Data loss when sending to UART.

[prem111]

Hello, when quickly sending to uart .write (several at a time) some data is lost, how can I prevent this?

baudrate: 115200, rxbuf = 250, txbuf = 250

If it keeps 0.15ms interval it is OK. Reducing the baudrate to 9600 does not solve the problem.

micropython: 1.14 (esp32)

Thanks for help.

[tepalia02]

You can get some solutions from this old thread: viewtopic.php?t=6244

[prem111]

You can get some solutions from this old thread: viewtopic.php?t=6244

Changing the rxbuf does not help.

[tepalia02]

Have you tried any other baud rate? For example, 9600?

[prem111]

Have you tried any other baud rate? For example, 9600?

It doesn't help, and it even gets worse. I actually located the problem, unfortunately I do not know the solution. The problem with reading from UART is when I use uart.write at the same time (another task in uasyncio - I'm using StreamWriter and StremReader). The solution would be to block .write for .read time, but I don't know how to do that ...

[pythoncoder]

It would help if you showed us a code sample that exhibits the problem, and also tell us what hardware you're using. I've used StreamWriter and StreamReader quite extensively, including concurrent reading and writing, and not seen this effect. If it can be demonstrated it's a bug that we should report.

[prem111]

It would help if you showed us a code sample that exhibits the problem, and also tell us what hardware you're using. I've used StreamWriter and StreamReader quite extensively, including concurrent reading and writing, and not seen this effect. If it can be demonstrated it's a bug that we should report.

Sorry, it was my mistake, uart async is ok.