That last program did display the correct local time, but it was hard to read.
In this version we will extract data time values, and then display
a formatted version of both the date and the time.
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50 | from machine import Pin, SPI
import ssd1306
from time import localtime
import config
SCL=Pin(config.SPI_SCL_PIN)
SDA=Pin(config.SPI_SDA_PIN)
DC = Pin(config.SPI_DC_PIN)
RES = Pin(config.SPI_RESET_PIN)
CS = Pin(config.SPI_CS_PIN)
SPI_BUS = config.SPI_BUS
WIDTH = config.DISPLAY_WIDTH
HEIGHT = config.DISPLAY_HEIGHT
spi=machine.SPI(SPI_BUS, sck=SCL, mosi=SDA, baudrate=1000000)
oled = ssd1306.SSD1306_SPI(WIDTH, HEIGHT, spi, DC, RES, CS)
while True:
year = localtime()[0]
month = localtime()[1]
day = localtime()[2]
hour = localtime()[3]
minute = localtime()[4]
second = localtime()[5]
# display in 12 hour time paying special attention with hour == 0 and hour == 12
if hour == 0:
# Midnight edge case
hour = 12
am_pm = 'AM'
elif hour == 12:
# Noon edge case
am_pm = 'PM'
elif hour > 12:
# Afternoon hours
hour -= 12
am_pm = 'PM'
else:
# Morning hours
am_pm = 'AM'
oled.fill(0)
# display the date on the first line
oled.text(str(month) + "/" + str(day) + "/" + str(year), 0, 0, 1)
# display the time in hours, minute and seconds on the second line
# note that the ":02" indicates printing in two columns with leading zeros
oled.text(f"{hour}:{minute:02}:{second:02} " + am_pm, 0, 10, 1)
oled.show()
|
When we print out minutes and seconds we want to make sure that we print them in two digits with a leading zero.
| f"{minute:02}:{second:02}"
|
The python modulo operator % is used to find the remainder of the hour after dividing by 12. This converts the 24-hour time to 12-hour time.