Search found 163 matches

by MostlyHarmless
Thu Jan 09, 2020 7:25 pm
Forum: Programs, Libraries and Tools
Topic: GPS based NTP time server
Replies: 2
Views: 740

Re: GPS based NTP time server

Great idea. But whats about ready to use products like https://www.adafruit.com/product/3133 Looks like engineers think alike ;) Note that that board isn't a ready to use NTP server. It is the GPS module and the DS3231 synced to it in one breakout board. You will still need something running an NTP...
by MostlyHarmless
Thu Jan 09, 2020 7:20 pm
Forum: Programs, Libraries and Tools
Topic: ntpclient - uasyncio based NTP synchronization
Replies: 14
Views: 2571

Re: ntpclient - uasyncio based NTP synchronization

...why are the RTC so inacurate?... It's hardware dependent. I believe the one on ESP8266 does not use a crystal oscillator, so it's wildly inaccurate. That on a Pyboard 1.x can be calibrated to within a couple of minutes a year. This is my understanding too. On the ESP8266 the RTC is completely dr...
by MostlyHarmless
Thu Jan 09, 2020 7:00 pm
Forum: Programs, Libraries and Tools
Topic: GPS based NTP time server
Replies: 2
Views: 740

GPS based NTP time server

In addition to the ntpclient project I am also researching in the direction of building a "cheap" local NTP server, based on the ESP32 chip and a few other components. One reason being that commercial, GPS based NTP servers still cost upwards of $300. That looks wrong to me. The last components I bo...
by MostlyHarmless
Thu Jan 09, 2020 5:30 pm
Forum: Programs, Libraries and Tools
Topic: ntpclient - uasyncio based NTP synchronization
Replies: 14
Views: 2571

ntpclient - uasyncio based NTP synchronization

Inspired by another thread about ntptime and its limitations I have created a new module, ntpclient . This is work in progress. At this point it works reasonably well on ESP32 and to some degree on ESP8266. Both implementations very much benefit from a local NTP server, which is rather simple to set...
by MostlyHarmless
Thu Jan 09, 2020 1:52 pm
Forum: ESP32 boards
Topic: asynycio as_GPS
Replies: 56
Views: 8220

Re: asynycio as_GPS

Maybe it makes sence to create a german sub forum here? Ich fänd das toll I do not agree - Ich stimme dem nicht zu. A fragmentation of the forum is of no benefit for anyone. Information will get lost. I second that. There will always be the an exception made when someone needs help but cannot expre...
by MostlyHarmless
Thu Jan 09, 2020 2:41 am
Forum: Programs, Libraries and Tools
Topic: esptool error when building esp8266
Replies: 6
Views: 1130

Re: esptool error when building esp8266

Docker woks to some degree and I love putting all sorts of things into containers (FreeCAD, KiCAD, Prusa-Slic3r, you name it), but in the end I went a completely different route for MicroPython development. A dedicated Raspberry Pi 3. It runs CentOS 7 and has all the tool chains for ESP8266 and ESP3...
by MostlyHarmless
Wed Jan 08, 2020 10:41 pm
Forum: General Discussion and Questions
Topic: search for an inexpensive device to detect housebreaking
Replies: 19
Views: 3099

Re: search for an inexpensive device to detect housebreaking

pythoncoder wrote:
Wed Jan 08, 2020 7:24 am
no encryption that cannot be deciphered
Apart from a one-time pad.
Well, in that case we go with lead-pipe decoding. You get someone who knows the cipher, drug them and pummel them with a lead pipe until they tell you the secret. Its ugly, but it works.
by MostlyHarmless
Wed Jan 08, 2020 7:16 pm
Forum: ESP32 boards
Topic: asynycio as_GPS
Replies: 56
Views: 8220

Re: asynycio as_GPS

PS Jetzt könnt Ihr sogar genau sehen, wo ich wohne... :roll: Wo in D-Land? Bis 2001 war ich 'n Hamburger Fishkopp. So much for that, now about your resource problems. The best way to gain RAM is to freeze the code. I still have to adopt the v1.12 method of providing a proper build manifest. Still t...
by MostlyHarmless
Wed Jan 08, 2020 3:04 am
Forum: General Discussion and Questions
Topic: search for an inexpensive device to detect housebreaking
Replies: 19
Views: 3099

Re: search for an inexpensive device to detect housebreaking

If you want to have better security ... Security has been, and always will be, about creating an imbalance between the possible gain and the effort plus risk involved to get something. There is no unbreakable lock and there is no encryption that cannot be deciphered. It is just a matter of how much...
by MostlyHarmless
Tue Jan 07, 2020 7:37 pm
Forum: General Discussion and Questions
Topic: search for an inexpensive device to detect housebreaking
Replies: 19
Views: 3099

Re: search for an inexpensive device to detect housebreaking

I'm pretty sure that the window break detectors were a purely mechanical device. Normal alarm system practice is to use a normally closed contact. ...I think a vibration sensor should not have more demand for power, so an 8266 deep sleep design should be possible... Alas I have no experience with E...