Questions tagged [gprs]

General Radio Packet Service, is a protocol to transfer data on 2g and 3g cellular networks.

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65 views

how to find GSM service level of a IP-connection?

I am using a GSM modem to send data to a remote server over TCP/IP connection. I am using STM32F103 for the software. I want to connect 3 LED's with the 'F103 to indicate which connectivity and ...
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1answer
48 views

which is faster GPRS vs 4G on arduino?

I am using Sim800 GPRS to send data to MySQL server online. I use Arduino mega 2560 for one update in MySQL, it takes 1-2 seconds to run required AT commands If I use a 4G module like SIM7000E will ...
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2answers
46 views

Is there any active GSM antenna exist? [closed]

Active antenna amplifies received signals with active components, so it has better parameters. Active antenna for the only receiving systems like GPS and TV signals are exist on the shelves. But the ...
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2answers
93 views

Can I use the same antenna for GSM and RF433 MHz?

I've already designed a PCB with GSM/GPRS chip and also with RF 433MHz receiver only (without transmitter). I would like to know if I can use the same antenna for both GSM/GPRS module and RF 433MHz ...
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1answer
46 views

If I need to send GPRS commands is it better to use a “proper” modem, arduino or a mobile? [closed]

I need to send some commands from a computer via GPRS protocol to some devices. The options I have found so far are: Commercial GPRS modem Arduino GPRS shield an old phone as GPRS modem Is there ...
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1answer
90 views

SIM800L cannot init

I'm working with SIM800L for remote-sensing communication via GPRS. The problem is, everytime the module is running initialization function (SIM800.begin(), different for every SIM800L library), it ...
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0answers
242 views

UART noise on A6 GSM module

I'm using the A6 GSM module to send data from my sensors board to a server via GPRS. The problem is that most of times, usually when the module attaches to the network or connects to the server, ...
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1answer
56 views

Connecting a Lithium battery directly to the GSM module

I have a GSM module (M66 from Quectel) and a single cell Lithium battery,Based on Datasheet module operated in the 3.3 ~ 4.6 V and as I know battery deliver 3.7 ~ 4.2 V based on it's sate of charge....
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97 views

AT+HTTPACTION=1 not transmiting my datas I downloaded with AT+HTTPDATA

I'm using a SIM808 with arduino, and I want to send via a post request some data to a server using a php page that receive data via post requests, I'm using this AT commands but whenever I check my ...
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1answer
183 views

Can the M590E's boot pin be used to reduce power consumption?

What does the boot pin actually do? Can it be used to reduce the module's power consumption when the module is not required? All recommendations are to pull it low to boot. Can it go hi again to turn ...
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2answers
52 views

Protection from fully charged battery

I want to connect a Li-Ion battery on a GSM/GPRS module expecially this one (http://www.electrodragon.com/w/GSM_GPRS_A6_Module). In general parameters is mentioned operating voltage from 3.3V to 4.2V ...
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1answer
911 views

GSM/GPRS antenna noise depending on cable length and position

A board I designed has a noise problem that is caused by an onboard GSM/GPRS module (the Quectel M66 [1]). This module is connected to a Siretta Delta 2C [2] dipole antenna via 20cm coax cable. The ...
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2answers
399 views

Help needed for understanding placement of flexible PCB GSM antenna

I am using flexible GSM Antenna for my application.I am sticking the antenna on top of my FR4 based PCB board as shown in the below figure. Note that the PCB, on top side (One towards antenna) has GSM ...
3
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1answer
4k views

GSM Module gets into reboot loop

I have assembled a diy m590e gsm gprs module kit, bought from Amazon. The seller provided image is: The Schematic used to assemble the kit is: I connected it to the Laptop using a CP2102 based USB ...
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1answer
538 views

Issue of data posting in GSM over the GPRS from when use Different service provider

I'm using Telit's HE910 GSM Modem To Post The data on web-server. so i'm using different company service provider SIM Card to test the data posting from different service provider. In this case when i'...
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1answer
446 views

GSM Data Post Over the GPRS Using GSM Modem [closed]

I'm using GSM Modem To post the data over the GPRS for specific website. when i'm posting the data using VODAFONE IN (APN: www) Sim card it pos the data in i'm recieved HTTP 200 ok Response But ...
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2answers
7k views

How to send HTTP parameters using POST method and SIM908 GPRS

I want to send HTTP parameters using POST method through SIM908 GPRS. Here is and example of what I want to send: ...
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1answer
1k views

Interfacing ATK-SIM 900A GSM/GPRS Module with Arduino Mega [duplicate]

Problem: I have this ATK-SIM900A GSM / GPRS module which will be used to send sms. But I can't figure out how to interface it with an Arduino as there are no documentation available online. Module ...
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1answer
169 views

Which pins does the Efcom 1.2 GPRS shield require to be connected in order to work?

