I can of course close the port and try and open it again, but instead I would like to detect whether the device is still connected to the bluetooth serial port.Īlso, calling serial.close() on a serial port on OSX causes a momentary freeze (desktop cursor freezes), I suspect 100% cpu usage, this does not happen on windows and I therefore want to minimize the number of port opens and closes that I have to do as I am polling data from around 10 bluetooth devices once a minute.Īs it takes up to 4 seconds to open a serial port, the best solution would be to use a direct HID connection to the bluetooth radio instead of a SPP serial connection, however it appears that nobody has ever connected realbasic to a bluetooth HID device before and so there's no info or help on it. I have start and end characters which I listen for and all of this works fine, until the bluetooth device goes out of range and effectively disconnects leaving the serial port still open.
The serial port is a bluetooth serial port, it is talking to a bluetooth radio which in turn talks to a microcontroller.
So is it possible to detect whether a port is open and alive so that I can leave the port open and only close and re-open it when I detect that the connected device has gone away. It's highly possible that the serial device disconnected from an opened port, and of course this is going to cause problems. My initial idea was to open the port, read the data and then close it again, The problem is, that opening a serial port can take up to 4 seconds and I may need to read from up to 8 ports, so opening and closing the port is not practical for each cycle.
It supports inheritance, interfaces, polymorphism.Xojo is a modern, object-oriented language.You can use one powerful language to create your web app instead.Read data from the analog pins on the Arduino. You can use one set of source code to support multiple platforms. It took me less than an hour to whip together a crude prototype that let me achieve four goals: Pick an Arduino (or any serial device) from a list of COM ports.
You can make commercial software products.Secondary-level and college students in schools all over the world are introduced to programming with Xojo.
Xojo for mac crack users all over the world, Xojo apps can be found in every conceivable category from commercial software applications to use in governments, universities, businesses, and the Fortune 500. Xojo 2019 Mac is a cross-platform software development tool that enables developers of all backgrounds to create software for OS X, Windows, Linux, the Web, and soon, mobile.