[En-Nut-Discussion] TCP Retransmissions too fast by PC

[Ralph Mason]

Brett Abbott wrote:

> Hi
>
> Over a slow and performance variable network link like GPRS, we are 
> finding that the PC/Boradband Internet side of the link often gets too 
> impatient and will often send a retranmission of  a TCP packet.  At 
> the ethernut end, this often appears as a duplicate packet received 
> shortly after it has sent the ACK.  It copes ok but isnt ideal.
>
> Does anyone know of how we might better train the VB .NET application 
> to instruct/override the TCP socket to wait longer for an ACK before 
> re-sending a packet?  Cant seem to find a way to override the 
> Automatic RTTO setting.
>
Yes use UDP, it's much better for M2M type long term data reporting 
applications.