wordclock: finish implementing mqtt dimming support

wordclock: rename secrets to local_secrets to prevent colliding with the stdlib
wordclock: move lib/ files to root on the device and improve stamping
2024-03-03 11:18:14 +01:00 · 2024-03-03 10:29:54 +01:00 · 2024-03-03 10:29:13 +01:00 · 2024-03-01 17:13:18 +01:00 · 2024-02-29 21:39:00 +01:00 · 2024-02-27 08:06:31 +01:00
36 changed files with 2873 additions and 383 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,2 @@
+*.stamp
+local_secrets.py
--- a/.gitmodules
+++ b/.gitmodules
@ -0,0 +1,3 @@
+[submodule "third_party/micropython"]
+	path = third_party/micropython
+	url = https://github.com/micropython/micropython.git
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@ -0,0 +1,28 @@
+# How to Contribute
+
+We'd love to accept your patches and contributions to this project. There are
+just a few small guidelines you need to follow.
+
+## Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement. You (or your employer) retain the copyright to your contribution,
+this simply gives us permission to use and redistribute your contributions as
+part of the project. Head over to <https://cla.developers.google.com/> to see
+your current agreements on file or to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+## Code reviews
+
+All submissions, including submissions by project members, require review. We
+use GitHub pull requests for this purpose. Consult
+[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
+information on using pull requests.
+
+## Community Guidelines
+
+This project follows [Google's Open Source Community
+Guidelines](https://opensource.google.com/conduct/).
--- a/202
+++ b/202
@ -0,0 +1,202 @@
+
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+   limitations under the License.
--- a/README.md
+++ b/README.md
@ -0,0 +1,71 @@
+# wordclock - a word clock
+
+mlhx@google.com / michaelh@juju.nz
+
+wordclock is a clock that shows the current time as words such as
+"five past eight" or "quarter to three".  The clock is approximately
+400 mm x 400 mm square and uses RGB LEDs to light up the words.  The
+LEDs are driven by a ESP8266 and the time and time zone is
+asutomatically fetched from the Internet.
+
+## Mechanics
+
+See 
+The hardware is made up of four layers of 4 mm laser cut plywood.  The
+default design cuts this from 8 A3 sheets which are then overlapped,
+although it should be easy to modify if your laser cutter has a 400 x
+400 mm work area.
+
+The layers are:
+
+- A backing layer
+- The LED layer which has a snake pattern for laying the LEDs in
+- The mask layer, which has a cut out for each LED
+- The word layer
+
+Normal laser printer paper is sandwiched between the mask and word
+layers as a diffuser.
+
+The layers are held together using 8x M4 bolts.
+
+## Electronics
+
+The electronics consists of a 5 m strip of WS2812B LEDs driven by an
+ESP8266.  A 5 V 3 A supply feeds the ESP8266 and a 1N5401 between the
+5 V supply and the LEDs drops the supply enough so the 3.3 V output
+from the ESP8266 can reliably drive the LEDs.
+
+The LEDs are the 30 LED/m model arranged in a 11 wide by 10 high
+grid.  The LEDs snake through the hardware with the first LED being in
+the bottom right.
+
+## Firmware
+
+The firmware uses CircuitPython 3.0, periodically reads the local time
+from a custom time server, and fades from one set of words to the next
+when the words change.
+
+## Services
+
+A small API returns the local time of the caller by looking up the
+timezone based on the IPv4 address.
+
+## License
+
+Copyright 2019 Google LLC
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+https://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+## Disclaimer
+
+This is not an official Google product.
--- a/gen.py
+++ b/gen.py
@ -1,3 +1,17 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Generate the word to offset mapping for the clock."""
 import pprint
 import itertools

--- a/hw/asynced.py
+++ b/hw/asynced.py
@ -1,23 +0,0 @@
-import utime
-
-
-def delay(secs: float) -> generator:
-    end = utime.ticks_add(utime.ticks_ms(), int(secs * 1000))
-    while utime.ticks_diff(end, utime.ticks_ms()) >= 0:
-        yield None
-
-
-def fps(dt: float):
-    dt = int(dt * 1000)
-    until = utime.ticks_add(utime.ticks_ms(), dt)
-    while True:
-        d = utime.ticks_diff(until, utime.ticks_ms())
-        until = utime.ticks_add(until, dt)
-        if d > 0:
-            utime.sleep_ms(d)
-        yield None
-
-
-def test():
-    for f in delay(2.0):
-        print(utime.ticks_ms())
--- a/hw/clock.py
+++ b/hw/clock.py
@ -1,237 +0,0 @@
-#import time
-#import urequest as request
-import urllib.urequest
-import ujson
-import utime
-
-import asynced
-import iptime
-
-RANGES = {
-    'w': 94,
-    'seven': 88,
-    'we': 94,
-    'cl': 102,
-    'le': 80,
-    't': 109,
-    'qua': 17,
-    'd': 12,
-    'ne': 63,
-    'q': 19,
-    'ex': 31,
-    'ar': 16,
-    'hal': 41,
-    'ac': 20,
-    'y': 27,
-    'k': 99,
-    'twelve': 93,
-    'ha': 42,
-    'es': 62,
-    'lock': 99,
-    'pa': 44,
-    'h': 84,
-    'quarter': 13,
-    'aster': 45,
-    'eleven': 77,
-    'ns': 106,
-    'se': 105,
-    'five': 70,
-    'pas': 44,
-    'clock': 99,
-    'p': 44,
-    'lo': 101,
-    'went': 23,
-    'nes': 62,
-    'paste': 44,
-    'ur': 68,
-    'rte': 14,
-    'e': 105,
-    'six': 60,
-    'st': 46,
