UART on raspberry pi

[thivtulz]

How to use UART on raspberry pi board?Any one can help me about this?.

[-rst-]

Something here http://www.raspberrypi.org/phpBB3//view ... =44&t=9931 ...not sure how helpful...

[gordon@drogon.net]

How to use UART on raspberry pi board?Any one can help me about this?.

What do you want to do? It's there and it works like any other Linux serial port. There is no magic there.

If you want a set of relatively easy to use wrappers for the serial port under C, then look for the wiringSerial library that's part of wiringPi.

https://projects.drogon.net/raspberry-p ... l-library/

but these are nothing more than wrappers round the standard stuff that Linux has suported forever.

Do remember that it's 3.3v though, so you may need level convertors.

-Gordon

[thivtulz]

i'm using python.so there's any way to play with UART in raspberry pi

[-rst-]

There is a Python wrapper on top of Gordon's C-library https://github.com/WiringPi/WiringPi-Python - seems to include some serial stuff...

[wallarug]

i'm using python.so there's any way to play with UART in raspberry pi

Code: Select all

sudo apt-get install python-serial

[3gws]

I am using a serial port in my C# Mono program, I have a MAX232 circuit connected to the UART on the PI and which drive the text output from the pi to Hyperterm on the PC and then I have a USB2Serial Converter and a USB GPS device connected to the R-Pi and I am able to read both from both and write to the USB2Port also. I don't have a Display attached to the PI as I already have two displays on my desk along with a tablet and smart phone, I VNC onto the R-Pi.

You can also buy TTL to RS232 converters on the web for about €10.00 which you can attach directly to the R-Pi ( I think there is an example on the home automation forum on this site.)

Mono have a C# environment for the R-Pi, if you search the site you can find details on installing Mono on the R-Pi. Mono does not work fully with Hardware Floating Point versions of Raspian just yet (Hopefully it will be fully supported soon).

Some sample C# code for using a Serial Port :-

mySerial = new SerialPort("/dev/ttyUSB0", 115200);
mySerial.Open(); // open the port
mySerial.ReadTimeout = 60000; //time out 60 seconds

for (int x = 0; x <= 9; x++) // send a message 10 time to the serialport
{
mySerial.Write("This is a test " + x.ToString() +"\r" + "\n");
}

You can use Microsoft Visual Studio Express on the PC to write/Compile the code and transfer the executable file over to the pi using WinSCP.

Regards

3gws

[Mice]

Hey.
Can You share with us a way to read data from port and store in string, for example?

[3gws]

not to sure who your request is directed at, if is is me regarding mono code to read the serial port using c# let me know and I will post it in the next day or two.

Regards

3gws

[Mice]

not to sure who your request is directed at, if is is me regarding mono code to read the serial port using c# let me know and I will post it in the next day or two.

Regards

3gws

t now and is really a

Yes:)
I am fighting with this code right now, but still unsuccessful...

[3gws]

Christopher Landress has a good post on using the serial Port using C# on the R-Pi.

http://www.raspberrypi.org/phpBB3/viewt ... 0&start=50

I hope this help you out.

Regards

3gws.

[thivtulz]

how to find the serial port number of raspberry pi board

[theimmc]

how to find the serial port number of raspberry pi board

If you are running Raspbian, it is /dev/ttyAMA0

[thivtulz]

i'm using wheezy raspbian....so the port number will be same is it....

Here my code..

Code: Select all

import serial
serialport = serial.Serial('dev/ttyAMAO,9600)
serialport.write("My string output to serial port")

My objective is want to display in my pc using uart.thanks

[Devangini]

My pi has debian running on it. What would be the USB port for it? I can see ttyAMA0 in /dev directory but when i write Python code as mentioned in the earlier posts, no data is sent to that port.

[thivtulz]

Is there the python code giving any errors; if not check UART connection cable between RPi and PC.