[kwlug-disc] Cheap UPS [Was: Re: Extending WiFi Range]

Sun Apr 2 13:14:54 EDT 2017

On sale at the time were CyberPower 425VA's, for something like $25-35. 
Haven't seen them since / that small / that cheap. Routers, switches, 
VoIP, etc. don't draw that much power.

http://www.shopbot.ca/m?q=cyberpower+425va&sort=price

Cheapest I see at the moment is $60 
http://www.canadacomputers.com/product_info.php?cPath=32_438&item_id=101960 
or 
http://www.canadacomputers.com/product_info.php?cPath=32_438&item_id=085747 
. First is APC and battery user replaceable it seems, second is 
CyberPower and not.

Some caveats:

- 2 of 3 have since failed (after a few years), but I would buy 
CyberPower again. Even failed they're superior surge suppressors.

- watch for user replaceable batteries, i.e. have a battery cover. == 
more expensive. Not that I care, undo 5 screws, within is a 'standard' 
battery - it's the case hatch to it that brings the expense. (Or rather, 
really, being user replaceable means an inner compartment completely 
walled off from the rest of the guts, and brings with it some warranties 
/ regulatory requirements for safety - it's the liability insurance the 
manu carries that brings the significant additional expense.) On these, 
I dremelled out some internal plastic fingers of the case and put in the 
larger battery the case was obviously designed for.

- batteries at http://www.batterywholesale.ca/ on Lawrence. Really good 
/ helpful guy.

On my VoIP, since the cordless base it is connected to also needs to be 
house-central, I ended up plugging it / them into the bigger UPS on my 
TV (APC Back-UPS ES 725 - bigger version / same style as the 
CyberPowers). Losing power for less than 5 minutes on the PVR, Bell hub 
and/or router, is a PITA. My cable modem is still there too, for that 
matter - right beside my wi-fi / OpenWRT. The smaller UPS' above went on 
switches / computers elsewhere in the house. e.g. Where wires come into 
the house - vs the bigger Tripp Lite online (all power conditioned all 
the time) UPS on my main workstation across the room. Read: with noisy 
fans. [http://www.shopbot.ca/m?q=tripp-lite+SU750XL&sort=price]