I have this GPRS shield for arduino and I'd like to use it later on with some other standalone microcontroller. I have not been able to get it working though without connecting it to arduino and I ...
4
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3answers
296 views

SIM900 Conducted Emissions Fail

I'm currently having trouble getting a product through EMC. Radiated emissions were comfortably under the limit, but conducted are failing badly. Here are the results: The noise appears to be ...
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2answers
13k views

Posting to php server using SIM900 GPRS with AT commands

I am using a SIMCOM SIM900 GSM/GPRS module in an embedded hardware application. Rather than sending device data to a server by SMS (what I've been doing so far) I want to switch and start using GPRS ...
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1answer
1k views

Help SIM5320 Breakout Board construction for Raspberry Pi model B

I need a breakout board based on SIM5320 for experimenting web server http requests. I've found the board shown above in adafruit library and thought of using it as reference and slim it down to the ...
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1answer
418 views

GSM/GPRS reach for Class 4 2W 900MHz/ Class 1 1W 1800Mhz

I'm studying differents GSM/GPRS modules and all of them have two operation modes depending the frecuency (900MHz and 1800Mhz). If I'm not wrong, for the same power higher frecuencies have a lower ...
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1answer
337 views

Protect soundsystem from GSM/GPRS pulsing noise sounds [closed]

What is the best way to isolate soundsystem from an modem/cellphone to not hear pulsing noise sounds when GSM/GPRS communication is active.
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1answer
733 views

PIC24FJ128GA202 UART2 and UART3 not working?

I am working in pic24fj128ga202 microcontroller with L80 and M95 module. here L80 module connected with uart2 and M95 module connected with uart3. now uart1 working normally but uart2 and uart3 not ...
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1answer
3k views

How do I fetch data from the internet with a GSM module using GPRS? [closed]

Recently I have built a device using Quectel (GSM/GPRS module) interfaced with Atmel MCU. It will control another device using SMS received by that GSM module. Now I am trying to connect it to the ...
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2answers
2k views

AT+CSQ without Disconnecting PPP Connection in ARCH Linux

I have a Telit GL865 GSM/GPRS module which is connected to a SBC (running ARCH Linux.) via Serial Port. For GPRS connection, PPP connection as indicaten on this page. I want to read Cell Tower Signal ...
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1answer
3k views

AT Commands to transmit data through TCP/IP stack with LTE network

I need to design an embedded sotfware that will drive a LTE cellular device (like u-Blox TOBY L2 Series) and its TCP/IP stack to transmit some data toward a distant server. I'm waiting for the device ...
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2answers
2k views

GPRS HTTP 400 Bad request

I am facing some problem with GPRS Project. I am sending request to server through GPRS and receiving responce from the server. I have used AVR ATmega32 micro controller and SIM900 GSM/GPRS Module ...
3
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1answer
2k views

Getting GPS coordinates with GPRS/GSM module

I'm trying to understand if I can get GPS coordinates using only a GPRS/GSM module. Probably I can do it by triangulation using BTS on the terrain and based on the RF signal but is that possible? ...
4
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1answer
2k views

Help to understand/ explore small sized 3G and GPS Antenna Design

I recently came across an exciting device called Automile, from Sweden and what caught my eye is this - I am really impressed by the packaging and overall quality of hardware integration they have ...
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1answer
202 views

Interfacing a GPRS chip (WISMO218) with an RF antenna. Calculating line width for the right impedance

I want to interface the WISMO218 GPRS chip with an antenna. The antenna lines on the PCB board have to be very specific, otherwise the system won't work. I have uploaded the part of the datasheet that ...
2
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2answers
356 views

Modem to Modem via GPRS

I am working on a GPRS communication design. What I want to do to connects two modems together via GPRS. But I found that i could not connect. I was able to connect both modems to the internet using ...
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2answers
860 views

Which NTP server should I use for my product to update time?

I am developing a GPRS enabled embedded device.To synchronize time with the network I have to use NTP protocol. The nature of the product is such that I have to Hardcode the NTP server address inside ...
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3answers
29k views

SIM900 Error on AT Command AT+SAPBR=1,1

I intend to send some information through GET method to a php page using the SIM900 module. I tried the following sequence of commands with success. ...