Hollow Clock 4 remix (wifi internet time sync + new boxes and face)

FOREWORD

This is a light remix of the Hollow Clock 4 by Shiura

Before all, many thanks to him for this amazing design

Main modifications are:

+ use a M5STAMP C3 or a C3 Mini/Plus for controlling the stepper

as a consequence, the box has been modified to integrate it

+ time synchronisation through WIFI

parameterization and tuning through Web pages

+ (optional) remote logging using telnet

DESCRIPTION

Modified or new parts are prefixed HC4-

Parts with ARB indication needs arborescent support, SUP means any type of support (and no indication means no support)

HC4-box-m5c3: remix of the box for the M5Stamp C3 mini, with feets

HC4-box-m5c3-no-feet: remix of the box for the M5Stamp C3, without feets

HC4-box-m5c3-rounded: remix of the box for the M5Stamp C3, in the style of Hollow-Clock-5

HC4-box-c3: remix of the box for the C3 mini, in the style of Hollow-Clock-5

HC4-box-c3-ant: same with a hole for the C3 plus antenna

c3mini-slot-blocker blocker part for C3 mini

c3plus-slot-blocker blocker part for C3 plus

HC4-box-cap: cap to feet these boxes; it also adds a part for blocking the axes

HC4-motor-blocker: piece to block the motor (may need to tune the thickness according to your brand of stepper)

HC4-hour-hand-2.5mm-shorter: a mid-sized hour hand

HC4-hour-cap: filler for the magnet hole

HC4-pin: pin for the upper fixation of the cover (improve look)

HC4-cover-cust: rotor cover with added markers (5 min spacing) - downside: needs to be printed with support (arborescent for easy removal of the support ... and using less material)

The idea is to print the markers in a different colour using the "Filament change" script (with 0.2mm layers, the color change is done at layer 93)

You may also use the standard rotor-cover.stl if not interested by this version

Other parts come from the original model

Since the space in the box is limited, cabling between the C3 and the stepper controller card is soldered

As an option, an RTC clock may be implemented. This RTC module is not really useful when clock is connected to Internet (just speed up the init process). But it is of great use when the clock operates in standalone mode (without internet access), because clock starts ticking immediately instead of waiting the time synchronization by the user through the Web pages

Mounting the RTC module implies removing the black connector in order to weld the cables directly on the board

The RTC feet in a dedicated hole in the HC4 box

This RTC module has been bought on Ali (search for "rtc ds3231")

The Annex.zip archive provides guidance concerning cabling (for C3 mini/plus and for M5stamp C3) and building the software

CONFIGURING AND GENERATING THE SOFTWARE

A new version of the sketch is provided by the HC4.zip archive

(For historical purpose, the previous sketch and remix details is provided in Previous.zip)

This software is quite complex (applies to several LED / motor clocks, and adds a lot of functions)

Instructions for configuring and generating the software are given at the end of HC4-clock-howto.pdf

This document also describes the use of the Web interface