In betweenreturns a number between 0 and 1023 that is proportional to the amount of voltage being applied to the pin.Schematic. CodeIn the sketch below, the only thing that you do in the setup function is to begin serial communications, at 9600 bits of data per second, between your board and your computer with the command:Serial.begin(9600);Next, in the main loop of your code, you need to establish a variable to store the resistance value (which will be between 0 and 1023, perfect for an ) coming in from your potentiometer:int sensorValue = analogRead(A0);Finally, you need to print this information to your serial monitor window.
Hi everyone
I am tasked with writing a simple program for communicating with a fuel-pump. I need to get information from it.
I never communicated with a device before. This is my first time writing a program for communication with a device. I have read lots of articles about RS485 communication but people mostly writes about how it works not much detail about how to communicate with the device using it. So i am having lots of confusions.
The SoftwareSerial class sets the serial port's other properties to the same as we set in the C/Qt application (SERIAL8N1, or 8 data bits, no parity, one stop bit). Step 2 - Configure the XBee properties. Just like with the C/Qt application, we need to put the XBee in command mode and set the channel and network ID to 18 and 68 respectively. Terminal shows how to create a terminal for a simple serial interface by using Qt Serial Port. This example shows the main features of the QSerialPort class, like configuration, I/O implementation and so forth. Also, the class QSerialPortInfo is invoked to display information about the serial ports available in the system. QSerialPort supports two general programming approaches. Qt Serial Port provides the basic functionality, which includes configuring, I/O operations, getting and setting the control signals of the RS-232 pinouts. The following items are not supported by this module: Terminal features, such as echo, control CR/LF, and so on. Configuring timeouts and delays while reading or writing. Qt Serial Port provides the basic functionality, which includes configuring, I/O operations, getting and setting the control signals of the RS-232 pinouts. The following items are not supported by this module: Terminal features, such as echo, control CR/LF, and so on. Configuring timeouts and delays while reading or writing. Simple C class example using serial port, USB, wireless This post is part of the Practical C programming tutorial for Bioloid Here you can find a post serie about using serial port communications with C/C and C#, for Windows, Linux and microcontrollers. Programming with a blocking serial port is radically different from programming with a non-blocking serial port. A blocking serial port does not require an event loop and typically leads to simpler code. However, in a GUI application, blocking serial port should only be used in non-GUI threads, to avoid freezing the user interface.
I have a few questions regarding RS485 communication.
- How do i tell device to give me the information i want
- How do i read info sent from device(probably using ReadData, but want to be sure)
- The data that is given to me contains what? Is it unique for each device or there is a standard for this
Can you give a little example also. :)
Thanks in advance.
Active5 years, 11 months ago
Is there any serial port facilities in Qt ?
If not, which crossplatform (desirable) libraries (for working with serial port and, maybe, with other I/O ports), do you recommend ?
All warranties and support, if applicable, are with PDF Electric & Supply Inc. Ge fanuc 90 30 manual. PDF Electric & Supply Inc. Sells new, new surplus and refurbished products which are sourced through independent channels.
lpapp43.8k1313 gold badges8383 silver badges114114 bronze badges
cybevnmcybevnm1,76644 gold badges2424 silver badges3232 bronze badges
closed as not constructive by casperOneJul 17 '12 at 13:37
As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. If this question can be reworded to fit the rules in the help center, please edit the question.
3 Answers
Frank BollackFrank Bollack
20.3k33 gold badges3838 silver badges5353 bronze badges
Well, there's always Boost.
In Boost there is a great Async I/O library called ASIO. It can perform operations in all sorts of endpoints, including serial ports.
There is a great example about how to build a minicom-like application using Boost::Asio, that you can use to see if ASIO will attend your needs.
Since boost works on all platforms/compilers under the sun, the cross platform requirement can be checked.
Cheers.
Edu FelipeEdu Felipe4,5891313 gold badges3939 silver badges4141 bronze badges
Here is a Qt serial library, works on Win, WinCE, Linux (i386 and ARM), Mac..
Also, it is based on QIODevice for a native feel, with it you can, if you like, direct serial communication onto TCPIP with little no no effort.
Qt Serial Port Programming Tutorial
It is LGPL also.. enjoy.
user483558user483558