GSM stands for Groupe Spécial Mobile. It is a standard set developed by the European Telecommunications Standards Institute (ETSI) to describe protocols for second generation (2G) digital cellular networks used by mobile phones.

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Connection problem with Arduino Mega 2560 and GSM shield ( official M10) [migrated]

As I don't want to stack the shield over the mega 2560 board, I try to connect only the pins that used for GSM communication. Here are my connection: Pin 3 on Mega <==> Pin GSM Rx on Shield Pin ...
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1answer
92 views

Receiving empty data from gprs module? [closed]

I am trying to send a string from a Huawei MU509 GPRS modem to a Linux server over the internet. I am using an AT command tester to simulate AT commands. After giving the ...
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1answer
31 views

Powering an iComSat GSM Shield and a Gear Motor with LiPo Battery

I have an iComSat GSM Arduino Shield (based on the sim900) and a gear motor that I am planning on using with a Teensy 3.1 microcontroller. I'd like to power the whole rig using a 2000mAh LiPo Battery ...
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1answer
34 views

What is the proper GPRS / GSM modem setup to work with 5 voltage sensors?

I've been looking at modems and most of them come in RS232/485 input only. I need to hook up 5 different power cables to the modem to monitor their voltage. Some of the modem's I've found have 4 to ...
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1answer
37 views

GSM module working when powered by laptop via USB but keeps restarting when powered by battery

I am using a sim900 module in the following link and I connect it to my laptop using USB to TTL converter and the module works properly. But, when I connect the same module to 9V DC battery the module ...
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1answer
142 views

GSM SIM-300 read msg problem

I'm unable to get a proper response from my GSM modem300, sometimes it responds with nothing, sometimes it replies half of line of ONE message from full inbox, sometimes it just sends the command ...
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213 views

What is the difference between SIM300, SIM900 and SIM900A

I have came across these SIM modules on an online electronic shop. My primary target is just to receive short text messages from other subscribers. But then this question about these three (if there ...
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1answer
79 views

GSM 3G VSWR and antenna testing question

I'm a recently converted SW engineer to EE (Graduated less than 3 years ago, BS in Comp Eng, focus on Digital hardware) and I've been made the hardware lead on a project here at work. The project is ...
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2answers
265 views

sim900 escape character error

I am trying to send some hex data over TCP using SIM900A module. But the sequence of data has a byte with value of 0x1B which is the escape character. As a result the module terminates the command ...
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1answer
169 views

Longest range remote control

I would like to make a long range (5Km) quadcopter. As of right now, I'm just trying to find out the best way to control it. I know that there are some 5Km R/C transmitters but they are the size of ...
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2answers
186 views

GSM vs Bluetooth shield for android to arduino communication [closed]

I need to communicate between a hacked android device and an Arduino primarily sending signals to turn on lights. No voice data. I was under the impression that Bluetooth is the best solution but ...
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1answer
59 views

Doubts related to SIM300 power rating and its configuration?

I just started reading SIM300 data sheet (http://probots.co.in/Manuals/SIM300.pdf). Under the section 5.3 Power supply ratings.I have few following doubts i) peak supply current transmission is ...
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0answers
166 views

SIM cards not responding to SIM908 module

I have a SIM908 module on a dev kit board. I have three SIM cards that are all detected fine on the previous version of the board. However, the v2 only detects one out of the three SIMs. I put the ...
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2answers
257 views

Microcontroller with integrated GSM & GPS support? [closed]

I am looking for a single chip microcontroller with GSM & GPS solution. Is there any microcontroller chip which is specifically available for GSM & GPS solution? So that it will act like ...
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0answers
40 views

Why is GSM interference audible? [duplicate]

We have all heard the buzzing sound that your speakers makes when you use your phone near your radio or amp. My question is why does one hear this interference if GSM operates at ~800-900MHz which is ...
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2answers
70 views

Collecting data from GSM devices

this is my first question on electronics, so I hope I will get it right. :) GSM and GPS are topics which are quite new to me, but I will try to be as clear as I can. Is it possible to collect data ...
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2answers
179 views

How to pick the right capacitor for device with significant current peaks?

