1. dht11 라이브러리 추가

https://github.com/unims77/odroid_c1_dht11

2. lcd.py 개발

import lcddriver as lcd
from time import time
from time import sleep
from datetime import datetime
import sys

import odroid_wiringpi as wpi
import odroid_dht11 as dht11

wpi.wiringPiSetup()

lcd_bus = 1
dht_pin = 7

led_pin = 4
fan_pin = 5

GPIO_HIGH = 1
GPIO_LOW  = 0

GPIO_IN   = 0
GPIO_OUT  = 1

# init lcd
lcd = lcd.lcd(lcd_bus)

temp = 0
humi = 0

#lcd.display_string("2022-05-31 11:22:33", 1)
#lcd.display_string("LED  ON,   FAN ON", 1)
#lcd.display_string("TEMP 14 C, HUD 90 %", 2)

def displayGpio():
    ledStr = "OFF";
    fanStr = "OFF";
    ledStatus = wpi.digitalRead(led_pin)
    if ledStatus == 1:
       ledStr = "ON";

    fanStatus = wpi.digitalRead(fan_pin)
    if fanStatus == 1:
        fanStr = "ON";

    print("LED :",ledStr)
    print("FAN :",fanStr)

    lcd.display_string("LED  %-3s  FAN  %-3s" % (ledStr, fanStr), 1)

def displayDht11():
   global temp
   global humi
   # read data using pin 14
   instance = dht11.DHT11(pin = dht_pin)
   result = instance.read()

   if result.is_valid():
      temp = int(result.temperature)
      humi = int(result.humidity)
      print("TEMP :",temp)
      print("HUMI :",humi)

   lcd.display_string("TEMP %-2dC  HUMI %-2d%%" % (temp, humi), 2)

while True:
  try:
     displayGpio()
     displayDht11()

     timeString = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
     lcd.display_string(timeString, 4)
     sleep(1)
  except:
    print("error")

3. 구동 쉘 개발 lcd.sh

#~/bin/sh

pkill -9 -f "python3 /sw/lcd/lcd.py"
cd /sw/lcd
nohup python3 /sw/lcd/lcd.py &

4. 구현 결과