anda boleh melihat suhu CPU terus dari
Raspberry Pi dan memaparkannya pada LCD. Berikut ialah panduan langkah demi langkah:
Peralatan yang diperlukan:
1. Raspberry Pi
2. I2C LCD Display
3. Jumper wires (female to female)
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Step 1: Sambung I2C LCD ke Raspberry Pi
Power Off Raspberry Pi anda, Connect I2C LCD ke Raspberry Pi ikut pin ini:
VCC ke 5V (Pin 2 atau 4 Raspberry Pi)
GND ke GND (Pin 6 Raspberry Pi)
SDA ke SDA (Pin 3 Raspberry Pi)
SCL ke SCL (Pin 5 Raspberry Pi)
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Step 2: Enable I2C pada Raspberry Pi
1. Power on Raspberry Pi.
2. buka terminal.
3. Run `sudo raspi-config`.
4. Pergi ke Interfacing Options > I2C > Enable.
5. Reboot Raspberry Pi
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Step 3: Install Libraries
sudo apt update
sudo apt install -y i2c-tools
sudo apt install -y python3-smbus
sudo pip3 install RPLCD
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Step 4: Cari address I2C LCD
sudo i2cdetect -y 1
>>> 0x27<<<<
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Step 5: Python Script untuk baca Temperature dan Display pada LCD
nano cpu_temp_lcd.py
(paste semua code dibawah)
import os
import time
from RPLCD.i2c import CharLCD
# Initialize the LCD with the correct address
lcd = CharLCD('PCF8574', 0x27)
def get_cpu_temp():
res = os.popen('vcgencmd measure_temp').readline()
return res.replace("temp=","").replace("'C\n","")
try:
while True:
temp = get_cpu_temp()
lcd.clear()
lcd.write_string("CPU Temp: {}C".format(temp))
time.sleep(1)
except KeyboardInterrupt:
lcd.clear()
lcd.write_string("Goodbye!")
time.sleep(2)
lcd.clear()
save dan exit editor
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Step 6: Run Python Script
python3 cpu_temp_lcd.py
Paparan seperti gambar di bawah akan muncul, maka sukses.
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auto run temp lcd selepas reboot
sudo nano /etc/rc.local
tambah line dibawah sebelum line exit 0, contoh seperti di bawah:
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
_IP=$(hostname -I) || true
if [ "$_IP" ]; then
printf "My IP address is %s\n" "$_IP"
fi
# Run the Python script
sudo python3 /home/pi/cpu_temp_lcd.py &
exit 0
save dan exit editor
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sudo chmod +x /etc/rc.local
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sudo reboot
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selepas reboot dan raspi om, paparan suhu akan trus muncul pada lcd, jika gagal sila ulang semula step by step. semoga bermanfaat, 73
