[time-nuts] Lowest Power NTP Server

[Bob kb8tq]

Hi

Wired is out for this particular setup. It needs to be some sort of wireless. It all would 
be *much* more simple with wires. 

Bob

> On Dec 2, 2019, at 12:46 PM, Robert LaJeunesse <lajeunesse at mail.com> wrote:
> 
> If wired Ethernet seems to be the way to go consider the Orange Pi Zero - about the cheapest wired Ethernet board available that runs Linux. Ethernet is via on-chip MAC and phy, so no USB path delays. http://www.orangepi.org/orangepizero/
> 
> Plenty of support exists on the web, for example: https://lucsmall.com/2017/01/19/beginners-guide-to-the-orange-pi-zero/
> 
> Bob L.
> 
>> Sent: Monday, December 02, 2019 at 9:56 AM
>> From: "Tim Shoppa" <tshoppa at gmail.com>
>> To: "Discussion of precise time and frequency measurement" <time-nuts at lists.febo.com>
>> Subject: Re: [time-nuts] Lowest Power NTP Server
>> 
>> Bob, I find that 2.4GHz Wi-Fi UDP latency with ESP8266 will frequently be
>> tens of milliseconds and is never/rarely consistent.
>> 
>> There are specialized non-WiFi 2.4GHz systems for time distribution that
>> are far more consistent (possibly even at the tens of microseconds). I
>> think several years ago on this list, we were talking about tricking
>> commodity WiFi chipsets into doing these but haven't seen anything as of
>> late.
>> 
>> Tim N3QE
>> 
>> On Mon, Dec 2, 2019 at 8:02 AM Bob kb8tq <kb8tq at n1k.org> wrote:
>> 
>>> Hi
>>> 
>>> Indeed, if you get up into the “many tens” of  ms, that rules it out in my
>>> application.
>>> A consistent 90 ms would be ok, you could compensate for that. Random
>>> flopping
>>> from 4 to 90 … not so much.
>>> 
>>> It seems like that sort of jitter would get in the way of a lot of things.
>>> I guess that just
>>> shows how little I know about a lot of things :)
>>> 
>>> Bob
>>> 
> 
> 
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