-    'amp': 7,
-    'three': 55,
-    'tense': 105,
-    'our': 67,
-    'x': 60,
-    'ten': 107,
-    'sixth': 58,
-    'quart': 15,
-    'eight': 83,
-    'n': 107,
-    'v': 97,
-    'tens': 106,
-    'l': 102,
-    'to': 33,
-    's': 106,
-    'nine': 51,
-    'four': 66,
-    'rd': 12,
-    'twentyfive': 22,
-    'art': 15,
-    'wen': 23,
-    'vent': 90,
-    'as': 45,
-    'er': 48,
-    'am': 7,
-    'its': 0,
-    'halfs': 39,
-    'oclock': 99,
-    'vet': 72,
-    'two': 74,
-    'eve': 89,
-    'ty': 26,
-    're': 56,
-    'pm': 9,
-    'o': 101,
-    'si': 61,
-    'fs': 39,
-    'run': 49,
-    'it': 0,
-    'even': 89,
-    'past': 44,
-    'f': 70,
-    'm': 10,
-    'r': 69,
-    'event': 89,
-    'a': 45,
-    'g': 85,
-    'ru': 49,
-    'c': 100,
-    'twenty': 22,
-    'vex': 30,
-    'half': 40,
-    'sis': 2,
-    'th': 58,
-    'is': 3,
-    'al': 41,
-    'in': 52,
-    'one': 63,
-    'i': 86,
-    'on': 64,
-    'ni': 51,
-    'ive': 71,
-    'u': 68,
-    'ones': 62,
-    'sam': 6,
-    'ts': 1
-}
-
-MINUTES = ('oclock', 'five past', 'ten past', 'quarter past', 'twenty past',
-           'twentyfive past', 'half past', 'twentyfive to', 'twenty to',
-           'quarter to', 'ten to', 'five to')
-
-HOURS = ('twelve', 'one', 'two', 'three', 'four', 'five', 'six', 'seven',
-         'eight', 'nine', 'ten', 'eleven')
-
-AMPM = ('am', 'pm')
-
-
-def split(secs: int) -> tuple:
-    mins = (secs // 60) % 60
-    minute = mins // 5
-    hour = (secs // 3600) % 24
-    if mins >= 35:
-        hour += 1
-    ampm = (hour // 12) % len(AMPM)
-    hour %= len(HOURS)
-    return MINUTES[minute], HOURS[hour], AMPM[ampm]
-
-
-class Frame:
-    Max = 255
-
-    def __init__(self, n: int=11 * 10, pixels: list=None):
-        if pixels is None:
-            pixels = [0] * n
-        self.pixels = pixels
-
-    def set(self, idx: int) -> Frame:
-        self.pixels[idx] = self.Max
-        return self
-
-    def __add__(self, other):
-        return Frame(pixels=[
-            min(self.Max, x + y) for x, y in zip(self.pixels, other.pixels)
-        ])
-
-    def muldiv(self, num: int, den: int):
-        return Frame(pixels=[x * num // den for x in self.pixels])
-
-
-def render(words: list) -> Frame:
-    f = Frame()
-    for word in words:
-        for w in word.split():
-            idx = RANGES[w]
-            for i in range(len(w)):
-                f.set(idx + i)
-    return f
-
-
-def show(f: Frame):
-    print('\033\143')
-    stride = 11
-    dots = ' .:~*#@'
-    for y in range(len(f.pixels) // stride):
-        s = f.pixels[y * stride:(y + 1) * stride]
-        if y & 1 != 0:
-            s.reverse()
-        d = [dots[x * len(dots) // (Frame.Max + 1)] for x in s]
-        print(''.join(d))
-    print()
-
-
-def sleep(secs: float):
-    utime.sleep_ms(int(secs * 1000))
-
-
-DT = 0.1
-
-
-def scan() -> generator:
-    f = Frame()
-    while True:
-        for i in range(len(f.pixels)):
-            yield f.set(i)
-            f = f.muldiv(80, 100)
-
-
-def run():
-    words = None
-    steps = int(2.0 / DT)
-    secs = iptime.day_sec()
-
-    # Flash until time is synced.
-    sc = scan()
-    fp = asynced.fps(0.2)
-    for s, meta in secs:
-        print(s, meta)
-        if s is not None and meta is not None:
-            break
-        yield next(sc)
-        next(fp)
-
-    src = Frame()
-    while True:
-        yield src
-        s, m2 = next(secs)
-        nxt = split(s)
-        print(nxt)
-        if nxt == words:
-            sleep(1)
-            continue
-        dest = render(nxt)
-        f = asynced.fps(DT)
-        for i in range(steps):
-            yield src.muldiv(steps - i, steps) + dest.muldiv(i, steps)
-            next(f)
-        words = nxt
-        src = dest
-
-
-def main2():
-    for f in run():
-        show(f)
-
-
-main2()
--- a/hw/iptime.py
+++ b/hw/iptime.py
@ -1,73 +0,0 @@
-import random
-
-import ujson
-import utime
-import urllib.urequest
-
-import asynced
-
-
-def _fetch():
-    try:
-        resp = urllib.urequest.urlopen(
-            'http://127.0.0.1:5000/iptime?ip=1.2.3.4')
-        t = ujson.load(resp)
-        resp.close()
-        return t
-    except OSError as ex:
-        return None
-
-
-def _jitter(mid):
-    return random.randint(mid, mid * 120 / 100)
-
-
-def _sync() -> generator:
-    while True:
-        # Poll quickly until the first result comes in.
-        while True:
-            got = _fetch()
-            if got is not None:
-                yield got
-                break
-            yield from asynced.delay(_jitter(15))
-
-        # Poll slowly until the connection drops.
-        while True:
-            yield from asynced.delay(_jitter(5))  #60 * 60))
-            got = _fetch()
-            if got is None:
-                break
-            yield got
-
-
-def day_sec() -> generator:
-    s = _sync()
-    # Spin until the first result comes in.
-    for got in s:
-        if got is None:
-            yield None, None
-            continue
-        base_ms = utime.ticks_ms()
-        base = got.get('day_sec', None)
-        if base is not None:
-            break
-    good = got
-
-    for got in s:
-        now = base + utime.ticks_diff(utime.ticks_ms(), base_ms) // 1000
-        yield now % (60 * 60 * 24), good
-
-        if got is not None:
-            # Update the baseline.
