inital version

README.md

@@ -1,3 +1,37 @@
 # pyLCDInfo
 
-display current linux/network info on a 16x2 LCD via I2C
+display current linux/network info on a 16x2 LCD via I2C
+
+
+## Install
+
+`apt-get install i2c-tools pip python3-dev`
+
+`pip3 install rpi_lcd`
+
+search I2C LCD Controller on Bus X (0, 1, 2, 3, ...) and note address of device
+`i2cdetect -y X` 
+
+`nano /lib/systemd/system/LCDinfo.service`
+
+```
+[Unit]
+Description=LCD info
+After=syslog.target
+After=network.target
+
+[Service]
+Type=simple
+User=root
+Group=root
+Restart=on-failure
+RestartSec=5s
+ExecStart=sudo /usr/bin/nice -n 19 sudo -u root /usr/bin/python3 /root/pyLCDinfo.py eth0 wg0 /mnt/hdd/backups
+
+[Install]
+WantedBy=multi-user.target
+```
+
+`systemctl daemon-reload`
+
+`systemctl enable /lib/systemd/system/LCDinfo.service`

pyLCDinfo.py

@@ -0,0 +1,126 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+""" Author:                     Hendrik Schutter, mail@hendrikschutter.com
+    Date of creation:           2022/05/23
+    Date of last modification:  2022/05/23
+"""
+
+from rpi_lcd import LCD
+import netifaces as ni
+import subprocess
+import time
+import shutil
+import sys
+
+lcd = LCD(address=0x3f, bus=2, width=16, rows=2, backlight=True)
+
+def get_ip_addr(interfce_name):
+    return {
+        "ipv4": ni.ifaddresses(interfce_name)[ni.AF_INET][0]['addr'],
+        "ipv6": ni.ifaddresses(interfce_name)[ni.AF_INET6][0]['addr'] ,
+    }
+
+def get_wireguard_state(config_name):
+    try:
+        last_handshake_unix_timestamp = subprocess.check_output(f"wg show {config_name} latest-handshakes",
+                                             shell=True, stderr=subprocess.STDOUT)
+    except subprocess.CalledProcessError:
+        return False
+    return True
+
+def get_disk_usage(disk_path):
+    total, used, free = shutil.disk_usage(disk_path)
+    return str(format((free // (2**30))  / (total // (2**30)) * 100.0,'.2f')) + '%'
+  
+def get_uptime():
+    with open('/proc/uptime', 'r') as f:
+        uptime_seconds = float(f.readline().split()[0])
+        if (uptime_seconds >= (60.0*60.0*24.0)):
+            return str(format(uptime_seconds/(60.0*60.0*24.0),'.2f')) + ' days'
+        else:
+            return str(format((uptime_seconds/(60.0*60.0)),'.2f')) + ' hours'
+
+
+    return strftime("%H:%M:%S", gmtime(60*60*24))
+
+def main():
+
+    if len(sys.argv) != 4:
+        print("exiting due to few arguments")
+        exit(-1)
+
+    local_interface = sys.argv[1]
+    wireguard_interface = sys.argv[2]
+    disk_path = sys.argv[3]
+
+    #print(get_ip_addr(local_interface))
+    #print(get_wireguard_state(wireguard_interface))
+    #print(get_disk_usage(disk_path))
+    #print(get_uptime())
+
+    lcd.clear()
+    lcd.text(" Offsite Backup", 1)
+    lcd.text(" fckaf.de/FHA", 2)
+    time.sleep(2.0)
+
+    state_ok = False
+
+    while(True):
+        if state_ok == False:
+            lcd.backlight(turn_on=True)
+
+            lcd.clear()
+            lcd.text("Local IPv4:", 1)
+            lcd.text(get_ip_addr(local_interface)["ipv4"], 2, align='right')
+            time.sleep(2.4)
+            lcd.clear()
+            lcd.text("Local IPv6:", 1)
+            lcd.text(get_ip_addr(local_interface)["ipv6"][14:-1], 2, align='right')
+            time.sleep(2.4)
+            
+            lcd.clear()
+            lcd.text("Waiting for VPN", 1)
+
+            for loops in range(4):
+                for fill in range(14):
+                    if loops % 2 == 0: 
+                        lcd.text("<>".rjust(fill), 2, align='left')
+                    else:
+                        lcd.text("<>".ljust(fill), 2, align='right')
+                    time.sleep(0.1)
+                
+
+            if get_wireguard_state(wireguard_interface):
+                state_ok = True
+                lcd.clear()
+                lcd.text(" VPN  connected ", 1)
+                time.sleep(10.0)
+        else:
+            lcd.backlight(turn_on=False)
+     
+            lcd.clear()
+            lcd.text("Local IPv4:", 1)
+            lcd.text(get_ip_addr(local_interface)["ipv4"], 2, align='right')
+            time.sleep(5.0)
+            lcd.clear()
+            lcd.text("Local IPv6:", 1)
+            lcd.text(get_ip_addr(local_interface)["ipv6"][14:-1], 2, align='right')
+            time.sleep(5.0)
+            lcd.clear()
+            lcd.text("Free Disk:", 1)
+            lcd.text(get_disk_usage(disk_path), 2, align='right')
+            time.sleep(5.0)
+            lcd.clear()
+            lcd.text("System Uptime:", 1)
+            lcd.text(get_uptime(), 2, align='right')
+            time.sleep(5.0)
+
+            lcd.clear()
+            lcd.text(" VPN  Connected ", 1)
+            time.sleep(40.0) #sleep a lot to idle cpu
+
+            #check if wireguard is still connected
+            state_ok = get_wireguard_state(wireguard_interface)
+
+if __name__ == "__main__":
+    main()