B4J Question Several COM-ports at the same time - possible ?

[peacemaker]

Hi, All

Anyone tried to use several COM-ports at the same time in B4J ?

I'm trying, and more over - trying to make the baudrate autodetect. And it's successful - one port is opened with 9600 baud, another - 115200, and first data packet from each port is decoded under the chosen baudrate, and it's congratulation that connected correctly, but ... after these 2 connections - only one port is going on streaming data.
The second connected port gives silence, but sometimes they both work together, as expected.
Unstable work.
Maybe any suggestion how better to control COM-ports ?

 

[Erel]

Are you using multiple instances of Serial + AsyncStreams?

Best to implement it in a class and create a class instance for each connection.

 

[peacemaker]

multiple instances of Serial

Yes. Each is created in the class dynamically.
Root usb_devices class detects COM-ports list, and creates instances of the use_serial_device class where this port is opened, baudrate is changed, waiting for data from AsyncStreams, and switching the baudrate if no data for several seconds.

 

[Erel]

I expect it to work. Are you creating multiple instances of this class?

 

[peacemaker]

I expect it to work

Yes, solved ! Unstable work was due to at COM-port losing or adding - i was reconnecting all the ports.
If to manage ports only one by one - no any trouble: each COM-port is able to work at any detected baudrate and together with others already working ports.
Resume: do not break already working OK piece.

p.s. but now i understand why USB was invented