-            b2 = got.get('day_sec', None)
-            if b2 is not None:
-                base_ms = utime.ticks_ms()
-                base = b2
-                good = got
-
-
-def test():
-    for secs, meta in day_sec():
-        print(secs)
-        utime.sleep_ms(300)
--- a/hw/layers/back_bottom.svg
+++ b/hw/layers/back_bottom.svg
@ -0,0 +1,16 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg width="410mm" height="239mm" viewBox="0 0 410 239" xmlns="http://www.w3.org/2000/svg" version="1.1">
+<title>OpenSCAD Model</title>
+<path d="
+M 410,-0 L 0,-0 L 0,239 L 410,239 z
+M 6.38196,101.902 L 5.38196,101.176 L 5,100 L 5.38196,98.8244 L 6.38196,98.0979 L 7.61803,98.0979
+ L 8.61803,98.8244 L 9,100 L 8.61803,101.176 L 7.61803,101.902 z
+M 402.382,101.902 L 401.382,101.176 L 401,100 L 401.382,98.8244 L 402.382,98.0979 L 403.618,98.0979
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+" stroke="black" fill="lightgray" stroke-width="0.5"/>
+</svg>
--- a/hw/wordclock.scad
+++ b/hw/wordclock.scad
@ -0,0 +1,277 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/* ITLISASAMPM */
+/* ACQUARTERDC */
+/* TWENTYFIVEX */
+/* FALFSTENFTO */
+/* PASTERUNINE */
+/* ONESIXTHREE */
+/* FOURFIVETWO */
+/* EIGHTELEVEN */
+/* SEVENTWELVE */
+/* TENSEOCLOCK */
+
+a3 = [297, 420];
+e = 0.2;
+
+// Overall is [335, 330] on [450, 450] with 58 mm margins.
+s = [410, 410, 4];
+
+module rcube(s, r=5) {
+	hull() {
+		for (x = [r, s[0]-r]) {
+			for (y = [r, s[1] - r]) {
+				translate([x, y, 0])
+					cylinder(r=r, s[2]);
+			}
+		}
+	}
+}
+
+// Size of one LED on a strip.
+sled = [100/3, 10+1, 3];
+
+module led_strip(n) {
+	dc = 28+2.5;
+	w = 10;
+	h = 3;
+	lh = 2;
+	d = 5;
+
+	cube([n*dc, w, h-lh]);
+	for (x = [0..dc*n]) {
+		translate([x, 0, 0])
+		difference() {
+			cube([d, d, h-lh]);
+			translate([d/2, d/2, h-1])
+				cylinder(d=(d-1), 1);
+		}
+	}
+}
+
+// Width and height in characters
+cx = 11;
+cy = 10;
+// Separation between LEDs
+dx = sled[0];
+dy = 35;
+t = 4;
+sleds = [dx*cx, dy*cy, t];
+
+module layer_plate() {
+	square([s[0], s[1]], center=false);
+}
+
+module mholes() {
+	inset = 7;
+	m = 4;
+	d = s[0] - inset*2;
+	for (x = [inset, s[0]-inset]) {
+		for (y = [inset:d/3:inset+d]) {
+			translate([x, y, 0])
+				circle(d=m, $fn=10);
+		}
+	}
+}
+
+module back_layer() {
+	difference() {
+		layer_plate();
+		mholes();
+	}
+}
+
+module led_layer() {
+	module cutout() {
+		// Done as a snake
+		// LED strips
+		for (y = [0:dy:dy*cy-1]) {
+			translate([sled[1]/2, y, 0])
+#				square([sled[0]*cx+sled[1], sled[1]]);
+		}
+		// Verticals
+		for (y = [0:dy*2:dy*cy-1]) {
+			translate([3, y, 0])
+				square([sled[1]-1, dy+sled[1]]);
+		}
+		for (y = [dy:dy*2:dy*(cy-1)-1]) {
+			translate([sled[0]*cx+sled[1]-3, y+cy-sled[1]+1, 0])
+				square([sled[1], dy+sled[1]]);
+		}
+	}
+	sc = [dx*cx+sled[1]*2, dy*(cy-1)+sled[1], 4];
+	difference() {
+		layer_plate();
+		translate((s-sc)/2)
+			cutout();
+		nodemcu();
+		mholes();
+	}
+}
+
+module holes_layer() {
+	// LED hole radius
+	lhr = 6;
+	module holes() {
+		for (y = [0:dy:dy*cy-1]) {
+			for (x = [0:dx:dx*cx-1]) {
+				translate([x+lhr, y+lhr, 0])
+					circle(r=lhr);
+			}
+		}
+	}
+	sh = [dx*(cx-1)+lhr*2, dy*(cy-1)+lhr*2, t];
+	difference() {
+		layer_plate();
+		translate((s-sh)/2)
+			holes();
+		nodemcu();
+		mholes();
+	}
+}
+
+module diffuse_layer() {
+	// LED hole radius
+	lhr = dx-6;
+	module holes() {
+		for (y = [0:dy:dy*cy-1]) {
+			for (x = [0:dx:dx*cx-1]) {
+				translate([x+lhr/2, y+lhr/2, 0])
+					square([lhr, lhr]);
+			}
+		}
+	}
+	sh = [dx*(cx-1)+lhr*2, dy*(cy-1)+lhr*2, t];
+	difference() {
+		layer_plate();
+		translate((s-sh)/2)
+			holes();
+		mholes();
+	}
+}
+
+// Diffuser sheet.
+sd = [340, 340, 5];
+
+module diffuser_layer() {
+	difference() {
+		layer_plate();
+		translate((s - sd)/2+[0, 0, -e])
+			cube(sd);
+		mholes();
+	}
+}
+
+// Front words panel
+
+module words_layer() {
+	module character(ch) {
+		if (len(search(str(ch), "APQRDO")) > 0) {
+			difference() {
+				text(text=ch, size=dy*.7, font="Bitstream Vera Sans Mono:style=Bold", halign="center");
+				translate([-.8-.3, -6, 0])
+					square([3, 30]);
+			}
+		} else {
+			text(text=ch, size=dy*.7, font="Bitstream Vera Sans Mono:style=Bold", halign="center");
+		}
+	}
+	module row(v) {
+		for (i = [0:len(v)-1]) {
+			translate([sled[0]*i, 0, 0])
+				character(v[i]);
+		}
+	}
+	module rows() {
+		texts = [
+			"ITSISASAMPM",
+			"ACQUARTERDC",
+			"TWENTYFIVEX",
+			"HALFSTENFTO",
+			"PASTERUNINE",
+			"ONESIXTHREE",
+			"FOURFIVETWO",
+			"EIGHTELEVEN",
+			"SEVENTWELVE",
+			"TENSOKYDUDE",
+			];
+		for (i = [0:len(texts)-1]) {
+			translate([0, dy*i, 0])
+				row(texts[len(texts)-i-1]);
+		}
+	}
+	difference() {
+		layer_plate();
+		translate((s-sleds+[dx, dy, 0])/2 + [0, -11, 0])
+			rows();
+		mholes();
+	}
+}
+
+module nodemcu(h=t*2) {
+	sn = [26, 48+8, h];
+	susb = [10, 20, h];
+	translate([s[0]-susb[0]*2, 10, 0])
+	rotate(90, [0, 0, 1]) {
+		translate([(sn[0]-susb[0])/2, -susb[1], 0])
+			square([susb[0], susb[1]], center=false);
+		square([sn[0], sn[1]], center=false);
+			}
+}
+
+module clock() {
+	back_layer();
+	translate([0, 0, t*1])
+		led_layer();
+	translate([0, 0, t*2])
+		holes_layer();
+	translate([0, 0, t*3])
+		diffuser_layer();
+	translate([0, 0, t*4])
+		words_layer();
+}
+
+
+module sliced(c, o) {
+	h = 600;
+	difference() {
+		translate([0, -c, 0])
+			children();
+		translate([-10, o*h, 0])
+			square(h);
+	}
+}
+
+module slice_bottom() {
+	sliced(cut, 0) children();
+}
+
+module slice_top() {
+	sliced(cut, -1) children();
+}
+
+// cut is how far up to cut the layer into two parts.
