ESP32と8x32LEDモジュールでNTP時計を作る（MicroPython）

大型NTP時計の初代がまた不調になったので、あきらめて新しく作ることにしました。

ESP32用のMicroPythonを使ったのが新しい点で、ntpの時刻でrtcをセットするのがとても簡単で感心しました。プログラムが書きやすいので、フォントデータの作り方をシンプルにできました。Apple2のフォントデータを使いました。

# wallClock4-240626.py Koji Ohashi 20240626
# Thanks to 
# https://www.microfan.jp/2023/10/esp32-net-micropython/

# VCC, GND, IO16

import network, ntptime, utime, time
import machine, neopixel
import random
from machine import RTC

ssid = '****************'
passwd = '*****************'
JST_OFFSET = 9 * 60 * 60 # 9時間（32400秒)

WIDTH = 32
HEIGHT = 8
LED_COUNT = 256
DAY_START = 7
DAY_END = 20
LED_BLACK = ( 0, 0, 0)
NIGHT_COLOR = ( 10, 5, 0)

font_pos = ( 0, 7, 13, 18, 25)
rtc_flag = True

rtc = RTC()
np = neopixel.NeoPixel(machine.Pin(16), LED_COUNT)

# Apple 2 font
# https://github.com/Michaelangel007/apple2_hgr_font_tutorial
NumFont0 = (
    ( 0x1C, 0x22, 0x32, 0x2A, 0x26, 0x22, 0x1C, 0x00), #0
    ( 0x08, 0x0C, 0x08, 0x08, 0x08, 0x08, 0x1C, 0x00), #1
    ( 0x1C, 0x22, 0x20, 0x18, 0x04, 0x02, 0x3E, 0x00), #2
    ( 0x3E, 0x20, 0x10, 0x18, 0x20, 0x22, 0x1C, 0x00), #3
    ( 0x10, 0x18, 0x14, 0x12, 0x3E, 0x10, 0x10, 0x00), #4
    ( 0x3E, 0x02, 0x1E, 0x20, 0x20, 0x22, 0x1C, 0x00), #5
    ( 0x38, 0x04, 0x02, 0x1E, 0x22, 0x22, 0x1C, 0x00), #6
    ( 0x3E, 0x20, 0x10, 0x08, 0x04, 0x04, 0x04, 0x00), #7
    ( 0x1C, 0x22, 0x22, 0x1C, 0x22, 0x22, 0x1C, 0x00), #8
    ( 0x1C, 0x22, 0x22, 0x3C, 0x20, 0x10, 0x0E, 0x00), #9
    ( 0x00, 0x00, 0x08, 0x00, 0x08, 0x00, 0x00, 0x00)) #:



#HSV形式からRGB形式に変換
#h = 0 ~ 360, s = 0 ~ 255, v = 0 ~ 255
#R=0 ~ 255, G=0 ~ 255, B=0 ~ 255,
def hsv_to_rgb(h,s,v):
    i = int(h / 60.0)
    mx = v
    mn = v - ((s / 255.0) * v)
    
    if h is None:
        return(0,0,0)
    
    if i == 0:
        (r1,g1,b1) = (mx,(h/60.0)*(mx-mn)+mn,mn)
    elif i == 1:
        (r1,g1,b1) = (((120.0-h)/60.0)*(mx-mn)+mn,mx,mn)
    elif i == 2:
        (r1,g1,b1) = (mn,mx,((h-120.0)/60.0)*(mx-mn)+mn)
    elif i == 3:
        (r1,g1,b1) = (mn,((240.0-h)/60.0)*(mx-mn)+mn,mx)
    elif i == 4:
        (r1,g1,b1) = (((h-240.0)/60.0)*(mx-mn)+mn,mn,mx)
    elif 5 <= i:
        (r1,g1,b1) = (mx,mn,((360.0-h)/60.0)*(mx-mn)+mn)

    return (int(r1), int(g1), int(b1))


def vibrant_color( hour, minute, column):
    h = (hour - DAY_START) * 30 + minute / 2 + column * 4
    h = h % 360
    return hsv_to_rgb(h,255,50)


def read_font(n):
    font_list = []
    for j in range(8):
        sub_list = []
        for i in range(7):
            sub_list.append(((NumFont0[n][j] >> (7 - i)) & 1))
        font_list.append(sub_list)
    return font_list

