wpa-ssid hentschel
wpa-psk bb78bbaa6a8425255774e5d49b51b4038d55c0c3e493334abbecec31c27096b6
* disable and remove connman, use standard resolv.conf
sudo systemctl disable connman
sudo systemctl stop connman
sudo apt remove connman
resolv.conf
<pre>
nameserver 192.168.1.2
search home.hentschel.net
</pre>
=== reset switch ===
P8, GPIO 67 <-> GND
* RasPi
GPIO 4<-> GND
=== install software ===
==== Raspberry Pi ====
sudo apt-get install build-essential python-dev python-setuptools python-pip python-smbus -y
sudo pip install Adafruit_GPIO
sudo pip install Adafruit_SSD1306
sudo apt-get install python-pil
sudo pip install gpiozero
sudo pip install psutil
also enable i2c in /boot/config.txt
dtparam=i2c_arm=on
==== BBB ====
sudo apt-get install build-essential python-dev python-setuptools python-pip python-smbus -y
sudo pip install Adafruit_GPIO
sudo pip install Adafruit_SSD1306
sudo apt-get install python-pil
sudo pip install gpiozero
sudo apt-get install psutil
=== enable systemd service ===
==== Raspberry Pi ====
* create file '''/lib/systemd/system/lcd.service''' with following content
<pre>
[Unit]
Description=LCD Display Service
After=multi-user.target
Conflicts=getty@tty1.service
[Service]
Type=simple
ExecStart=/usr/bin/python /home/pi/script/lcd/lcd.py
StandardInput=tty-force
[Install]
WantedBy=multi-user.target
</pre>
==== BBB ====
* create file '''/lib/systemd/system/lcd.service''' with following content
<pre>
[Unit]
Description=LCD Display Service
Wants=network.target
After=network.target
Conflicts=getty@tty1.service
[Service]
Type=simple
ExecStart=/home/thomas/script/lcd/lcd.py
StandardInput=tty-force
Restart=always
RestartSec=3
User=root
Group=root
[Install]
WantedBy=multi-user.target
</pre>
==== for all systems ====
sudo systemctl daemon-reload
sudo systemctl enable lcd.service
sudo systemctl start lcd.service
=== lcd + button script ===
==== Raspi ====
<pre>
#!/usr/bin/python
import time
import Adafruit_GPIO.SPI as SPI
import Adafruit_GPIO.GPIO as GPIO
import Adafruit_SSD1306
from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont
import subprocess
import socket
import psutil
import os
from gpiozero import CPUTemperature
from datetime import datetime
button_off = 4
gpio = GPIO.get_platform_gpio()
while True:
try:
gpio.setup(button_off, GPIO.IN, GPIO.PUD_UP)
button_oldstate = gpio.input(button_off)
#
RST = 0
#
disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST)
disp.begin()
disp.clear()
disp.display()
#
width = disp.width
height = disp.height
#
image1 = Image.new('1', (width, height))
draw = ImageDraw.Draw(image1)
draw.rectangle((0,0,width,height), outline=0, fill=0)
#
padding = -2
top = padding
#
bottom = height-padding
x = 0
font = ImageFont.load_default()
#
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.connect(("192.168.1.1", 80))
hostname = socket.gethostname()
ip = s.getsockname()[0]
firstline = ip + " " + hostname
#
while True:
time.sleep(1)
#
image1 = Image.new('1', (width, height))
draw = ImageDraw.Draw(image1)
draw.rectangle((0,0,width,height), outline=0, fill=0)
cputemp = CPUTemperature()
memstr = '{0: >5}'.format(str(int(psutil.virtual_memory().percent))) + "%|"
statvfs = os.statvfs('/')
disktotal = statvfs.f_frsize * statvfs.f_blocks # Size of filesystem in bytes
diskfree = statvfs.f_frsize * statvfs.f_bavail # Number of free bytes that ordinary users
diskpercent = round((disktotal - diskfree) * 100.0 / float(disktotal),0)
diskstr = 'SD:' + '{0: >3}'.format(str(int(diskpercent))) + "%"
now = datetime.now()
tempstr ='{0: >5}'.format(str(round(cputemp.temperature,))) + u"\u00b0" + "C|"
cpustr = '{0: >6}'.format(str(round(psutil.cpu_percent(),1))) + "%"