+cut = 410-(410-297+58);
+
+// The following is a bit messy.  For each layer you should do a
+// slice_top() layer(); export to svg; then do a slice_bottom()
+// layer(); then export to svg.
+
+//slice_top()
+slice_bottom()
+words_layer();
+//diffuse_layer();
+//holes_layer();
+//led_layer()
--- a/iptime/init.py
+++ b/iptime/init.py
--- a/iptime/iptime.py
+++ b/iptime/iptime.py
@ -0,0 +1,75 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import datetime
+import functools
+import time
+
+from geoip import geolite2
+import astral
+import astral.sun
+import dateutil.tz
+import flask
+import requests
+import prometheus_flask_exporter  # type: ignore
+
+app = flask.Flask(__name__)
+_ = prometheus_flask_exporter.PrometheusMetrics(app)
+
+
+def _to_sec(dt):
+    return dt.hour * 60 * 60 + dt.minute * 60 + dt.second
+
+
+@functools.lru_cache(maxsize=5)
+def _external_ip():
+    r = requests.get('https://api.ipify.org?format=json')
+    return r.json().get('ip')
+
+
+@app.route('/now')
+def now():
+    ip = flask.request.args.get('ip')
+    if not ip:
+        ip = flask.request.remote_addr
+        if ip.startswith('192.168.') or ip.startswith('10.') or ip.startswith(
+                '127.0.'):
+            ip = _external_ip()
+    loc = geolite2.lookup(ip)
+    if loc is None:
+        flask.abort(
+            400,
+            'LOOKUP_FAILURE: unable to resolve the location of IP address %r' %
+            ip)
+    tz = dateutil.tz.gettz(loc.timezone)
+    epoch = time.time()
+    now = datetime.datetime.now(tz)
+    city = astral.LocationInfo((loc.ip, loc.country, loc.location[0],
+                                loc.location[1], loc.timezone, 0))
+    sun = astral.sun.sun(city.observer, date=now)
+    dawn = sun['dawn']
+    dusk = sun['dusk']
+
+    resp = dict(ip=loc.ip,
+                country=loc.country,
+                latitude=loc.location[0],
+                longitude=loc.location[1],
+                timezone=loc.timezone,
+                dawn=dawn,
+                dawn_sec=_to_sec(dawn),
+                dusk=dusk,
+                dusk_sec=_to_sec(dusk),
+                local_time=now,
+                day_sec=_to_sec(now),
+                posix_sec=int(epoch))
+    return flask.jsonify(resp)
--- a/iptime/iptime.service
+++ b/iptime/iptime.service
@ -0,0 +1,15 @@
+[Unit]
+Description=iptime
+After=network.target
+
+[Service]
+Type=simple
+User=juju
+Group=juju
+WorkingDirectory=/home/juju/lib/wordclock/srv
+ExecStart=/usr/bin/uwsgi --umask 0000 -s /tmp/iptime.sock --manage-script-name --plugin python3 --mount /api/iptime=iptime:app
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target
+
--- a/iptime/requirements.txt
+++ b/iptime/requirements.txt
--- a/iptime/test_iptime.py
+++ b/iptime/test_iptime.py
@ -0,0 +1,18 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import iptime.iptime
+
+
+def test_parse():
+    _ = iptime.iptime
--- a/setup.py
+++ b/setup.py
@ -0,0 +1,34 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from setuptools import setup, find_packages
+
+setup(
+    name='iptime',
+    version_format='{tag}.dev{commitcount}+{gitsha}',
+    setup_requires=['setuptools-git-version'],
+    url='https://juju.nz/src/michaelh/wordclock',
+    author='Michael Hope',
+    author_email='michaelh@juju.nz',
+    description='Word clock services',
+    packages=find_packages(),
+    install_requires=[
+        'Flask>=1.1.1',
+        'prometheus-flask-exporter>=0.12.1',
+        'astral>=1.7.1',
+        'python-dateutil>=2.7.5',
+        'python-geoip-geolite2-yplan',
+        'python-geoip-python3>=1.3',
+        'requests>=2.21',
+    ],
+)
--- a/src/Makefile
+++ b/src/Makefile
@ -0,0 +1,35 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+SRC = $(wildcard *.py) $(wildcard lib/*.py)
+
+MPY_CROSS = ../third_party/micropython/mpy-cross/build/mpy-cross
+
+put: $(SRC:%.py=build/put-%.stamp)
+	ampy -p /dev/ttyUSB? ls
+
+build/put-%.stamp: %.py
+	mkdir -p $(@D)
+	ampy -p /dev/ttyUSB? put $< $(<F)
+	touch -r $< $@
+
+build/%.mpy: %.py $(MPY_CROSS)
+	mkdir -p $(@D)
+	$(MPY_CROSS) -O1 -march=xtensa -o $@ $<
+
+$(MPY_CROSS):
+	$(MAKE) -C $(dir $(@D))
+
+clean:
+	rm -rf build
+
--- a/src/asynced.py
+++ b/src/asynced.py
@ -0,0 +1,50 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import time
+
+import compat
+
+from typing import Generator
+
+
+def delay(secs: float) -> Generator[None, None, None]:
+    end = compat.monotonic() + secs
+    while compat.monotonic() < end:
+        yield None
+
+
+def fps(fps: float) -> Generator[None, None, None]:
+    yield None
+    dt = 1 / fps
+    until = compat.monotonic() + dt
+    while True:
+        remain = until - compat.monotonic()
+        if remain > 0:
+            compat.sleep(remain)
+        until += dt
+        if remain < -dt:
+            # Catch up a bit
+            until += -remain / 3
+        yield None
+
+
+def wait(stop_ms: int) -> Generator[int, None, None]:
+    """Waits for stop_ms to pass, yielding how many ms have passed so far."""
