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rpint.py
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rpint.py
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#!/usr/bin/env python3
# -*- coding:utf-8 -*-
#
# Author : Dariusz Kowalczyk
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License Version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# --- Functions ---
def shutdown():
from subprocess import check_call
check_call(['sudo', 'poweroff'])
def lldp():
import json
import subprocess
command = ('lldpcli show neighbors details -f json')
p = subprocess.Popen(command, universal_newlines=True,
shell=True, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
text = p.stdout.read()
retcode = p.wait()
lldp = json.loads(text)
lldp_len = len(lldp['lldp'])
if lldp_len != 0:
chassis = list(lldp['lldp']['interface']['eth0']['chassis'])[0]
descr = lldp['lldp']['interface']['eth0']['chassis'][chassis]['descr'].split()
mac = lldp['lldp']['interface']['eth0']['chassis'][chassis]['id']['value']
port = lldp['lldp']['interface']['eth0']['port']['id']['value']
auto_negotiation = lldp['lldp']['interface']['eth0']['port']['auto-negotiation']['current'].split()
vlan_id = lldp['lldp']['interface']['eth0']['vlan']['vlan-id']
power_supported = lldp['lldp']['interface']['eth0']['port']['power']['supported']
power_enabled = lldp['lldp']['interface']['eth0']['port']['power']['enabled']
redis_db.hset('LLDP', 'chassis', chassis)
redis_db.hset('LLDP', 'descr', str(descr[0]))
redis_db.hset('LLDP', 'mac', mac)
redis_db.hset('LLDP', 'port', port)
redis_db.hset('LLDP', 'auto_negotiation', str(auto_negotiation[0]))
redis_db.hset('LLDP', 'vlan_id', vlan_id)
redis_db.hset('LLDP', 'power_supported', str(power_supported))
redis_db.hset('LLDP', 'power_enabled', str(power_enabled))
redis_db.hset('LLDP', 'power_enabled', str(power_enabled))
else:
redis_db.hset('LLDP', 'chassis', '--')
redis_db.hset('LLDP', 'descr', '--')
redis_db.hset('LLDP', 'mac', '--')
redis_db.hset('LLDP', 'port', '--')
redis_db.hset('LLDP', 'auto_negotiation', '--')
redis_db.hset('LLDP', 'vlan_id', '--')
redis_db.hset('LLDP', 'power_supported', '--')
redis_db.hset('LLDP', 'power_enabled', '--')
redis_db.hset('LLDP', 'power_enabled', '--')
def serial_displays(**kwargs):
if kwargs['serial_display_type'] == 'lcd_st7735':
from luma.core.interface.serial import spi
from luma.core.render import canvas
from luma.lcd.device import st7735
from PIL import ImageFont
from time import sleep
# Load default font.
#font = ImageFont.load_default()
font = ImageFont.truetype('/home/pi/scripts/RPiNT/FreePixel.ttf', 15)
