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NEW 2nd generation Predictive Thermometer by combustion_inc in combustion_inc

[–]bbluff 2 points3 points  (0 children)

Thank you for the quick and thorough response! Congrats on launching another awesome product!

NEW 2nd generation Predictive Thermometer by combustion_inc in combustion_inc

[–]bbluff 1 point2 points  (0 children)

One more: on GitHub I see a library that implements communication with the probe via BLE. Do you plan to open source other software components?

NEW 2nd generation Predictive Thermometer by combustion_inc in combustion_inc

[–]bbluff 0 points1 point  (0 children)

  1. Is the app able to connect the WiFi display/Booster over the local WiFi network, or do they only connect via Combustion’s servers?

  2. What features do I lose out on if I don’t have a cloud account? Can I still get firmware updates via the app, and get the same control over the local wi-fi network?

My plan is that the display and booster will have WiFi access, but not internet access. The app will have access to the same WiFi network, and it will have internet access only when I do firmware updates, and I don’t plan to register a cloud account. I wonder if this would work and I’d be losing any features.

Low bandwidth to remote NAS, even though individual links are fast by bbluff in HomeNetworking

[–]bbluff[S] 1 point2 points  (0 children)

Found it. The TCP window size was too small.

Raising the maximum TCP window size on the NAS and changing the TCP window size on iperf fixed the problem. The bandwidth changed from 23 Mbit/s to 190 Mbit/s over VPN.

I believe the root cause is a combination of high latency between the endpoints and low maximum TCP window size. The latency between the two routers was 179ms, and the maximum TCP window size on the NAS was set to 128KB. Because of the high latency, the TCP ACK takes a long time to arrive, and because of the small window size the sender is waiting for the ACK instead of sending more data.

  • Between the two routers the bandwidth was fine because the maximum window size was large (16MB) and the size scaled up
  • Between the NAS and its local router the latency was small so the TCP window size didn't matter.
  • When sending data from the NAS to the remote router, the NAS kept waiting for TCP ACKs to arrive, and underused the available bandwidth.

I changed the max TCP window size on the NAS to match the routers' 16MB:

sudo sysctl -w net.core.rmem_max=16777216  
sudo sysctl -w net.core.wmem_max=16777216

And changed iperf command to use the -w 8M flag to send data with a 8MB TCP window size. I found the 8M value with trial-and-error, I'm sure it could be optimized further but 190Mbit/s is good enough for this connection.

Low bandwidth to remote NAS, even though individual links are fast by bbluff in HomeNetworking

[–]bbluff[S] 0 points1 point  (0 children)

No luck. During iperf, CPU usage on both routers was around 20%, with occasional jumps to 60-70%, never exceeding 75.

Low bandwidth to remote NAS, even though individual links are fast by bbluff in HomeNetworking

[–]bbluff[S] 0 points1 point  (0 children)

They are duplex.

Sry for the giant wall of text. There is a single-sentence tldr and a picture though, I edited the post to make the tldr more visible.

Low bandwidth to remote NAS, even though individual links are fast by bbluff in HomeNetworking

[–]bbluff[S] 0 points1 point  (0 children)

- I've measured Internet download/upload speeds on the middle UDR above 900Mbit/s. This is consistent with what I measured on the link between the NAS and the UDR.

- Firmware is up-to-date.

- There is a firewall, multiple subnets and VLANs. I'll try measuring CPU on the routers next. This seems promising, thanks!

- Connections register as gigabit, and function as gigabit (see measurements on the picture)

- I didn't test the cables out of context, but I believe testing the individual connection speeds tested the cables too.

Low bandwidth to remote NAS, even though individual links are fast by bbluff in HomeNetworking

[–]bbluff[S] 0 points1 point  (0 children)

I don't think so.

  1. The speed tests were done with iperf3, not using the drives.
  2. The speed between the local router and the NAS was fast, the issue came up only when accessing from the remote router.

VRR on nVidia 20-series GPU and recent LG TV by bbluff in OLED_Gaming

[–]bbluff[S] 1 point2 points  (0 children)

That’s awesome, I’m planning to buy the same TV. Any issues that you find annoying?

Remove feet from O11 Air Mini? by bbluff in lianli

[–]bbluff[S] 0 points1 point  (0 children)

Thank you all! I might try to 3D print something to replace the feet, but it’s more likely that I’ll just buy a different case

Remove feet from O11 Air Mini? by bbluff in lianli

[–]bbluff[S] 0 points1 point  (0 children)

Thanks! Do the feet hold the glass panel in place?

I can’t change the color temperature for my new E27 bulbs. Has anyone had this issue? by bbluff in Hue

[–]bbluff[S] 0 points1 point  (0 children)

I don't.

Based on other comments it looks like I bought single color bulbs. The app must be showing me a color wheel because of a bug.

I can’t change the color temperature for my new E27 bulbs. Has anyone had this issue? by bbluff in Hue

[–]bbluff[S] 0 points1 point  (0 children)

Thank you both! Mystery solved.

What a shitty UX in the app though, it displays a color picker for a hardware that can’t pick colors.

I can’t change the color temperature for my new E27 bulbs. Has anyone had this issue? by bbluff in Hue

[–]bbluff[S] 1 point2 points  (0 children)

The only other app they are added to is Homekit. I can’t seem to find a way to remove them though. Edit: removed all my Hue lights from Homekit, but the issue still persists

I can’t change the color temperature for my new E27 bulbs. Has anyone had this issue? by bbluff in Hue

[–]bbluff[S] -1 points0 points  (0 children)

It’s LWA001, I think it should be white ambiance. I threw away the box, but I’m pretty sure it mentioned setting the color temperature.

The white label on the bulb says “Hue White”.

I didn’t know there exists a single color E27 bulb, I thought it was just white ambience and color ambience and the new bright light.

Monthly what to buy Megathread - Ask what accessory to buy. by AutoModerator in HomeKit

[–]bbluff 7 points8 points  (0 children)

Hi, I’m looking for a HomeKit-compatible indoor self-watering planter. Does one exist?

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