+    start = compat.monotonic()
+    while True:
+        elapsed = int((compat.monotonic() - start) * 1000)
+        elapsed = min(stop_ms, elapsed)
+        yield elapsed
+        if elapsed >= stop_ms:
+            break
--- a/src/compat.py
+++ b/src/compat.py
@ -0,0 +1,29 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import random
+import time
+
+import utime
+
+
+def monotonic() -> float:
+    return utime.ticks_ms() * 1e-3
+
+
+def sleep(secs: float) -> None:
+    utime.sleep_ms(int(secs * 1e3))
+
+
+def randint(start: int, limit: int) -> int:
+    return start + random.getrandbits(30) % (limit - start + 1)
--- a/src/iptime.py
+++ b/src/iptime.py
@ -0,0 +1,102 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import random
+import time
+from typing import Generator, Optional
+
+import urequests
+
+import asynced
+import compat
+
+
+def _fetch() -> Optional[dict]:
+    try:
+        return urequests.get("http://worldtimeapi.org/api/ip").json()
+    except OSError as ex:
+        print("OSError", ex)
+        return None
+    except ValueError as ex:
+        print("ValueError", ex)
+        return None
+
+
+def _jitter(mid: int) -> int:
+    return compat.randint(mid, mid * 120 // 100)
+
+
+def _sync() -> Generator[Optional[dict], None, None]:
+    while True:
+        # Poll quickly until the first result comes in.
+        while True:
+            got = _fetch()
+            if got is not None:
+                yield got
+                break
+            yield from asynced.delay(_jitter(5))
+
+        # Poll slowly until the connection drops.
+        while True:
+            yield from asynced.delay(_jitter(60 * 60))
+            got = _fetch()
+            if got is None:
+                break
+            yield got
+
+
+def _get_day_sec(resp):
+    parts = resp.get("datetime", "").split("T")
+    if len(parts) != 2:
+        return None
+    hms = parts[1].split("+")[0].split(":")
+    if len(hms) != 3:
+        return None
+    return float(hms[0]) * 3600 + float(hms[1]) * 60 + float(hms[2])
+
+
+def day_sec() -> Generator[Optional[float], None, None]:
+    s = _sync()
+    # Spin until the first result comes in.
+    for got in s:
+        if got is None:
+            yield None
+            continue
+        local = compat.monotonic()
+        base = _get_day_sec(got)
+        if base is not None:
+            break
+    good = got
+
+    assert base is not None
+    for got in s:
+        now = base + compat.monotonic() - local
+        yield now % (60 * 60 * 24)
+
+        if got is not None:
+            # Update the baseline.
+            b2 = _get_day_sec(got)
+            if b2 is not None:
+                local = compat.monotonic()
+                base = b2
+                good = got
+
+
+def test():
+    for secs in day_sec():
+        print(secs)
+        compat.sleep(0.3)
+
+
+if __name__ == "__main__":
+    test()
--- a/src/lib/typing.py
+++ b/src/lib/typing.py
@ -0,0 +1,7 @@
+Generator = None
+
+Optional = None
+
+Tuple = None
+
+Iterable = None
--- a/src/main.py
+++ b/src/main.py
@ -0,0 +1,36 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import time
+
+import machine
+import network
+
+import compat
+import wordclock
+
+
+def main():
+    compat.sleep(1)
+    wordclock.main()
+
+
+if __name__ == "__main__":
+    try:
+        main()
+    except Exception as ex:
+        print(ex)
+    finally:
+        print("Resetting")
+        compat.sleep(10)
+        machine.reset()
--- a/src/mqtt.py
+++ b/src/mqtt.py
@ -0,0 +1,166 @@
+import socket
+
+import asynced
+
+from typing import Generator, Optional, Tuple
+
+_CONNECT = 1
+_CONNACK = 2
+_PUBLISH = 3
+_PUBACK = 4
+_PUBREC = 5
+_PUBREL = 6
+_PUBCOMP = 7
+_SUBSCRIBE = 8
+_SUBACK = 9
+_UNSUBSCRIBE = 10
+_UNSUBACK = 11
+_PINGREQ = 12
+_PINGRESP = 13
+_DISCONNECT = 14
+
+_DUP = 8
+_QOS = 2
+_RETAIN = 1
+
+_UPDATE_SECONDS = 120
+
+
+class Message:
+    def __init__(self, topic: str, value: str):
+        self.topic = topic
+        self.value = value
+
+    topic: str
+    value: str
+
+
+def _getch() -> Generator[None, Optional[int], int]:
+    """Returns the first non-None value sent to the generator"""
+    while True:
+        got = yield None
+        if got is not None:
+            return got
+
+
+def _get_packet() -> Generator[None, Optional[int], Tuple[int, bytearray]]:
+    """Decodes and returns the next packet"""
+    control = yield from _getch()
+    size = 0
+    shift = 0
+    while True:
+        got = yield from _getch()
+        size |= (got & 0x7F) << shift
+        shift += 7
+        if (got & 0x80) == 0:
+            break
+    payload = bytearray(size)
+    for i in range(len(payload)):
+        payload[i] = yield from _getch()
+    return control, payload
+
+
+def _encode_string(value: str) -> bytearray:
+    """Encodes a length-value string"""
+    encoded = value.encode()
+    return bytearray((len(encoded) >> 8, len(encoded) & 0xFF)) + encoded
+
+
+def _write_packet(
+    sock,
+    control: int,
+    payload: bytearray | bytes,
+    packet_id: Optional[int] = None,
+) -> None:
+    if packet_id is not None:
+        header = bytearray(
+            (control, len(payload) + 2, (packet_id >> 8) & 0xFF, packet_id & 0xFF)
+        )
+    else:
+        header = bytearray((control, len(payload)))
+    print("mqtt: >", header, payload)
+    sock.write(header + payload)
+
+
+def _send_connect(sock: socket.socket, username: str, password: str):
+    flags = 0x02
+    if username:
+        flags |= 0x80
+    if password:
+        flags |= 0x40
