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i have found it that asp page.

You need to make sure the port is in "raw" mode.

From a quick look at the libserial documentation, it seems it doesn't have a parameter to set a raw mode. Some options:

• Modify libserial to set raw mode.
• Don't use libserial, and use something else.
• Change the port defaults for your operating system.

The implementation of libserial seems quite basic; you are probably better off using something like Boost.asio.

-Edit. Apologies to @David. I miss-read the name. Thank you for your help.

Thank you @CBCrusher for breaking down the steps to debug the issue.

As OP has narrowed the issue down to the for loop I will help out with a working example.

You are currently loop through the array from 0 -> length. However, you are removing elements inside the loop, this will change the length of the array, (giving you out of bounds errors). The trick to this is looping through the array backwards.

However, if I modify SecondSteps to extend FirstSteps, then my tests stop running completely! Why is that?

You now have two classes that declare steps. And because SecondSteps extends FirstSteps, SecondSteps will declare the same exact steps as FirstSteps. So Cucumber can't decide which steps should be run.

This is a problem for me because I'd like to put some shared step definitions and fields in a base step definition class and then have multiple classes that extend the base class. How should I do this?

If you want to share information between steps you should use a world object. The documentation uses ruby but after adding cucumber-pico as a dependency it works the same way in Java. For a dated tutorial check Sharing state between steps in Cucumber-JVM using PicoContainer

It is not clear what is actually happening but this is solution that seems to work.

It depends on existence of shopt -s checkwinsize and resize on the target board so it isn't a generic enough solution to be the accepted answer.

Also it doesn't provide an insight on how to apply a not runtime fix (by setting the driver defaults or some config in bash).

Ended up solving this out with a break point based solution:

• Made the container a vw * vh size that works on laptop/desktop with a max-width and max-height to prevent unnecessary large rendering
• Then all the inside DIVs positioned using %age values to their right location
• Using @media, created a few sizes where I reset the container width and height to something that will respect the original width to height ration.

I experienced the same issues and it turned out it was a problem of termination and flow control.

I tried different USB dongles, all working with pcs and macs, and many different configurations on the BeagleBone, but nothing worked.

Low-cost USB dongles work well with PCs, but with microcontrollers, such as the BeagleBone, you need something that better handles the bus specifications.

I found out that some simple and low-cost TTL RS232 to RS485 boards work perfectly without any special configuration on the BeagleBone side since they automatically manage flow control. You can search for RS485 automatic flow control on Ebay or similar websites.

Since the default serial port on your BeagleBone is already coupled to the system console, you need to enable another UART by properly editing the file /boot/uboot/uEnv.txt.

Then you need to connect 5V power supply and GND (available on P9_5 and P9_1 pins) and the correct serial pins (i.e. P9_26 and P9_24 if you enabled UART1) to the 5V, GND, RX and TX connectors of the adapter (do not bother with RTS and CTS since the adapter will manage those for you).

In your code change the port name to the new serial port (i.e. /dev/ttyO1 if you enabled UART1).

To easily debug your code, you can connect the USB dongle on a PC and the adapter on the BeagleBone through the RS485 wires and open two serial terminals.

The problem was an incorrect data type (long) in the declaration of the speed parameter for the cfsetspeed function. The datatype for the speed parameter should be uint.

This is the correct code:

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