secondline = "CPU:" + tempstr + cpustr
thirdline = "MEM: " + memstr + diskstr
fourthline = now.strftime("%d/%m/%Y %H:%M:%S")
disp.clear()
draw.text((x, top), firstline, font=font, fill=255)
draw.text((x, top+8), secondline, font=font, fill=255)
draw.text((x, top+16), thirdline, font=font, fill=255)
draw.text((x, top+25), fourthline, font=font, fill=255)
disp.image(image1)
disp.display()
#
#
button_state = gpio.input(button_off)
if( button_state != button_oldstate ):
if( button_state ):
print("Button OFF")
else:
print("Button ON -> reboot")
disp.clear()
image1 = Image.new('1', (width, height))
draw = ImageDraw.Draw(image1)
draw.rectangle((0,0,width,height), outline=0, fill=0)
draw.text((x, top + 8), "Rebooting...", font=font, fill=255)
disp.image(image1)
disp.display()
os.system("reboot now")
# exit()
button_oldstate = button_state
#
#
except Exception as e:
print("LCD Error: %s" % str(e) )
</pre>
==== BBB ====
<pre>
#!/usr/bin/python
import time
import Adafruit_BBIO.SPI as SPI
import Adafruit_BBIO.GPIO as GPIO
import Adafruit_SSD1306
from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont
import subprocess
import socket
import psutil
import os
from gpiozero import CPUTemperature
from datetime import datetime
button_off = "P8_8"
while True:
try:
GPIO.setup(button_off, GPIO.IN, GPIO.PUD_UP)
button_oldstate = GPIO.input(button_off)
# BBB
RST = 'P9_12'
disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST, i2c_bus=2)
# Raspi
# RST = 0
# disp = Adafruit_SSD1306.SSD1306_128_32(rst=None)
disp.begin()
disp.clear()
disp.display()
#
width = disp.width
height = disp.height
#
image1 = Image.new('1', (width, height))
draw = ImageDraw.Draw(image1)
draw.rectangle((0,0,width,height), outline=0, fill=0)
#
padding = -2
top = padding
bottom = height-padding
x = 0
font = ImageFont.load_default()
#
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.connect(("192.168.1.1", 80))
hostname = socket.gethostname()
ip = s.getsockname()[0]
firstline = ip + " " + hostname
#
while True:
time.sleep(1)
#
image1 = Image.new('1', (width, height))
draw = ImageDraw.Draw(image1)
draw.rectangle((0,0,width,height), outline=0, fill=0)
# cputemp = CPUTemperature()
memstr = '{0: >5}'.format(str(int(psutil.virtual_memory().percent))) + "%|"
statvfs = os.statvfs('/')
disktotal = statvfs.f_frsize * statvfs.f_blocks # Size of filesystem in bytes
diskfree = statvfs.f_frsize * statvfs.f_bavail # Number of free bytes that ordinary users
diskpercent = round((disktotal - diskfree) * 100.0 / float(disktotal),0)
diskstr = 'SD:' + '{0: >3}'.format(str(int(diskpercent))) + "%"
now = datetime.now()
# tempstr ='{0: >5}'.format(str(round(cputemp.temperature,))) + u"\u00b0" + "C|"
tempstr = " |"
cpustr = '{0: >6}'.format(str(round(psutil.cpu_percent(),1))) + "%"
secondline = "CPU:" + tempstr + cpustr
thirdline = "MEM: " + memstr + diskstr
fourthline = now.strftime("%d/%m/%Y %H:%M:%S")
disp.clear()
draw.text((x, top), firstline, font=font, fill=255)
draw.text((x, top+8), secondline, font=font, fill=255)
draw.text((x, top+16), thirdline, font=font, fill=255)
draw.text((x, top+25), fourthline, font=font, fill=255)
disp.image(image1)
disp.display()
#
#
button_state = GPIO.input("P8_8")
if( button_state != button_oldstate ):
if( button_state ):
print("Button OFF")
else:
print("Button ON -> reboot")
disp.clear()
image1 = Image.new('1', (width, height))
draw = ImageDraw.Draw(image1)
draw.rectangle((0,0,width,height), outline=0, fill=0)
draw.text((x, top + 8), "Rebooting...", font=font, fill=255)
disp.image(image1)
disp.display()
os.system("reboot now")
# exit()
button_oldstate = button_state
#
#
except Exception as e:
print("LCD Error: %s" % str(e) )
</pre>