+    payload = (
+        _encode_string("MQTT")
+        + b"\x04"  # Protocol level
+        + bytearray((flags,))
+        + bytearray((0, _UPDATE_SECONDS * 2))  # Keep alive seconds
+        + _encode_string("")  # Client identifier
+    )
+    if username:
+        payload += _encode_string(username)
+    if password:
+        payload += _encode_string(password)
+    _write_packet(sock, _CONNECT << 4, payload)
+
+
+def _send_subscribe(sock: socket.socket, topic: str):
+    packet_id = hash(topic) & 0xFFFF
+    _write_packet(
+        sock,
+        (_SUBSCRIBE << 4) | 2,
+        _encode_string(topic) +
+        # QOS
+        b"\x00",
+        packet_id,
+    )
+
+
+def _send_publish(sock: socket.socket, topic: str, value: str):
+    _write_packet(sock, _PUBLISH << 4, _encode_string(topic) + value.encode())
+
+
+def _sender(sock: socket.socket, path: str) -> Generator[None, None, None]:
+    _send_subscribe(sock, path + "/#")
+
+    while True:
+        _send_publish(sock, path + "/available", "online")
+        yield from asynced.delay(_UPDATE_SECONDS)
+
+
+def _receiver() -> Generator[Optional[Message], Optional[int], None]:
+    while True:
+        control, payload = yield from _get_packet()
+        if (control >> 4) == _PUBLISH:
+            qos = (control // _QOS) & 3
+            topic_length = (payload[0] << 8) | payload[1]
+            topic = payload[2 : 2 + topic_length].decode()
+            has_packet_id = qos == 1 or qos == 2
+            packet_id_length = 2 if has_packet_id else 0
+            value = payload[2 + topic_length + packet_id_length :].decode()
+            print("mqtt: topic update:", topic, value)
+            yield Message(topic, value)
+
+
+def client(
+    sock: socket.socket,
+    path: str,
+    username: str = "",
+    password: str = "",
+) -> Generator[Optional[Message], Optional[int], None]:
+    _send_connect(sock, username, password)
+
+    connack, payload = yield from _get_packet()
+    if connack != _CONNACK << 4:
+        raise Exception("Expected CONNACK")
+
+    if len(payload) < 2:
+        raise Exception("CONNACK is too short")
+    if payload[1] != 0:
+        raise Exception("CONNACK has an error code")
+
+    receiver = _receiver()
+    sender = _sender(sock, path)
+
+    got = yield None
+    while True:
+        sender.send(None)
+        got = yield receiver.send(got)
--- a/src/wordclock.py
+++ b/src/wordclock.py
@ -0,0 +1,337 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import array
+import binascii
+import sys
+import socket
+
+import machine
+import neopixel
+import network
+import micropython
+
+import asynced
+import compat
+import iptime
+import mqtt
+import local_secrets
+
+from typing import Optional, Generator, Iterable, Tuple
+
+if "ESP32" in str(sys.implementation):
+    LED_BUILTIN = 2
+else:
+    LED_BUILTIN = 16
+
+# fmt: off
+RANGES = {
+    'dude': 0,
+    'ok': 5,
+    'ten': 8,
+    'seven': 11,
+    'twelve': 16,
+    'even': 22,
+    'eleven': 22,
+    'eight': 28,
+    'four': 33,
+    'five': 37,
+    'two': 41,
+    'three': 44,
+    'six': 49,
+    'one': 52,
+    'past': 55,
+    'run': 60,
+    'nine': 62,
+    'to': 66,
+    'TEN': 69,
+    'HALF': 73,
+    'TWENTY': 77,
+    'TWENTYFIVE': 77,
+    'FIVE': 83,
+    'QUARTER': 90,
+    'A': 98,
+    'AM': 106,
+    'PM': 108,
+    'is': 102,
+    'it': 99,
+    'its': 99,
+}
+
+CIEL8 = (0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 5, 5, 6, 6, 7, 8, 8, 9,
+         10, 11, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 25, 26, 28,
+         30, 31, 33, 35, 37, 39, 40, 42, 44, 46, 49, 51, 53, 55, 57, 60, 63,
+         66, 68, 71, 74, 77, 80, 83, 86, 90, 93, 96, 100, 103, 107, 111, 115,
+         118, 122, 127, 131, 136, 140, 144, 149, 153, 158, 163, 168, 173, 179,
+         184, 189, 195, 200, 206, 212, 218, 224, 230, 236, 242, 249, 255)
+
+MINUTES = ('oclock', 'FIVE past', 'TEN past', 'QUARTER past', 'TWENTY past',
+           'TWENTYFIVE past', 'HALF past', 'TWENTYFIVE to', 'TWENTY to',
+           'QUARTER to', 'TEN to', 'FIVE to')
+
+HOURS = ('twelve', 'one', 'two', 'three', 'four', 'five', 'six', 'seven',
+         'eight', 'nine', 'ten', 'eleven')
+
+AMPM = ('AM', 'PM')
+
+ITS = ('its', 'it is', 'its dude', 'it is dude', 'its ok', 'it is ok')
+
+COLOUR = (200, 255, 200)
+# fmt: on
+
+
+def _split(secs: int) -> Tuple[str, str, str]:
+    """Converts a seconds-of-day into minutes, hours, and AM/PM"""
+    secs = int(secs)
+    mins = (secs // 60) % 60
+    minute = mins // 5
+    hour = (secs // 3600) % 24
+    if mins >= 35:
+        hour += 1
+    ampm = (hour // 12) % len(AMPM)
+    hour %= len(HOURS)
+    return MINUTES[minute], HOURS[hour], AMPM[ampm]
+
+
+def to_rgb(i, colour) -> tuple:
+    return ((i * colour[0]) >> 8, (i * colour[1]) >> 8, (i * colour[2]) >> 8)
+
+
+class Frame:
+    Max = 255
+    Zeros = tuple([0] * (11 * 10))
+
+    def __init__(self, n: int = 11 * 10, pixels: Optional[array.array] = None):
+        self.pixels = pixels if pixels else list(self.Zeros)
+
+    def set(self, idx: int, value: int) -> "Frame":
+        self.pixels[idx] = value
+        return self
+
+    def __add__(self, other):
+        return Frame(
+            pixels=[min(self.Max, x + y) for x, y in zip(self.pixels, other.pixels)]
+        )
+
+    def muldiv(self, num: int, den: int):
+        return Frame(pixels=[x * num // den for x in self.pixels])
+
+
+@micropython.native
+def merge(f1: Frame, f2: Frame, num1: int, num2: int, den: int) -> Frame:
+    """Merges two frames together."""
