Wi-Fi signals interference

Wi-Fi congestion is a very complex issue where it is not only a matter of neighbouring wifi networks but also other devices like bluetooth, microwave etc. Bluetooth shares the 2.4 GHz ISM band with other household devices such as cordless telephones, wireless networks, baby monitors, and microwave ovens.
Initial video and or audio transmission delays may occur because of error correction but if it persists you may have wifi interference. Airplay 2 users on a wifi network may read this article on macworld for help.
If you have a strong signal but bad response times then you may have wifi interference or conflicting wifi neighbouring channels and need to change the wifi channel on your router or access point. You may opt to use Auto Wireless Channel, if this is supported by your router configuration, and perform a reboot of your router to determine the free channels.

Read also my recommendations where to put your wifi access point.

StayHome and Listen

I hope you and your loved ones are doing well. It is a time to come to basics, to treasure family values, respect our neighbours and help people. These tracks have been meticulously chosen from my personal music library with titles and lyrics reminding us to stand strong. Stay sane, stay healthy, keep safe and enjoy the music!

If you do not know Spotify you can click here for help.

Smiling is Infectious

Smiling is infectious, you catch it like the flu,
When someone smiled at me today I started smiling too.

I passed around the corner and someone saw my grin
when he smiled I realised I’d passed it on to him.

So, if you feel a smile begin, don’t leave it undetected.
Let’s start an epidemic quick, and get the world infected!

I thought about that smile, then realised its worth
a single smile, just like mine could travel round the earth.

(Spike Milligan)

R7000 LED Control

Use the ‘Administration’ -> ‘Commands’ feature to run the LED controls commands.


LED Control on my R7000 (build 39960M) was successful with the following commands:

# Disable WAN and LAN LEDs
et robowr 0x0 0x18 0x1ff
et robowr 0x0 0x18 0x0
et robowr 0x0 0x1a 0x0

# disable WPS button LED
gpio disable 14

# disable WLAN button LED
gpio disable 15
gpio disable 16

# turn off 2.4GHz LED
gpio enable 13

# turn off 5GHz LED
gpio enable 12

# turn off power LED white
gpio enable 2

Configure a Guest WiFi network

Configure a Guest WiFi network with dd-wrt firmware
Refer to the the tutorials:
Guest Network on the DD-WRT Wiki‘ and
Guest WiFi + abuse control for beginners

My objective of a guest network is to offer isolated, yet protected, access to the Internet. Guest users should not have access to my private LAN. This can be achieved with the following settings:
Wireless Basic Settings (‘Virtual Interfaces’): AP isolation enabled.
Network Configuration: Unbridged, NAT enabled.
You will need to assign a dedicated network range and enable DHCP.

dd-wrt wireless settings

Wireless settings used, based on other user’s recommendations.
Read also the dd-wrt.com wiki.

Basic Settings:
Regulatory Domain
– BE (obviously change this to your country’s setting)
Regulatory Mode – off
TPC Mitigation Factor – 0

(2.4ghz)
Wireless Mode – AP
Wireless Network Mode – NG-Mixed
Wireless Channel – 1, 6, or 11 (use the least crowded in your area, see note1)
Channel Width – 20mhz
Optimize Multicast Traffic – enabled
TurboQAM – enabled
Explicit Beamforming – enabled
Implicit Beamforming – enabled
Airtime Fairness – disabled (this currently causes wireless dropouts over time)

(5 ghz)
Wireless Mode – AP
Wireless Network Mode – AC/N-Mixed (unless you have only AC clients or are still relying on wireless-A)
Wireless Channel – Auto (or the least crowded. DD-wrt exposes the middle frequencies under 149 and above 48 as selectable [per DFS preemption], see note1)
Channel Width – 80mhz
Extension Channel – Upper Lower (depends on the channel you use. lower lower for above 149, upper upper for below 48 )
Optimize Multicast Traffic – enabled
Explicit Beamforming – enabled
Implicit Beamforming – enabled
Airtime Fairness – disabled (this currently causes wireless dropouts over time)

note1:
In the 2.4 GHz band, 1, 6, and 11 are the only non-overlapping channels. However, I use Auto Wireless Channel and weekly reboot the router to determine the free channels.
Read also the recommended settings by Apple.
Read also my recommendations where to put your wifi access point.

Wireless Security:
WPA2 Personal with AES only (unless you run a RADIUS server or something, in which case choose enterprise..)

Advanced Settings (both bands):
Basic Rate
– All
Transmission Rate – Auto
CTS Protection Mode – Auto
Frame Burst – Disabled

Advanced Settings (5ghz):
Beacon Interval – 100 (set this a bit higher to save mobile clients some battery. Not too high so that wireless client’s don’t drop out from missed beacons)
DTIM interval – 1 (can be set higher for battery saving of mobile clients, but since it works in tandem with beacon interval, it can cause drop outs if set too high as well, use 1 if beacon interval is set to 100)
Fragmentation Threshold – 2346
RTS Threshold – 2347
Max Associated Clients – 128 (Personal preference. Say you want to restrict a certain number of IP’s for wired clients only. This setting would prevent wireless clients from taking all the IP addresses in the address range from the DHCP server)
AP Isolation – Disabled
TX Antenna – Auto
RX Antenna – auto
Preamble – Short (Long is for compatibility with older wireless devices. Most everything within 15 years works with short)
Shortslot Override – Short (another compatiblity setting that affects G-clients in relation to older B-clients. Reduces the time in between sending packets to clients after collisions)
TX Power– Auto (This will change as needed for the client while obeying regulatory domain)
Bluetooth Coexistence Mode – Preempt (tells a bluetooth client which 2.4ghz channel the router is using to avoid transmitting on that frequency)
Wireless GUI access – enabled (else your wireless clients can’t configure the router)
Radio Time Restrictions – Disabled (personal preference)
WMM Support – enabled (Wireless-N and newer require this for higher transmission rates)
No-Acknowledgement – enabled (I use disable to avoid frequent throughput drops from a noisy wireless environment)

Linksys EA8500 Wi-Fi Router

Linksys EA8500 Max-Stream™ AC2600 MU-MIMO Smart Wi-Fi-router

Radiofrequenties: 2,4 en 5 GHz
Ports: Internet, Ethernet (1-4), USB 3.0, USB 2.0/eSATA

The EA8500 has a 1.4GH dual-core processor with 512MB of RAM and 128MB of flash memory. The router has Qualcomm’s QCA9980 MU/EFX Mu-MIMO radio chip.

Peak 802.11ac Performance: 265 Mbps
Range in 2.4-GHz Mode: 50 m

The EA8500 has a 1.4GH dual-core processor with 512MB of RAM and 128MB of flash memory. The router has Qualcomm’s QCA9980 MU/EFX Mu-MIMO radio chip.