Services which after 10 ms gets received unread messages from Modem through GSM Library. Every thing is going ok. But sometimes randomly it logs "No data received from phone after waiting for 30046 ms" exception and sometimes…
Ali
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Serial Port Problems on Windows Server 2008

I've an application that uses GSM commands sent over a serial port to a GSM ModeM. The application works just fine on Windows XP, 7 etc., but sometimes it does not connect to the serial port on Windows Server 2008. I tried to check using an…
user1173240
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In gsm modems, how to inform when a new message has been received (Interruptly) using at commands like CNMA or CNMI?

I'm developing a winform program in which, I need send and receiving SMS messages, I have no problem in sending SMS, but i don't know how to inform when a new message has been received in a gsm modem? I wanna have an acknowledgement like an…
Hassan TBT
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Send SMS using GSM modem in PHP

I would like to send SMS from my GSM modem. I tried to implement this using this link as reference. But my modem will not produce any response.Any help..Thanks in advance.... Here is my code snippet.. $gsm_send_sms = new…
sheik
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output of AT command c++ code

I wrote the following code which sends a simple message to my mobile with GSM SM5100B. But it does not work. I would like to check the outputs of each printf line with c++ code. For example AT+CMFG=1 ok AT+CMGS="69******" ok etc. Is there any why…
dali1985
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GSM Modem Mapping in linux

My task is to find out which GSM modem is connected to which serial port and write a programm in python which does the following work. Now since multiple sim cards can be connected to a given modem, my task is to find details of the sim cards which…
Kushal Shah
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C++ code to send messages with GSM from a Raspberry Pi

I just connected my Raspberry Pi with a SM5100B GSM. I would like to test it sending a simple message in my mobile. I can do it with emulators like Cutecom and Minicom (because I have a Raspbian Linux version). But Is there any code in C++ which…
dali1985
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How can I call an "AT command" in Codesys for a GSM modem? Not standard send_sms, etc

I have a GSM modem and a PLC. The PLC sees a modem (I use a *.lib and functional block "openPort"), but I don't understand how send an "AT command" to the modem, for example, "ate0".
noxom
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Using GSM and GPRS at the same time

I am sending data continuously to a remote server using the SIM300 GSM/GPRS modem connected to an Arduino Uno. At the same time I want to check if I have received an SMS on the SIM card. In the setup function I have configured the modem to GPRS mode…
snekam
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Receiving SMS using GSM and controlling LED using Arduino

Has someone come up with a solution with the above stated problem? We are using Arduino Duemilanove and SIM 900 GSM module (http://robokits.co.in/shop/index.php?main_page=product_info&products_id=303) We've tried to work on the similar problem of…
Uttam Pal
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Writing message parameters read from a GSM modem into MySQL using Python

I'm reading some data in a message that I receive from a GSM modem in Python. I need to extract these data parameters before I write them into my MySQL database. Before I do this, I parse the message in a couple of stages before I am ready to write…
Anon
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SIM 900: Error 604 Stack Busy

I'm using a SIM 900 GPRS Shield for Arduino for sending data using HTTP command; sometime when I use the command AT+HTTPACTION=1 I receive error code 604, that mean Stack Busy. Someone know what is the problem? If I reset the board I receive the…
Nicola
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