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Questions tagged [at-commands]

AT commands are used to control MODEMs, such as GSM/GPRS/bluetooth modules.

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2answers
2k 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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1answer
615 views

Help with GSM Module from Telit GM862

I bought a GM862 module some while ago, I inserted the SIM card and made all the necessary configurations but I always get the: AT+CREG? +CREG: 0,2 response, ...
3
votes
1answer
910 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
1k views

Quectel m66 bluetooth usage?

I've been working on m66 and got it connected to PC via usb to serial converter, and got it up and running. AT command replies with ...
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vote
2answers
3k 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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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 ...
0
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2answers
471 views

DB9 Serial communication

I am getting some strange character displays on hyper terminal, after establishing communication with my GSM modem using the appropriate baud rate. When I type "AT", it appears to get repeated or ...
1
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1answer
6k views

Is it Possible to receive the phone calls through GSM Modem Interfaced with Computer in Computer?

Actually I am doing a Project. GSM Modem is interfaced with the PC. Remotely a mobile phone will dial to GSM Modem(SIM inserted). Is it possible to receive the voice signal trough the modem to PC? For ...
1
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1answer
800 views

hlk-m30 WebClient example

I have started working on HLK-m30 WiFi module. I am developing the simple client on the module using simple AT commands. I have Opened socket TCP client and then Write data using the command. ...
3
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1answer
453 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 ...
2
votes
1answer
228 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 ...
1
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1answer
1k views

AT+CNBP command for SIM5216E cellular module [closed]

I am trying to use the the simcom AT command set to change the preferred band on my "SIM5216E" module. I know I need to use the AT+CNBP command, but I am unsure of what code I need to enter to select ...
2
votes
1answer
481 views

is 'Ok' important when sendin AT commands to modem

I'm currently using VHDL to program the FPGA Spartan 3AN Kit-set. The objective is create a programme to send an SMS to a mobile phone, using the Kit-set via the modem. I'm done with the transmit ...
2
votes
1answer
405 views

How to handle nested final result code in AT-command text?

I am writing a parser (a finite state machine to be more precise) for AT-commands and I don't see how to handle a particular corner case: Here is the specifications of the modem communication: When ...
0
votes
1answer
492 views

UART no reply from BTM511 Bluetooth module

I am trying to connect a Bluetooth module (BTM511) with my Arduino. In order to see that I can actually communicate with the module, I first try to just send ...
0
votes
1answer
714 views

GPRS modem gets stuck/hangs up when “AT” is entered

I started working on a U-blox LEON-G100 gprs modem connected to the PC terminal through UART. Whatever character I enter into the terminal gets echoed back except "AT". When I enter "AT", the modem ...
3
votes
2answers
1k views

Using BLE module by blueradios

I want to use the bluradios BLE module. Here is what I am talking about, Another link for the material available on the site. Now, I would like to use AT command set to program the module. The site ...
0
votes
1answer
712 views

SIM900 and Phone Numbers

How do I add a phone number to the SIM900? Can I add a phone number to the SIM900? Assuming I can, would I send the phone number through the AT Commands or the actual SIM card? I don't know how to ...
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2answers
2k 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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2answers
3k views

Is it possible to send AT commands through TCP?

I have a SIM900 GSM/GPRS device, I can send AT commands through HyperTerminal and everything is fine. I can configure GPRS connection through AT commands: ...