AT commands are used to control MODEMs, such as GSM/GPRS/bluetooth modules.
0
votes
0answers
36 views
Sending SMS with AT commands - AT+CMGF ERROR
AT
OK
AT+CMEE=1
OK
AT+CSCS="GSM"
OK
AT+CMGF=1
OK
AT+CMGS="+44999999999"
> hello test message [CTRL Z]
At this point the connection hangs for 5-10 seconds.
...
0
votes
0answers
20 views
SIM900 AT Command for Variable Key
I am working on a Prototype unit with a SIM900 modem and trying to get the http post function to work.
I can get a standard POST function to work but the portal I am trying to push through to also ...
0
votes
1answer
85 views
How to use hc-05 with pic32
I want to use Hc-05 bluetooth module with my pic32 controller for communicating with other bluetooth devices. I want to test the hc-05 module with my pic32 controller. I have made the hardware ...
0
votes
1answer
69 views
What does the GSM AT+CSQ command output signify?
So the command returns the received signal strength(RSSI) and bit error rate(BER). I see that the RSSI is obtained even if the SIM card is not inserted in the GSM module. So what does RSSI signify?
...
2
votes
1answer
225 views
SIM800 - HTTP Get request time out
I've been working on a weather station project, and I used a SIM 900 module to upload the data to a web server. Recently I started using a SIM800-DS for the same purpose and I had to rewrite the code ...
0
votes
0answers
117 views
SIM800L loosing network registration
I'm using the SIM800L, which I bought recently and after I set it up, I found that there is a problem, that SIM800 loses network after some time. AT+CGREG for GPRA ...
-1
votes
1answer
101 views
Check GSM Module Status
I tried to send "AT" command via UART at some baudrate to my Cinterion BGS2T, and I am always getting response "ERROR".
I get error on every AT command.
How can I know what is wrong, or how to check ...
1
vote
1answer
209 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 ...
0
votes
2answers
235 views
AT commands for GSM
I'am trying to interface a GSM module with flowcode for PIC and the Tutorial I'am following suggests a module SmartGM862 which is not available in my market but instead some other SIM900 series module ...
1
vote
2answers
651 views
HC-05 Bluetooth AT+INQ command not working
I have followed the directions from the site below for bluetooth comm between an Arduino board using the HC-05 and an smartphone. It works fine.
The problem is that I need to measure the RSSI from my ...
-1
votes
1answer
321 views
AT+CIPSEND problem with ESP8266
Here I am facing an issue with ESP8266 CLIENT Programming.
The Problem is with AT+CIPSEND Command. This command is working for few times, but after few cycles, it waits too long for "SEND OK". I have ...
11
votes
1answer
644 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 ...
0
votes
2answers
210 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
votes
2answers
687 views
SIM908 GPS STATUS “Location Unknown” Error
I'm using a SIM908 module on a custom board and am having trouble getting the GPS location from it. Everything else works on the module. I can send SMS, make calls and send and receive data from a ...
1
vote
0answers
2k views
Serial AT commands with Bluetooth CSR8645 module
I bought a Csr8645 (bleutooth audio module). The module connect to my phone out of the box...
It should support some AT commands. So I have tried some but I don't get anything in response. The only I ...
0
votes
2answers
521 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:
...
0
votes
1answer
2k views
How to interface GSM with 8051 microcontroller to send SMS?
I am doing a project on SMS sending through GSM
using SIM 900 module and 8051.
My code is:
...
0
votes
1answer
445 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 ...
1
vote
2answers
1k views
ESP8266 Wifi Module - prints “ready” but not responding to AT commands
Just received my first ESP8266 wifi module with some excitement. However I've been unable to fully communicate with it. I have connected the module to my computer via a usb to serial cable and I'm ...
13
votes
4answers
2k views
Why AT command set?
Frankly, Why do all communication ICs(or at least many of them or most famous or popular) such as Bluetooth or WIFI or GSM or etc support AT command set? why don't they have a simple pin for D/C(Data ...
2
votes
1answer
2k views
GSM Modem will not register to network
After getting two modems (dev boards) Siemens TC35 and SIM900A I cannot get them to send SMS.
From the research it seems that somehow SIM cards will not register to network.
I bought three SIM cards ...
0
votes
1answer
223 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 ...
1
vote
1answer
316 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.
...
0
votes
1answer
197 views
GSM ZTE MG2639 module freezes after checking SIM
I'm communicating with my ZTE MG2639 module through UART.
Few seconds after powering it and getting +CPIN and +STKPCI it just ...
1
vote
1answer
162 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 ...
2
votes
1answer
326 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 ...
1
vote
2answers
7k 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.
...
0
votes
3answers
3k views
How to Make Sure SIM900 modem will always give me +PSSUTTZ string?
I am using SIM 900 modem to enable GSM connection wirh my product.
Micro-controller Communicates with SIM900 modem through a SET AT commands over UART.
My product is time critical and i need to have ...
1
vote
1answer
454 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 ...
3
votes
1answer
271 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
6answers
4k views
HC-05 Bluetooth module not responding to certain commands
I've got a problem with my HC-05 BT module. I'm talking to it from my PC via USB/UART converter. When it's in slave mode I can link it with another device, send data using module's and converter's ...
0
votes
1answer
661 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 ...
1
vote
2answers
2k 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 ...
2
votes
2answers
1k 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 ...
0
votes
1answer
5k 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 ...
5
votes
6answers
13k views
What AT command should be sent to modem to get time?
I am using SIM800E. I want to know what AT command should be sent to the modem to get time?
This modem has a RTC. But I need to set it automatically through cell tower. The tower can send the time to ...
1
vote
2answers
1k 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:
...
2
votes
1answer
2k views
Sending Multiple Messages using Sim300 gsm/gprs module
I have interfaced SIM300 Gsm module with lpc2468 through UART. My main motive is to send SMS when some special sequence run. Now my requirement is that I should send the same messages to two numbers.
...
2
votes
1answer
2k 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
votes
1answer
146 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 ...
0
votes
1answer
482 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 ...
2
votes
1answer
583 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 ...
3
votes
2answers
878 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
361 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 ...
1
vote
2answers
3k views
How to call AT command on XBee from Arduino
I am trying to set the SM (sleep mode) register on the XBee radio. These registers can be set with so called AT Commands, listed from pg. 28 in the XBee/XBee Pro Product Manual.
This can be done ...
1
vote
1answer
4k 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 ...
16
votes
4answers
4k views
Why do people use AT commands in serial communication?
I need to know why people in embedded systems use AT commands?
When I have asked people say that it is a standard.
So my question is: What does "AT" means? Why do people keep saying it's a standard?
...
1
vote
1answer
514 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, ...
0
votes
2answers
426 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 ...