On 04/02/2017 12:22 PM, Khalid Baheyeldin wrote:
> Yes, there are cables going up in various rooms (the joy of an unfinished
> basement), and they are all hidden from view.
>
> The one I ended up using is the one that goes to the VoIP device.
>
> The cable was plugged into the new router, and the VoIP device was plugged
> into another of the new router's LAN ports.
>
> The next step is a small UPS so the VoIP device is UPS protected too. If
> you see one like the ones you bought, let me know.
>
> On Sun, Apr 2, 2017 at 12:14 PM, B.S. <bs27975.2 at gmail.com> wrote:
>
>> So you do / did have one ethernet cable to tap into above the basement.
>> Must have missed that.
>>
>>
>> JJ's post gave me a D'OH! moment within a few lines ...
>>
>> The (original) issue may not be the router getting out, but the much less
>> powerful dongle getting back in.
>>
>>
>>
>> On 04/02/2017 12:03 PM, Khalid Baheyeldin wrote:
>>
>>> Here is a followup on the issue.
>>>
>>> First regarding JJ's post. The issue is not 'reception'. The issue is
>>> 'coverage', 'strength', and 'stability'. The backyard had some coverage,
>>> but it is weak and intermittent. Not a stable connection for what I want
>>> to
>>> do (basically control a camera connected to a telescope). The WiFi router
>>> is in the basement, and perhaps blocked by the concrete walls, and/or the
>>> I
>>> beams interfering. So the solution I had in mind from the beginning is to
>>> have another AP station upstairs closer to the back of the house, and
>>> higher up, rather than in the centre of the basement.
>>>
>>> Now for what ended up working for my case:
>>>
>>> I got another router, put OpenWRT 15.05.1 on it and connected it to an
>>> ethernet cable that runs from the basement (where the main router is). The
>>> connection is via one of the LAN ports, not the WAN port.
>>>
>>> I put a separate SSID on it, and gave it an address on the same subnet.
>>>
>>> Then disabled DHCP and the Firewall on it.
>>>
>>> The basic steps are under the Web LuCI section here:
>>>
>>> https://wiki.openwrt.org/doc/recipes/dumbap
>>>
>>> The only thing that I added to the above steps is add the main router's IP
>>> as a default gateway.
>>>
>>> It works well. There is good coverage for the far end of backyard. And
>>> this
>>> is done without having to deal with outdoor cables, nor run a cable up and
>>> another down and move the main router to the main floor, and get a UPS for
>>> it.
>>>
>>> For the sake of completeness, I am listing other stuff that found on
>>> OpenWRT. None of them do what I want, but related in case someone needs
>>> it.
>>>
>>> There is a whole bunch of info in the recipes section of OpenWRT's wiki,
>>> with relayd, routed, bridged, ...etc. And there are limitations, ...etc.
>>> This may be helpful for other cases.
>>>
>>> https://wiki.openwrt.org/doc/recipes
>>>
>>>
>>>
>>> On Sun, Apr 2, 2017 at 11:02 AM, <jvj at golden.net> wrote:
>>>
>>> All
>>>>
>>>> I have skimmed through the emails in this thread and am impressed and
>>>> intrigued by the depth of the knowledge on this issue.
>>>> However, for some of the newbies in the group/list I will mention a
>>>> possible common error in the premise of the OP's original post.
>>>>
>>>> The OP starts out with "WiFi reception in my house ...".
>>>>
>>>> And herein in the error. (Or maybe not. )
>>>>
>>>> As with cell phones many use the term "reception" when referring to
>>>> performance the device, e.g. cell phone, notebook, laptop, etc. They
>>>> forget
>>>> that there may be "reception" issues a the other end whether the other
>>>> end
>>>> is a wifi router or cell tower. The device is, after all, a two way
>>>> instrument, both an RF receiver and a RF transmitter. RF signals are
>>>> transmitted from the device and are received at the wifi router or cell
>>>> tower.
>>>>
>>>> Efforts to increase the RF transmission signal strength at the wifi
>>>> router
>>>> to "increase range" will not address any problems of RF transmission at
>>>> the
>>>> device.
>>>>
>>>> There have been some good suggestions that may address issues with the
>>>> two-way RF transmission/reception. One or more contributors mentioned
>>>> relocating the router (with its antennae) and/or addressing any
>>>> impediments
>>>> in the environment which may serve to attenuate RF signals. At least one
>>>> contributor mentioned repeaters or mesh networks.
>>>>
>>>> I will guess that there is not really much anyone can do with software in
>>>> the wifi router to improve the two-way RF transmission/reception in the
>>>> router or device for that matter. The RF modulation/demodulation is
>>>> performed in the chip set and this may be locked into the chip set. Of
>>>> course, chip set drivers may be available and may help.
>>>>
>>>> John Johnson
>>>> With apologies to the OP.
>>>>
>>>>
>>>> ------------------------------
>>>> *Subject:* [kwlug-disc] Extending WiFi Range
>>>> *Date:* Wed, 29 Mar 2017 19:29:33 -0400
>>>> *From:* Khalid Baheyeldin <kb at 2bits.com>
>>>> *To:* KWLUG discussion <kwlug-disc at kwlug.org>
>>>> *Reply-To:* kb at 2bits.com, KWLUG discussion <kwlug-disc at kwlug.org>
>>>>
>>>> WiFi reception in my house, using the OpenWRT powered D-Link DIR-835, is
>>>> generally adequate, but could be better in some spots. Reception is
>>>> intermittent in the backyard, where I am pondering a project that would
>>>> need it. Perhaps the basement's concrete is interfering?
>>>>
>>>> I like OpenWRT and plan to stay with it. Also the router itself has lots
>>>> of storage (flash) and RAM, so will be here for the future. It is in the
>>>> basement, near the cable modem, and other equipment, and connected to the
>>>> UPS in there.
>>>>
>>>> Moving it to the main floor is not likely since it would involve finding
>>>> a
>>>> power outlet and running Ethernet, as well as losing the UPS connection.
>>>>
>>>> So, my questions are:
>>>>
>>>> 1. What does one do in this case? Do you buy another router, possibly one
>>>> capable of running OpenWRT and turn off the router features, and keep it
>>>> only as a WiFi hotspot and put it near the spots where good reception is
>>>> needed?
>>>>
>>>> 2. If so, what are good routers that you tried this on?
>>>>
>>>> 3. How did you turn off OpenWRT routing ...etc. on it?
>>>>
>>>> 4. Does the new WiFi hotspot have its own SSID or can it use the same
>>>> SSID
>>>> as the main router?
>>>>
>>>> Any other thoughts/ideas welcome.
>>>>
>>>
>> _______________________________________________
>> kwlug-disc mailing list
>> kwlug-disc at kwlug.org
>> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>>
>
>
>
>
>
> _______________________________________________
> kwlug-disc mailing list
> kwlug-disc at kwlug.org
> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>