Reading serial data from turbine controller

SlvrSky07

Hello, I’m trying to figure out how to read the data from my wind turbine controller. I would like to read it using python as possible to use the data as variables in a script.

Right now it connects to my pc and shows the data using the program that came with the device. It connects to the pc com port at 2400bps displayed in the program but windows shows 9600 , not sure what’s up with that.

It uses a Rs232 to usb adapter for connection. The only thing it says in the manual about it is this: RS232 (5V level ) ( standard)

When I use pyserial or terminal in windows I never get any data from it to view.

Any suggestions on how to get the data?

ozmo

Ignore that windows setting - its overwritten when you use code or app.

Note also only one app can access a com port - so you need close any other app trying to access it.

This is not optimal - but might get you started...

import serial, time

ser = serial.Serial('COM6', 2400) # comport and baud set here - other "n,8,1" settings are already the default

while 1:
    serial_line = ser.readline()

    print(serial_line)
    # Do some other work on the data

    time.sleep(1) # sleep if required
    # End Loop

ser.close() # Only executes once the loop exits(in this example - never)

SlvrSky07

Thanks for the reply, I used the code but it just gets a blank output.

I also tried it on a raspberry pi (changing it to /dev/ttyUSB0 of course) same outcome.

The controller should just be transmitting the data with out a command from the program correct?

The windows program gets the changes in voltage from the controller about every second so I’d think I’d see some kind of output.

kirving

Generally, you would need to interrogate the controller to get a response from it, so the program is likely doing that in the background.

For the controller, is there a list of available commands published? If not, can you use something like below to capture the comms going back and forth so you can replicate yourself? https://www.eltima.com/products/serial-port-monitor/

SlvrSky07

https://www.boards.ie/discussion/comment/120102743#Comment_120102743

I was thinking it has something to do with that. I am familiar with modbus polling so I thought I might need a register chart of some sort for this. I do not have any commands for it, the manual was hard enough to get from the manufacturer and I doubt they would release any other information.

With using the monitor program would it display the commands and response in plain text or binary/hex?

SlvrSky07

It looks like the data keeps repeating itself. Could you tell me where to start with this data?