I am looking for a way of using a baud rate of 62,500 (8N1) on a windows PC on a serial port or USB->serial adapter to communicate with an older piece of hardware that uses this speed. Can this be done via code or is it a hardware solution?
You can use Putty for open a serial port with custom speed.
Related
software Serial
I was searching on the internet and i was seeing this Software Serial a lot, i'm wondering what the Software Serial library is used for?
According to Docs:
The SoftwareSerial library has been developed to allow serial
communication on other digital pins of the Arduino, using software to
replicate the functionality (hence the name "SoftwareSerial"). It is
possible to have multiple software serial ports with speeds up to
115200 bps. A parameter enables inverted signaling for devices which
require that protocol.
Suppose that you are using an Arduino Uno which has only one Hardware Serial port and you want to connect it to a GSM Modem which uses a serial port to communicate. And you need to get AT commands from a PC user. So you need two Serial ports. You can use Default Hardware Serial for PC communication and one Software Serial for communicating with the Modem. Then simply send and receive AT commands.
There are some limitations for Software Serial like slower baud rate comparing to hardware serial, can't receive data from multiple serials simultaneously, etc.
It is recommended to use Software Serial for boards that don't have enough Hardware Serial ports. So you need to remember that using Hardware Serial always is a better choice.
I have borrowed an Arduino BT-V06 (analogue) from my college IT storage department.
At home I am trying to do some research on this for subsequent work I am going to perform with this Arduino later on. As this model is a 2006 version; my question is, how do I connect it to my laptop? Some sort of adapter? or perhaps shield it with a newer model that has a usb-port?
Because I would like to have it connected to my laptop in order to try out some codes on it.
Thank you very much for your time!
-M
There's at least two options. First, it's set up to be programmed over Bluetooth. So if you have Bluetooth on your laptop, you can connect the two wirelessly. Pins 0 and 1, per the documentation, are TTL serial transmit and receive pins (which are also used for Bluetooth communications), so if you AREN'T connecting via Bluetooth, you could connect a serial to USB adapter so you can connect to your laptop via USB. This reference has this to also say:
"The on-board serial communication between the bluetooth module and the Arduino sketch (running on the ATmega328) needs to be at 115200 baud (i.e. call Serial.begin(115200) in your setup() function). Communication between the bluetooth module and the computer can be at any baud rate.
Communication between the BT module and the computer can be temperamental. You might want to open the serial monitor a couple of seconds after resetting the board. The text of the Arduino getting started guide is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the guide are released into the public domain."
I have an Arduino 2560 and would like to send serial data to my PC. However, I am currently not using the Arduino Bootloader because I wanted to use a program that I wrote for an Atmega644 before (as far as I understood, one has to use the Arduino language when using the Bootloader?).
Does anyone know if what I am trying to do is possible with reasonable effort?
Connection to PC via 2560's serial0 does not depend on bootloader (if you plan connection when main program is running). You need 16u2 running to bridge 5V serial UART to USB or you can of course use any other option (e.g. MAX232 or so) to convert 5V UART to USB or RS232. But in case of RS232 double check baud rate error because of 16MHz crystal for particular baudrate.
2560 bootloader just implements firmware flash.
I just start a project which is very basic actually. But I need an information. It is about arduino serial communication. Here is the question.
If I connect arduino to computer using TTL to RS232 converter without USB cable then can I still use serial monitor to get some data or what happens ? Assume arduino is programmed before using usb cable, and it is powered externally when usb is not used.
for instance the code just
Serial.println("It is working");
delay(1000);
Thansk a lot.
you will fry it. Standard RS232 use a +-12V level, while arduino use TTL level (0-5V), so you still need a RS232 -> RS232TTL converter. If you use it, then using virtual serial over USB or real hardware serial is exactly the same, except that hardware serial port never appear/disappear when you plug in the arduino (there is not something like plug'n'play in rs232, it is always plugged)
I am trying to connect ATmega128 uart to PC using USB-to-RS232 converter so that PC can receive and transmit data from microcontroller using hyper terminal. I set the correct stop bits and baud rate in hyper terminal. It doesn't seem to work.
Can any one tell me if this is possible by USB-to-RS232 converter and if not what other options are there for serial communication between PC and microcontroller ?
You should be able to do this without any issues. I'd suggest putting your USB-to-RS232 cable in loopback mode first (if possible) to ensure you can communicate, then connect it back up to your MCU.
If you aren't seeing what you expect the first thing to look at are the settings, specifically the baud rate. Since your USB-to-RS232 cable is from a third party vendor I'd assume that your settings on the host side are OK. So you should look in to your MCU code to ensure that all your clocks are running at the proper speed and you have indeed performed the correct calculations to achieve your desired baud rate. Debugging here to ensure you are transmitting data out of the device is important.
Additionally, there are tools that can help you debug. Portmon is a tool from Microsoft that lets you look at the serial data path on the host side. I'd also recommend a USB analyzer, such as an Ellisys, that will allow you to view data going across the line from your MCU to the host.