+    m = Frame.Max
+    p1 = f1.pixels
+    p2 = f2.pixels
+    o = array.array("H", Frame.Zeros)
+    for i in range(len(p1)):
+        k = (p1[i] * num1 + p2[i] * num2) // den
+        if k >= m:
+            k = m
+        o[i] = k
+    return Frame(pixels=o)
+
+
+def _render(words: Iterable[str], brightness: int) -> Frame:
+    """Renders a list of words into a frame"""
+    f = Frame()
+    for word in words:
+        for w in word.split():
+            idx = RANGES.get(w, None)
+            if idx is not None:
+                for i in range(len(w)):
+                    f.set(idx + i, brightness)
+            else:
+                print("warning: %s is missing" % w)
+    return f
+
+
+def _prefix() -> Tuple[str]:
+    """Returns a random suffix word such as 'dude'"""
+    return (ITS[compat.randint(0, len(ITS) - 1)],)
+
+
+def _show(f: Frame, n):
+    """Renders a frame to a NeoPixel handler"""
+    p = f.pixels
+    buf = bytearray(len(p) * 3)
+    r, g, b = COLOUR
+    i = 0
+
+    for c in p:
+        n.buf[i + 1] = (r * c) >> 8
+        n.buf[i + 0] = (g * c) >> 8
+        n.buf[i + 2] = (b * c) >> 8
+        i += 3
+    n.write()
+
+
+def _scan() -> Generator[Frame, None, None]:
+    """Returns a stream of frames that scan across the LEDs"""
+    f = Frame()
+    while True:
+        for i in range(len(f.pixels)):
+            yield f.set(i, Frame.Max)
+            f = f.muldiv(80, 100)
+
+
+def _intensity(num: int, den: int) -> int:
+    idx = num * len(CIEL8) // den
+    if idx >= len(CIEL8):
+        return 255
+    return CIEL8[idx]
+
+
+def _crossfade(src: Frame, dest: Frame, fade_time: int):
+    for at in asynced.wait(fade_time):
+        yield merge(
+            src,
+            dest,
+            _intensity(fade_time - at, fade_time),
+            _intensity(at, fade_time),
+            Frame.Max,
+        )
+
+
+def _run(brightness_queue: list[int]) -> Generator[Optional[Frame], None, None]:
+    words = None
+    fade_time = 2000
+    secs = iptime.day_sec()
+    brightness = 255
+
+    # Flash until time is synced.
+    sc = _scan()
+    for s in secs:
+        if s is not None:
+            break
+        yield next(sc)
+
+    src = Frame()
+    while True:
+        changed = False
+        if brightness_queue:
+            brightness = brightness_queue[-1]
+            brightness_queue.clear()
+            changed = True
+
+        now = next(secs)
+        next_words = _split(now)
+        if words != next_words:
+            words = next_words
+            changed = True
+
+        if changed:
+            next_frame = _render(_prefix() + next_words, brightness)
+            yield from _crossfade(src, next_frame, fade_time)
+            src = next_frame
+        else:
+            yield from asynced.delay(2)
+
+
+def blink() -> Generator[None, None, None]:
+    led = machine.Pin(LED_BUILTIN, machine.Pin.OUT)
+    while True:
+        led.on()
+        yield from asynced.delay(0.03)
+        led.off()
+        yield from asynced.delay(2.9)
+
+
+def bench() -> Generator[None, None, None]:
+    yield None
+    i = 30
+    while True:
+        start = compat.monotonic()
+        for _ in range(i):
+            yield None
+        elapsed = compat.monotonic() - start
+        if elapsed > 0:
+            print("%d in %.3f %.3f/1 %.1f FPS" % (i, elapsed, elapsed / i, i / elapsed))
+
+
+def _connect(wlan: network.WLAN) -> Generator[None, None, None]:
+    yield None
+
+    while True:
+        if not wlan.isconnected():
+            wlan.active(True)
+            wlan.connect(local_secrets.WLAN_ESSID, local_secrets.WLAN_PASSWORD)
+        else:
+            # Override the DNS server as MicroPython and dnsmasq seem
+            # to be incompatible.
