NTP Sync Device
Issue 2 (01 June 2022)
www.pvelectronics.co.uk
- 2 -
REVISION HISTORY
Issue
Number
Date
Reason for Issue
2
01 June 2022
Updated Version using ESP-01S
1
20 January 2017
New document
Standard Features:
Compatibility:
All our kits with GPS input from 3.5mm Jack
Socket
Status Indicator LEDs:
WiFi, NTP and Data Transmission
Main power input:
~5V DC direct from clock PCB
Baud rate:
9,600 bps
Data Format
: $GPRMC GPS Sentence.
Cable length:
15cm / 6" (included)
For use indoors only
Introduction:
The WiFi NTP Sync Device provides a convenient and low cost method to
synchronise time and date on our compatible Nixie Clocks.
Summary of Operation
On a factory power up, the device sets up in Access Point (AP) Mode.
This is a wireless network that you can connect to with your computer or
Smartphone. Once connected, you use your Smartphone to enter some
simple configuration settings and then re-boot the module. The module
then powers up in active mode, which will connect to your home WiFi
network and retrieve the time and date from an NTP server of your
choice. Time and date are sent to the clock as a 'fake' GPS Data
Sentence.
When data is sent to the clock, you will see a brief flash on the blue LED
on top of the ESP module. At startup, the module will send 5 pulses of
data, one pulse every 15 seconds. After stabilising, the module will then
not over-burden the NTP server, by sending data only every
approximately 55 minutes.
If you change the clock’s UTC offset parameters, this could take up to 55
minutes to take effect, so it might be quicker to briefly power the clock
off then on again, but ideally you should set the UTC offset before
configuring the WiFi Device.