I'd like to power the GPRS modem (uBlox LEON G100) with a 4V 500mA power supply. How can I calculate the capacitor parameters so that they will provide the necessary current for TX slots? The ...
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2answers
225 views

SIM card for SIM908 module

I just got this SIM908 dev board, and I'm trying to get it working. However, it keeps telling me "SIM not inserted": AT+CPIN? +CME ERROR: SIM not inserted which ...
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0answers
485 views

Gsm sim900 cannot read sms

I am using an arduino uno r3 with a sim900 module. I can send messages and make voice calls using https://github.com/jgarland79/GSM_Shield but I cannot read any sms messages. The getsms function ...
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1answer
315 views

How can I attach a microphone and speaker to the Arduino GSM shield?

I recently purchased the Arduino GSM shield so that I could build my own low-tech cellphone. Now that I've successfully been able to send and receive text messages, I would like to add the ability to ...
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0answers
791 views

Correct AT Commands sequence for Quectel M95 GSM module

I have easily managed to connect the M95 GSM module to an Arduino and can communicate. I want to have a very basic way of posting data to a website from the Arduino. It seems the AT commands are ...
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4answers
1k views

Is an omnidirectional antenna a must for a cell phone?

I have read somewhere (but unfortunately I am not able to remember where) that cell phones do need an omnidirectional antenna. If it is so, what are the reasons for that? Why a normal directional ...
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3answers
1k views

What AT command should be sent by modem to get time?

I am using SIM800E. I want to know what AT command should be sent by modem to get time ? This modem is having an RTC. But I need to set it automatically through cell tower. The tower can send the time ...
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1answer
276 views

netduino plus 2 compatible gps/gsm module

I have a netduino plus 2 board and I am trying to send gps location with gprs to my server.I am a java programmer by profession,but recently I got interested in IoT and m2m communications.I would like ...
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1answer
111 views

anyways to receive data from the GPS module with GSM/GPRS [closed]

Am doing a project using the GPS. the main scenario is to display the position of the object in the maps. Scenario : am plan to use a GPS Antenna in the Arduino/Netduino board. where i will code to ...
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135 views

Indoor Phone/Tablet tracking with multiple nodes

I'm looking into providing a distributed device tracking system using a number of separate nodes to detect Wifi/Bluetooth devices by their MAC addresses. (It's to power an app, not for secret ...
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2answers
188 views

GSM/GPRS AT command - hitting a link

I am trying to target a specific page (script) on my webserver using a GPRS modem. I can hit my domain, and get a reply back but then when I am trying to call my script it just won't let me: ...
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1answer
73 views

How to combine two independent estimates of location

For finding mobile location we know two methods: Trilateration of signal strength and Timing Advance. Now to improve accuracy we need to use both methods simultaneously. We are able to use both ...
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2answers
143 views

Pull signal low using a pic microcontroller

I'm working with a ADH8066 GSM Module and a PIC16F688. I want to reset the ADH8066 using the ON_KEY pin which is described as: ...
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2answers
106 views

ADH8066 with Bus Pirate

I have an ADH8066 GSM module that I'm trying to get up and running. I'm powering it with 4V (via a 2A adjustable regulator), and I'm using a Bus Pirate connected to its RX0 and TX0 lines. I'm not ...
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1answer
267 views

Trying to find location in GSM network

I am using a GSM modem by Simcom SIM 800E. I'm interfacing it over the serial link. I am passing command AT+CSCB to get the location. But I am not getting it. I ...
2
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1answer
89 views

Signal the MCU using GPRS

I am working on a project with a GPRS and MCU. I am feeding the data to my server via GPRS, it's socket server. I was wondering if there is a way ( AT Command ) to do the reverse, I mean I like to ...
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117 views