# Display width/height
width = 128
height = 128
# First define some constants to allow easy resizing of shapes.
padding = 0
top = padding
# bottom = height-padding
# Move left to right keeping track of the current x position for drawing shapes.
x = 0
display_rotate = 0
serial = spi(device=0, port=0, bus_speed_hz=8000000, transfer_size=4096, gpio_DC=25, gpio_RST=27)
try:
device = st7735(serial)
device = st7735(serial, width=128, height=128, h_offset=1, v_offset=2, bgr=True, persist=False, rotate=display_rotate)
while True:
# get data from redis db
lldp = redis_db.hgetall('LLDP')
chassis = lldp['chassis']
descr = lldp['descr']
mac = lldp['mac']
port = lldp['port']
auto_negotiation = lldp['auto_negotiation']
vlan_id = lldp['vlan_id']
power_supported = lldp['power_supported']
power_enabled = lldp['power_enabled']
battery_power = redis_db.get('battery_power')
# Draw
with canvas(device) as draw:
draw.text((x+38, top), str(descr) , font=font, fill="yellow")
draw.text((x+1, top+15), 'Name', font=font, fill="lime")
draw.text((x+40, top+15), str(chassis), font=font, fill="cyan")
draw.text((x+1, top+30), 'Port', font=font, fill="lime")
draw.text((x+40, top+30), str(port), font=font, fill="cyan")
draw.text((x+1, top+45), 'VLANid', font=font, fill="lime")
draw.text((x+56, top+45), str(vlan_id), font=font, fill="cyan")
draw.text((x+1, top+60), 'PowerSup', font=font, fill="lime")
draw.text((x+72, top+60), str(power_supported), font=font, fill="cyan")
draw.text((x+1, top+75), 'PowerEn', font=font, fill="lime")
draw.text((x+64, top+75), str(power_enabled), font=font, fill="cyan")
draw.text((x+1, top+90), 'mode', font=font, fill="lime")
draw.text((x+40, top+90), str(auto_negotiation), font=font, fill="cyan")
if bool(config['use_ups_hat']) is True:
draw.text((x+1, top+115), 'Power', font=font, fill="lime")
draw.text((x+42, top+115), str(battery_power)+'%', font=font, fill="cyan")
sleep(1/kwargs['serial_display_refresh_rate'])
except Exception as err:
print(err)
def threading_function(function_name, **kwargs):
import threading
t = threading.Thread(target=function_name, name=function_name, kwargs=kwargs)
t.daemon = True
t.start()
def db_connect(dbhost, dbnum):
import redis
import sys
from systemd import journal
try:
redis_db = redis.StrictRedis(host=dbhost, port=6379, db=str(dbnum), charset="utf-8", decode_responses=True)
redis_db.ping()
return redis_db
except:
error = f"Can't connect to RedisDB host: {dbhost}"
journal.send(error)
sys.exit(error)
def config_load(path_to_config):
import sys
from systemd import journal
try:
import yaml
with open(path_to_config, mode='r') as file:
config_yaml = yaml.full_load(file)
return config_yaml
except:
error = f"Can't load RPiNT config file: {path_to_config}"
journal.send(error)
sys.exit(error)
def ups_hat():
from INA219 import INA219
ina219 = INA219(addr=0x43)
while True:
bus_voltage = ina219.getBusVoltage_V() # voltage on V- (load side)
shunt_voltage = ina219.getShuntVoltage_mV() / 1000 # voltage between V+ and V- across the shunt
current = ina219.getCurrent_mA() # current in mA
power = ina219.getPower_W() # power in W
p = (bus_voltage - 3)/1.2*100
if(p > 100):p = 100
if(p < 0):p = 0
redis_db.set('battery_power', round(p))
def lldpd():
from time import sleep
while True:
lldp()
sleep(1)
def main():
from gpiozero import Button
from signal import pause
import sys
button = Button(21, hold_time=5)
print('')
print('# RPiNT is running #')
print('')
global redis_db
redis_db = db_connect('localhost', 0)
redis_db.flushdb()
config_yaml = config_load('/home/pi/scripts/RPiNT/rpint.yaml')
global config
config = config_yaml['setup']
lldp()
if bool(config['use_ups_hat']) is True:
threading_function(ups_hat)
if bool(config['use_serial_display']) is True:
threading_function(serial_displays, **config)
if bool(config['auto_lldp_read']) is True:
threading_function(lldpd)
else:
button.when_pressed = lldp
button.when_held = shutdown
pause()
# --- Main program ---
if __name__ == '__main__':
import pid
try:
with pid.PidFile('/home/pi/scripts/RPiNT/rpint.pid'):
main()
except KeyboardInterrupt:
print('')
print('# RPiNT is stopped #')
except pid.PidFileError:
print('')
print('Another instance of RPiNT is already running. RPiNT will now close.')
except Exception as err:
print(err)