Slow upload

dc42

It may also be worthwhile trying a different WiFi channel.

core3d.tech

@dc42 just switched back to Asus and tried different channels. before it it was 3, I tried, 2 which had no change, tried channel 4 which got better but still sub 200KiB/s. Tried 7 and again baqd news. Channels do seem to make a difference but still nothing that say, yep fixed it.

Also tried pointing the antennas in different directions (to no avail).

core3d.tech

last update on this. My internet was just out and as part of the usual exercise I turned off modem and router and now that everything is back up speed is in the 600s. I have turned off the router before but this time seemed to have done the magic

gnydick

Just curious, what is the expected network throughput on the Maestro? I get 660KB/sec (I think it's B and not b) so roughly 5mbit. The SD card I have is super fast when plugged into my computer, so just wondering if the network interface on board is the bottleneck or the SD card drive on the board?

dc42

@gnydick said in Slow upload:

Just curious, what is the expected network throughput on the Maestro? I get 660KB/sec (I think it's B and not b) so roughly 5mbit. The SD card I have is super fast when plugged into my computer, so just wondering if the network interface on board is the bottleneck or the SD card drive on the board?

If you are running firmware 2.02 then you can send M122 P104 to measure the SD card write speed. The optional S parameter is the file size in Mbytes, default 10. I've just measured it on my Crane Quad and it reports 0.99Mbytes/sec for a 10Mb file and 1.23mb/sec for a 40Mb file. The firmware doesn't yet read network data and write to the SD card concurrently, so the upload speed will be slower. I just measured it at 510kbytes/sec for a 14Mbyte file.

You may get a better upload speed if you use a better SD card.

There are two reasons why writing to the SD card may appear to be faster on your PC:

Your PC has much more RAM, so it can write much larger chunks of data, which helps maintain write speed;
When you copy a file, at the point at which the write appears to have finished, there may be data still being written from the cache to the card. If you copy large files to the SD card on a PC and then ask to eject the card as soon as the copy appears to be finished, it may be a little while before the PC tells you it is safe to remove the card.

resam

My results:
SD write speed for 10.0Mbyte file was 1.11MBytes/sec
and
SD write speed for 40.0Mbyte file was 1.14MBytes/sec

With typical uploads speeds also in the 500-600kB/s range.
WiFi signal strength -69dBm
SD card longest block write time: 72.5ms, max retries 0

gnydick

@dc42 I totally know why the PC is faster, I was just letting you know it is a fast card, so it isn't the bottleneck

Nyles

Turns out it wasn't the SD card, it was the WiFi connection. Out in the shop I was seeing about -76dBm and getting transfer speeds of 20 to 50Kbps. Now with a WiFi extender I'm seeing about -61dBm, and over 500Kbps.

dc42

Thanks, I'll mark this thread as solved.

core3d.tech

@dc42 Don't think this is really solved. Just that it's not the card. My Asus Router in the same room gets lousy 30-90Kb/s whereas my Netgear accross the house gets 400+ rates. At one point I did a reboot of my Asus and for half a day I got 500+ to only see it go down to sub hundred again.

Phaedrux

@core3d-tech Are there any firmware updates for the Asus router?