def wifi_connect(ssid, passwd): # アクセスポイントへの接続
    wifi = network.WLAN(network.STA_IF)
    wifi.active(True)
    if not wifi.isconnected():
        print('connecting to network...')
        wifi.connect(ssid, passwd)
        while not wifi.isconnected():
            print('.',end='')
            time.sleep_ms(500)
        print()
    return wifi

def set_rtc():
    ntptime.settime()
    ut = utime.localtime(utime.time() + JST_OFFSET)
    rtc.datetime((ut[0], ut[1], ut[2], ut[6]+1, ut[3], ut[4], ut[5], 0))

def pix_pos( x, y):
    if ( x % 2 == 0):
        pos = x * HEIGHT + y
    else:
        pos = x * HEIGHT + ( ( HEIGHT - 1) - y)
    return pos

def adjust_rtc( rtctime, flag ):
    if ((rtctime[5] == 0) and (flag == False)):
        set_rtc()
        flag = True
    if ((rtctime[5] != 0) and (flag == True)):
        flag = False
        return flag

def clear_led():
    for i in range( LED_COUNT):
        np[i] = LED_BLACK
    np.write()    






clear_led()
wifi = wifi_connect(ssid, passwd)

set_rtc()
time_now = rtc.datetime()
rtc_flag = False
while True:
    time_now = rtc.datetime()
    rtc_flag = adjust_rtc( time_now, rtc_flag )
    hour = time_now[4]
    minute = time_now[5]
    second = time_now[6]
    str_hour = f'{time_now[4]:02}'
    str_min = f'{time_now[5]:02}'
    time_list = ( int(str_hour[0]), int(str_hour[1]), 10, int(str_min[0]), int(str_min[1]))
    i = 0
    for n in time_list:
        for y in range( 8):
            for x in range( 7):
                column = font_pos[i] + x
                pos = pix_pos( column, y)
                if (read_font(n)[y][6-x] != 0):
                    if (DAY_START <= hour <= DAY_END):
                        if (second < 45):
                            np[pos] = vibrant_color( hour, minute, column)
                        else:
                            np[pos] = hsv_to_rgb(random.randint( 0, 360),255,50)
                    else:
                        np[pos] = NIGHT_COLOR
                else:
                    np[pos] = LED_BLACK
        i = i + 1
    np.write()
    time.sleep(0.1)

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# wallClock4-240626.py Koji Ohashi 20240626

# Thanks to

# https://www.microfan.jp/2023/10/esp32-net-micropython/

# VCC, GND, IO16

import network, ntptime, utime, time

import machine, neopixel

import random

from machine import RTC

ssid = '****************'

passwd = '*****************'

JST_OFFSET = 9 * 60 * 60 # 9時間（32400秒)

WIDTH = 32

HEIGHT = 8

LED_COUNT = 256

DAY_START = 7

DAY_END = 20

LED_BLACK = ( 0, 0, 0)

NIGHT_COLOR = ( 10, 5, 0)

font_pos = ( 0, 7, 13, 18, 25)

rtc_flag = True

rtc = RTC()

np = neopixel.NeoPixel(machine.Pin(16), LED_COUNT)

# Apple 2 font

# https://github.com/Michaelangel007/apple2_hgr_font_tutorial

NumFont0 = (

( 0x1C, 0x22, 0x32, 0x2A, 0x26, 0x22, 0x1C, 0x00), #0

( 0x08, 0x0C, 0x08, 0x08, 0x08, 0x08, 0x1C, 0x00), #1

( 0x1C, 0x22, 0x20, 0x18, 0x04, 0x02, 0x3E, 0x00), #2

( 0x3E, 0x20, 0x10, 0x18, 0x20, 0x22, 0x1C, 0x00), #3

( 0x10, 0x18, 0x14, 0x12, 0x3E, 0x10, 0x10, 0x00), #4

( 0x3E, 0x02, 0x1E, 0x20, 0x20, 0x22, 0x1C, 0x00), #5

( 0x38, 0x04, 0x02, 0x1E, 0x22, 0x22, 0x1C, 0x00), #6

( 0x3E, 0x20, 0x10, 0x08, 0x04, 0x04, 0x04, 0x00), #7

( 0x1C, 0x22, 0x22, 0x1C, 0x22, 0x22, 0x1C, 0x00), #8

( 0x1C, 0x22, 0x22, 0x3C, 0x20, 0x10, 0x0E, 0x00), #9

( 0x00, 0x00, 0x08, 0x00, 0x08, 0x00, 0x00, 0x00)) #:

