I am programming some functions in a STM32 board. This functions consist in sequences of AT commands, which are sent over UART to the SIM7000E module, to do different tasks. The module uses a SIM with GSM.
The configuration function sends the following commands:
AT+CPIN=1234
AT+CREG=1
AT+CGATT=1
AT+CIPMUX=0
AT+CSTT="vpn","user","password"
AT+CIICR
AT+CIFSR
Now I want to program a function to check if the module is consuming network data after the configuration function. I am not sure whether I should check CREG, CGATT, CIICR or other command.
So the question is: In which point is the SIM consuming network data?
Thank you in advance!
I think It starts consuming data after the AT+CSTT command. Until the AT+CSTT command, module does not have the GPRS connection. After the AT+CSTT commands it is open to GPRS calls.
On the other side, even if you have an unvalid SIM card before the attaching the network, you can not know that you have data packet or not. I think like that I am not %100 sure but, I suggest like that.
Related
USR-7S4 is an LTE module and I just want to check whether it can communicate with CC2640R2F BLE module.
We can use UART communication and transmit the AT initialization commands described for the module. Once done with one AT command we need to accept the response using BLE and immediately clear that AT command so that the next command can be given. This helps to receive the new responses from the 0th position of the buffer. This clearing can be done using: "memset(rxBuf,0,sizeof(rxBuf));" commands.
I want to make an Arduino program that only makes requests for voltage measurement of some sensors through the SCPI protocol connected by RS232. I have found several libraries created by users but they have many unnecessary functions for what I want to do.
Specifically, what is the command to be sent by the RS232 to request the desired sensor voltage?
Thanks.
Try using : Arduino SCPIParser Library by LachlannGunn available on GitHub.
I am currently attempting to use a computer and RS232 connection to control a HP 34401A Multimeter. I am able to use commands such as "SYSTem:REMote" or "*TST" however when I attempt to use a command that sends back information nothing is returned to the computer. If I use another return command directly after I get a -410 error signifying that the output buffer is full. Are there any commands I need to use to tell it to send the information to the computer? I have been looking through the manual for one but cannot find it.
Extra Info:
RS232 Connection Setup: Baudrate=9600, Data bits=8, Stop bits=2, Parity=None
Since the connection is DTE to DTE I am using a null modem cable
I am using Termite to send commands to the multimeter
Thank you for any help!
I am trying to use GPRS functionality of the GSM/GPRS modem for sending data to the remote server but i am unable to do so.I had posted a question on Arduino Forum but didn't get any reply.Here is the link for the question.
Well my Main concern is i) I am using a GPRS/GSM Modem and i am not sure about the Power requirements of the Modem.At present i am using a 9V and 1 amp supply but the network LED on the modem is dignifying that Modem is not getting the network. So can this be because of the insufficient supply to the modem?
I very much doubt it's a power thing. Although I have limited experience with Arduino boards.
You can verify that the general GSM stuff is working by executing AT+CREG commands to check if it is connected to the mobile operator.
If you need more detailed help then I think it makes sense for you to post what AT commands are being sent to the modem. And what the modem on the firmware/software side is saying.
Below some information about dealing with GPRS and AT Commands (aka GSM stuff).
With GSM modems there are commonly three ways of getting GPRS and executing AT commands (GSM) simultaneously.
1) Inline multiplexing
As far as I am aware you can switch contexts within the AT command console. This is a little challenging when it comes to writing code. I would advise against this.
2) Mulitplexing over a single serial interface
This is done via drivers that support the GSM 27.010 specification. Some manufacturers provide MUX drivers for this purpose.
The standard command is AT+CMUX. I strongly suggest taking a look at the modem reference manual to find out exactly how to execute this command. You can get a rather information also via AT commands. By executing AT+CMUX=? to see what parameters are expected.
Effectively then you would have two serial connections open to the same serial port. One for GPRS and one for AT Commands.
Negative impact is that the performance (speed of command execution) is significantly reduced depending on how the hardware copes with it.
3) Multiplexing over multiple serial interfaces
The GSM modems that I know of provide multiple serial interfaces (UART). Therefore one can be used for executing standard AT commands. And another can be used for GPRS communications.
I'm not entirely sure if this is possible with the SIM900A. There you would have to look at the hardware information.
I need to set an interruption for the serial (uart) port in Beaglebone, in such a way that when the serial port receives any info an interruption (function) is automatically activated doing something with the received data.
I have searched methods to do so, but no success. I have worked with interruption for uart ports in microcontrollers, and I though I could do the same in Beaglebone.
Any suggestion to do it?
Thanks in advance.
Use the
select() or poll()
system call to do a polling on the tty file. As soon as any data arrives on the device file, you take the data and do the stuff you intend to do.
Or you can run a dedicated thread which continuously polls the uart and deals with the data.