Hi Oleg, Did you try to tune the configs? Try to increase the buffers size, etc.
BR, Alan On 8/4/22, Oleg <ev.m...@gmail.com> wrote: > Hi all, > > I'm working with a custom stm32f767 based board and px4 project fork with > nuttx-10.0.0+ and uploading data (~900KB) to the board using mavlink_ftp. > > If mavlink is over serial port everything is fine and long transfer going > uninterruptedly, but if mavlink is over UDP link the ftp file transfer > sometimes stumbles: PC doesn't receive acknowledgment, wait for timeout, > retry request and continue to transfer normally some time until next > stumble. > > According to mavlink_ftp debug, at that moment the board doesn't receive > the last ftp mavlink package, so it doesn't send ack. I've checked with > wireshark, a PC definitely sends a UDP packet out, but the board doesn't > receive this mavlink packet. > I can reproduce this issue easily, but didn't notice any regularity in the > size of data between losses. > > When I've added DEBUG_FEATURES, DEBUG_ERROR, DEBUG_NET, DEBUG_NET_ERROR to > config I can't reproduce the issue, no loss in UDP transfer. > > Mavlink FTP upload is quite simple: on each request there is the > acknowledgement, no burst sending, so, as I see it, the issue should not be > related to buffer overflow. > > Any thoughts on how to debug this or maybe someone remember potentially > related fixes in UDP/Ethernet in recent NuttX? Thanks in advance for help! > > --- > With best regards, Oleg. >