Embedded project using Mux and Demux for antenna

In our current embedded project we are implementing a GPS ,GSM and Wifi Module. To connect these modules to external antenna board,separate SMA cables are used.As our design requires each of the ...
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2answers
5k views

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 ...
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1answer
77 views

Embedded board level functional test at factory

My embedded project has a GSM and a GPS module. What is the best way to test the radios of these modules after the production of CCA like in a factory conditions.I was thinking of signal generators ...
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2answers
929 views

arduino-sim300 gsm communication

I am establishing a serial connection between the arduino uno and the sim300 gsm module.One way of doing is removing the max232 circuit and soldering tx rx wires from there onto the arduino board. A ...
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1answer
309 views

Using Arduino Uno to Log GSM Air Interface Messages

Is it possible to log the GSM Air interface messages that are sent between a GSM Module and the GSM/WCMDA network using an Arduino Uno? Basically, I want to log/record all the GSM messages of the Air ...
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1answer
672 views

How many functions can I put into an arduino uno? [closed]

Is it realistic to put the following: GPS module, GSM module, SD card slot and about 4 analog sensors into Arduino uno? (have not yet goten an Arduino in my hands).
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120 views

Read Bricon speedy trap data

I am having a bricon speedy trap timing sensor for my pigeon loft to get their comming time from the contests. The system has a trap sensor and the pigeon has another tiny sensor bound to the foot. ...
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1answer
184 views

Mapping of TDMA frame on to E1 frame

In a GSM network TDMA frame is used to transmit information between Base station and Mobile staton and E1 frame is used as the media to carry information to and in the Backhaul. How is th TDMA frame ...
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1answer
104 views

GSM Power Supply

http://www.powersystemsdesign.com/usb-modem-design Can anyone tell me how the energy values in the table are calculated in the link above,
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2answers
1k views

difference between voice and data services?

What is the difference between the voice and date services. I have read that for voice services T1/E1 frame is used and for data services a frame with a standard header and payload nd tail is used ...
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1answer
902 views

how much bandwidth does a phone call require and how much is the capacity of a single E1?

How much is the bandwisth requirement for a phone call connection? Considering a non-channelized 1 with 32 time slots how many calls can an E1 support? Say its 'n'. Does that mean n+1 call will not ...
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195 views

3G Antenna for arduino Equivalent?

I am looking for a US equivalent for this antenna External GPRS-GSM-UMTS Antenna which I know is 3G compatible with this 3G/GPRS Shield for arduino I'd like to not lose any potential capabilities of ...
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2answers
447 views

Development board with cellular capabilities smaller than Arduino

I would like to build my own cellphone (phone calls and texts at least). Having experience with Arduino, I found several cellular shields and libraries that could allow me to do so with Arduino. ...
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1answer
228 views

digital voice on gsm modules

I would like to understand how to handle digital voice on gsm modules. After reading 3gpp gsm mux 07.10 specification it is my understanding that gsm modules can be configured to transport voice ...
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1answer
315 views

Establish connection between analog and GSM modem

I want to know if I can call a GSM modem (a SIEMENS MC55) from a normal analog (PSTN) modem. If so, how do I have to configure the GSM and the analog device? I've read about the +FCLASS and +CSNS ...
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1answer
774 views

Arduino, GSM quadband module and gas sensor connection anyone?

I have an Arduino, a GSM quadband module and a gas sensor. I could only find connections of GSM to Arduino and gas sensor to Arduino. Anyone who can give me a connection diagram of three devices?
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1answer
1k views

Can this used with Arduino to send SMS to phone?

I want to know the possibility of using this TC35 board to send SMS to my phone? If there is possibility, what about codes? Does anyone have relative codes for it?
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1answer
5k views

Designing a GSM PCB antenna

Before someone complains about my crappy design I should tell you that my knowledge on antennas or RF is near zero. I recently worked on a project that required a GSM module. After testing it on a ...