#HSV形式からRGB形式に変換

#h = 0 ~ 360, s = 0 ~ 255, v = 0 ~ 255

#R=0 ~ 255, G=0 ~ 255, B=0 ~ 255,

def hsv_to_rgb(h,s,v):

i = int(h / 60.0)

mx = v

mn = v - ((s / 255.0) * v)

if h is None:

return(0,0,0)

if i == 0:

(r1,g1,b1) = (mx,(h/60.0)*(mx-mn)+mn,mn)

elif i == 1:

(r1,g1,b1) = (((120.0-h)/60.0)*(mx-mn)+mn,mx,mn)

elif i == 2:

(r1,g1,b1) = (mn,mx,((h-120.0)/60.0)*(mx-mn)+mn)

elif i == 3:

(r1,g1,b1) = (mn,((240.0-h)/60.0)*(mx-mn)+mn,mx)

elif i == 4:

(r1,g1,b1) = (((h-240.0)/60.0)*(mx-mn)+mn,mn,mx)

elif 5 <= i:

(r1,g1,b1) = (mx,mn,((360.0-h)/60.0)*(mx-mn)+mn)

return (int(r1), int(g1), int(b1))

def vibrant_color( hour, minute, column):

h = (hour - DAY_START) * 30 + minute / 2 + column * 4

h = h % 360

return hsv_to_rgb(h,255,50)

def read_font(n):

font_list = []

for j in range(8):

sub_list = []

for i in range(7):

sub_list.append(((NumFont0[n][j] >> (7 - i)) & 1))

font_list.append(sub_list)

return font_list

def wifi_connect(ssid, passwd): # アクセスポイントへの接続

wifi = network.WLAN(network.STA_IF)

wifi.active(True)

if not wifi.isconnected():

print('connecting to network...')

wifi.connect(ssid, passwd)

while not wifi.isconnected():

print('.',end='')

time.sleep_ms(500)

print()

return wifi

def set_rtc():

ntptime.settime()

ut = utime.localtime(utime.time() + JST_OFFSET)

rtc.datetime((ut[0], ut[1], ut[2], ut[6]+1, ut[3], ut[4], ut[5], 0))

def pix_pos( x, y):

if ( x % 2 == 0):

pos = x * HEIGHT + y

else:

pos = x * HEIGHT + ( ( HEIGHT - 1) - y)

return pos

def adjust_rtc( rtctime, flag ):

if ((rtctime[5] == 0) and (flag == False)):

set_rtc()

flag = True

if ((rtctime[5] != 0) and (flag == True)):

flag = False

return flag

def clear_led():

for i in range( LED_COUNT):

np[i] = LED_BLACK

np.write()

clear_led()

wifi = wifi_connect(ssid, passwd)

set_rtc()

time_now = rtc.datetime()

rtc_flag = False

while True:

time_now = rtc.datetime()

rtc_flag = adjust_rtc( time_now, rtc_flag )

hour = time_now[4]

minute = time_now[5]

second = time_now[6]

str_hour = f'{time_now[4]:02}'

str_min = f'{time_now[5]:02}'

time_list = ( int(str_hour[0]), int(str_hour[1]), 10, int(str_min[0]), int(str_min[1]))

i = 0

for n in time_list:

for y in range( 8):

for x in range( 7):

column = font_pos[i] + x

pos = pix_pos( column, y)

if (read_font(n)[y][6-x] != 0):

if (DAY_START <= hour <= DAY_END):

if (second < 45):

np[pos] = vibrant_color( hour, minute, column)

else:

np[pos] = hsv_to_rgb(random.randint( 0, 360),255,50)

else:

np[pos] = NIGHT_COLOR

else:

np[pos] = LED_BLACK

i = i + 1

np.write()

time.sleep(0.1)

7時から21時までは明るく表示します。0-45秒は時間ごとに変わるグラデーション表示で、45-0秒はドット毎にランダムな色で表示します。夜中はオレンジ色で暗く表示します。

今回購入したLEDマトリックスは1100円ぐらいでしたが、電源投入直後に全点灯する不具合がありました。しばらく様子見です。