Re: [time-nuts] time sync from cellphone TO microcomputer

2015-11-22 Thread Esa Heikkinen
Jim Lux kirjoitti: While this is trivial with a GPS receiver, we were thinking about a very minimalist implementation, with a smart phone as the control interface. Forget the smart phone - at least if it's un-rooted Android. I'm not sure how the default time sync is done, it's either by

Re: [time-nuts] time sync from cellphone TO microcomputer

2015-11-22 Thread Attila Kinali
On Sun, 22 Nov 2015 11:08:50 +0200 Esa Heikkinen wrote: > > While this is trivial with a GPS receiver, we were thinking about a very > > minimalist implementation, with a smart phone as the control interface. > > Forget the smart phone - at least if it's un-rooted Android. I'm

Re: [time-nuts] time sync from cellphone TO microcomputer

2015-11-21 Thread Attila Kinali
On Fri, 20 Nov 2015 15:47:27 -0800 Jim Lux wrote: > While this is trivial with a GPS receiver, we were thinking about a very > minimalist implementation, with a smart phone as the control interface. So, some electronics with a micro controller that do the actual

[time-nuts] time sync from cellphone TO microcomputer

2015-11-21 Thread Mark Sims
Check out the ESP8266 based wi-fi modules. They are dirt cheap (< $5) and tend to have excellent range. Sparkfun has some that are nice (and more expensive) that break out all the processor pins. The ESP8266 is a 32-bit processor with on-chip wifi. The ESP8266 are now supported in the

Re: [time-nuts] time sync from cellphone TO microcomputer

2015-11-21 Thread Nick Sayer via time-nuts
> On Nov 21, 2015, at 2:43 AM, Attila Kinali wrote: > > > MFi means here "Made for iPhone" which is Apples way of extorting money > from device manufacturers. You have to buy an Apple crypto chip for that > and put it in each device. And they wont talk to you unless you buy a

Re: [time-nuts] time sync from cellphone TO microcomputer

2015-11-21 Thread Jim Lux
On 11/21/15 2:43 AM, Attila Kinali wrote: On Fri, 20 Nov 2015 15:47:27 -0800 Jim Lux wrote: While this is trivial with a GPS receiver, we were thinking about a very minimalist implementation, with a smart phone as the control interface. So, some electronics with a

[time-nuts] time sync from cellphone TO microcomputer

2015-11-20 Thread Jim Lux
A couple of us were kicking around the idea of a low cost JT65-like HF modem implementation, which requires that the station be synchronized to 1 second. While this is trivial with a GPS receiver, we were thinking about a very minimalist implementation, with a smart phone as the control

Re: [time-nuts] time sync from cellphone TO microcomputer

2015-11-20 Thread Hal Murray
jim...@earthlink.net said: > Say you wanted to "set the clock" on an Arduino or embedded processor. > Could you do it via a wireless (or, I guess, a wired connection). I don't have a cell phone to experiment with, but I do have a Raspberry Pi connected via WiFi. Ping times are a bit over 3