+            cfg = list(wlan.ifconfig())
+            wlan.ifconfig(cfg[:3] + ["8.8.8.8"])
+        yield from asynced.delay(10)
+
+
+def _mqtt_client(
+    is_connected, brightness_queue: list[int]
+) -> Generator[None, None, None]:
+    while True:
+        yield from asynced.delay(3)
+
+        if not is_connected():
+            continue
+
+        sock = socket.socket()
+        try:
+            target = socket.getaddrinfo(local_secrets.MQTT_HOST, 1883)[0][-1]
+            print("mqtt: connecting to", target)
+            sock.connect(target)
+            sock.setblocking(False)
+
+            topic = "light/wc-" + binascii.hexlify(machine.unique_id()).decode()
+            client = mqtt.client(
+                sock, topic, local_secrets.MQTT_USERNAME, local_secrets.MQTT_PASSWORD
+            )
+            while True:
+                got = sock.read()
+                if not got:
+                    client.send(None)
+                    yield None
+                    continue
+
+                for ch in got:
+                    message = client.send(ch)
+                    if not message:
+                        continue
+                    client.send(None)
+                    if message.topic.endswith("/brightness"):
+                        brightness_queue.append(int(message.value))
+        except Exception as ex:
+            print("mqtt: exception:", ex)
+        finally:
+            print("mqtt: close")
+            sock.close()
+
+
+def main():
+    num = 11 * 10
+    n = neopixel.NeoPixel(machine.Pin(2), num)
+    wlan = network.WLAN(network.STA_IF)
+    brightness_queue = []
+    routines = (
+        _connect(wlan),
+        _mqtt_client(wlan.isconnected, brightness_queue),
+        _run(brightness_queue),
+        blink(),
+        asynced.fps(30),
+        bench(),
+    )
+    while True:
+        for r in routines:
+            f = next(r)
+            if f is None:
+                continue
+            elif isinstance(f, Frame):
+                _show(f, n)
--- a/srv/iptime.py
+++ b/srv/iptime.py
@ -1,50 +0,0 @@
-import datetime
-import sys
-import time
-
-from geoip import geolite2
-import astral
-import dateutil.tz
-import flask
-
-app = flask.Flask(__name__)
-
-
-def to_sec(dt):
-    return dt.hour * 60 * 60 + dt.minute * 60 + dt.second
-
-
-@app.route('/iptime')
-def iptime():
-    ip = flask.request.args.get('ip')
-    if not ip:
-        ip = flask.request.remote_addr
-    loc = geolite2.lookup(ip)
-    if loc is None:
-        flask.abort(
-            400,
-            'LOOKUP_FAILURE: unable to resolve the location of IP address %r' %
-            ip)
-    tz = dateutil.tz.gettz(loc.timezone)
-    epoch = time.time()
-    now = datetime.datetime.now(tz)
-    l = astral.Location((loc.ip, loc.country, loc.location[0], loc.location[1],
-                         loc.timezone, 0))
-    s = l.sun()
-    dawn = s['dawn']
-    dusk = s['dusk']
-
-    resp = dict(
-        ip=loc.ip,
-        country=loc.country,
-        latitude=loc.location[0],
-        longitude=loc.location[1],
-        timezone=loc.timezone,
-        dawn=dawn,
-        dawn_sec=to_sec(dawn),
-        dusk=dusk,
-        dusk_sec=to_sec(dusk),
-        local_time=now,
-        day_sec=to_sec(now),
-        posix_sec=int(epoch))
-    return flask.jsonify(resp)
--- a/third_party/micropython
+++ b/third_party/micropython
@ -0,0 +1 @@
+Subproject commit 678707c8b07323c5b914778708a2858387c3b60c
Author	SHA1	Message	Date
Michael Hope	c7d0f0e03b	wordclock: finish implementing mqtt dimming support	2024-03-03 11:18:14 +01:00
Michael Hope	ac77aa9ed1	wordclock: rename secrets to local_secrets to prevent colliding with the stdlib	2024-03-03 10:29:54 +01:00
Michael Hope	c3ff8528bd	wordclock: move lib/ files to root on the device and improve stamping	2024-03-03 10:29:13 +01:00
Michael Hope	840728ed05	wordclock: add typing everywhere	2024-03-01 17:13:18 +01:00
Michael Hope	a0e254d964	wordclock: tidy up the Makefile and compile the modules	2024-02-29 21:39:00 +01:00
Michael Hope	d537de05fc	wordclock: drop the duplicate WLAN setup	2024-02-27 08:06:31 +01:00
Michael Hope	a8c6c04e11	wordclock: run black and isort	2024-02-27 08:05:22 +01:00
Michael Hope	e7d92b5013	wordclock: update to work with the latest MicroPython	2024-02-27 07:58:25 +01:00
Michael Hope	ffead18f6e	wordclock: add the copyrights everywhere	2020-12-01 21:15:19 +01:00
Michael Hope	af5e3d44b8	wordclock: various tidy ups Handle more errors so the clock doesn't stop. Reset if any other exception occurs. Handle an empty response from iptime. Blink less often. Dim the clock outside hours.	2020-11-29 20:51:54 +01:00
Michael Hope	a08ad836c2	iptime: update to match astral 2.2	2020-10-25 19:53:32 +00:00
Michael Hope	8573ab58c1	iptime: cache the external IP	2020-01-05 13:44:19 +01:00
Michael Hope	c2a63719a9	iptime: add Prometheus metrics	2020-01-02 15:40:29 +01:00
Michael Hope	1c86e5c746	iptime: also support requests from localhost.	2020-01-02 11:37:04 +01:00
Michael Hope	7750379117	iptime: add the missing requests dependency.	2020-01-02 11:34:25 +01:00
Michael Hope	52a984c726	iptime: fix the pyflake8 errors	2020-01-02 11:32:47 +01:00
Michael Hope	721c9fe70b	iptime: added a setup script and tests	2020-01-02 11:27:54 +01:00
Michael Hope	4a3cf46a58	Added a license and basic readme.	2019-03-10 20:35:33 +01:00
Michael Hope	34f63bac66	hw: imported the SCAD and rendered layers	2019-03-10 20:35:03 +01:00
Michael Hope	67dfd2e378	src: renamed hw to src	2018-12-29 16:55:08 +01:00
Michael Hope	86a5c4d90e	Added .gitignore	2018-12-29 16:54:53 +01:00
Michael Hope	a07a986168	worldclock: improve performance, add intensity scaling. Now does ~25 FPS when transitioning. Fades based on intensity instead of PWM level.	2018-12-29 16:28:55 +01:00
Michael Hope	018f224745	wordclock: created v1	2018-12-29 14:24:16 +01:00
Michael Hope	5fd0345df8	worldclock: add a blink and benchmark coroutine.	2018-12-10 16:34:22 +01:00
Michael Hope	fc66f73494	iptime: switch to the real retry time.	2018-12-10 16:33:52 +01:00
Michael Hope	67ecf3b1bf	asynced: allow fps() to ignore the first run and to catch up.	2018-12-10 16:33:33 +01:00
Michael Hope	f11308e4e8	wordclock: added a Makefile, main	2018-12-10 15:53:00 +01:00
Michael Hope	8174e85c90	wordclock: moved to circuitpython, fixed esp8266 bugs	2018-12-10 15:52:34 +01:00
Michael Hope	b82355d215	iptime: add a systemd file	2018-12-09 16:08:07 +01:00
Michael Hope	03fa7d15f7	iptime: lookup the external IP address if this comes from inside the network.	2018-12-09 16:07:46 +01:00
				`@ -0,0 +1 @@`
				`Subproject commit 678707c8b07323c5b914778708a2858387c3b60c`