Add UPS functionality
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bmspy-ups.service
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13
bmspy-ups.service
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[Unit]
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Description=UPS monitoring for BMS
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Requires=bmspy-server.service
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[Service]
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Type=exec
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WorkingDirectory=/usr/local/bmspy
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ExecStart=poetry run bmspy-ups
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RestartSec=5
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Restart=on-failure
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[Install]
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WantedBy=default.target
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bmspy/ups.py
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bmspy/ups.py
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from collections import deque
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import argparse
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import atexit, datetime, os, re, sys, time
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import smtplib, ssl, socket
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from bmspy import client
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DAEMON_UPDATE_PERIOD = 30
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scheduled_shutdown = False
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critical_sent = False
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warning_sent = False
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alert_sent = False
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def handle_shutdown(action = 'cancel', delay = 0, debug = 0):
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global scheduled_shutdown
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if action == 'shutdown':
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if scheduled_shutdown is False:
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scheduled_shutdown = time.time() + delay * 60 * 1000
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os.system("/sbin/shutdown {}".format(delay))
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elif action == 'cancel':
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os.system("/sbin/shutdown -c")
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return
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def handle_email(text, level, recipient = "root", mailserver = "localhost", port = 25, mailuser = None, mailpass = None, debug = 0):
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isSSL = False
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hostname = socket.gethostname()
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if re.match("/@/", recipient) is None:
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recipient = "{}@{}".format(recipient, hostname)
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sender = "bmspy on {} <nobody@{}>".format(hostname, hostname)
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if port == 465 or port == 587:
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isSSL = True
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if level is not None:
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msg = "From: {}\r\nTo: {}\r\nSubject: {} from BMSPY UPS on {}\r\n\r\n{}\r\n".format(sender, recipient, level, hostname, text)
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if isSSL:
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context = ssl.create_default_context()
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with smtplib.SMTP(mailserver, port) as server:
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if isSSL:
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server.starttls(context=context)
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server.ehlo()
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if mailuser is not None and mailpass is not None:
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server.login(mailuser, mailpass)
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server.sendmail(sender, recipient, msg)
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return
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def main():
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global alert_sent, warning_sent, critical_sent
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parser = argparse.ArgumentParser(
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description='Query JBD BMS and alert or shutdown when certain thresholds are reached',
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add_help=True,
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)
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parser.add_argument('--alert', '-a', dest='alert', action='store_true',
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default=True, help='Email an alert when UPS detects A/C loss (default: true)')
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parser.add_argument('--warning', '-w', dest='warning_threshold', action='store', type=int,
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default=75, help='Email an alert when remaining capacity percentage drops below this figure (default: 75)')
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parser.add_argument('--critical', '-c', dest='critical_threshold', action='store', type=int,
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default=30, help='Shut system down when remaining capacity percentage drops below this figure (default: 30)')
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parser.add_argument('--delay', '-d', dest='shutdown_delay', action='store', type=int,
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default=5, help='Delay system shutdown (default: 5 minutes)')
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parser.add_argument('--mailserver', '-m', dest='mailserver', action='store',
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default="localhost", help='Mail server (default: localhost)')
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parser.add_argument('--port', '-p', dest='port', action='store',
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default=25, help='Mail server port (default: 25)')
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parser.add_argument('--user', dest='mailuser', action='store',
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default=None, help='Mail server user')
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parser.add_argument('--pass', dest='mailpass', action='store',
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default=None, help='Mail server password')
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parser.add_argument('--to', '-t', dest='recipient', action='store',
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default="root", help='Email recipient (default: root)')
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parser.add_argument('--socket', '-s', dest='socket', action='store',
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default='/run/bmspy/bms', help='Socket to communicate with daemon')
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parser.add_argument('--verbose', '-v', action='count',
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default=0, help='Print more verbose information (can be specified multiple times)')
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args = parser.parse_args()
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debug = args.verbose
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print("Running BMS UPS daemon on socket {}".format(args.socket))
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client.handle_registration(args.socket, 'ups', debug)
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atexit.register(client.handle_registration, args.socket, 'ups', debug)
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history = deque()
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while True:
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data = client.read_data(args.socket, 'ups')
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history.append(data)
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# Remove the oldest data from the history
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while len(history) > 10:
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history.popleft()
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if len(history) > 3:
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comparison_1 = history[1]
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comparison_2 = history[2]
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comparison_3 = history[3]
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else:
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if debug > 1:
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print("Not enough readings, sleeping...")
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time.sleep(DAEMON_UPDATE_PERIOD)
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continue
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current_amps = float(data['bms_current_amps']['raw_value'])
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charge_ratio = float(data['bms_capacity_charge_ratio']['raw_value']) * 100
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comparison_1_current_amps = float(comparison_1['bms_current_amps']['raw_value'])
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comparison_1_charge_ratio = float(comparison_1['bms_capacity_charge_ratio']['raw_value']) * 100
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comparison_2_current_amps = float(comparison_2['bms_current_amps']['raw_value'])
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comparison_2_charge_ratio = float(comparison_2['bms_capacity_charge_ratio']['raw_value']) * 100
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comparison_3_current_amps = float(comparison_3['bms_current_amps']['raw_value'])
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comparison_3_charge_ratio = float(comparison_3['bms_capacity_charge_ratio']['raw_value']) * 100
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if debug > 1:
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print("current: {:>3.2f}A\ncapacity remaining: {:>4.0f}%".format(current_amps, charge_ratio))
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if charge_ratio <= args.critical_threshold and \
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comparison_1_charge_ratio <= args.critical_threshold:
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if debug > 0:
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print("Below critical threshold, shutting down")
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handle_shutdown(action = 'shutdown', delay = args.shutdown_delay, debug = debug)
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if critical_sent is False:
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handle_email(text = "remaining capacity below {}%, shutting down".format(args.critical_threshold),
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level = "Critical alert",
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recipient = args.recipient,
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mailserver = args.mailserver,
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port = args.port,
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mailuser = args.mailuser,
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mailpass = args.mailpass,
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debug = debug)
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critical_sent = True
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elif charge_ratio <= args.warning_threshold and \
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comparison_1_charge_ratio <= args.warning_threshold:
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if debug > 0:
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print("Below warning threshold")
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if warning_sent is False:
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handle_email(text = "remaining capacity below {}%".format(args.warning_threshold),
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level = "Warning",
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recipient = args.recipient,
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mailserver = args.mailserver,
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port = args.port,
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mailuser = args.mailuser,
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mailpass = args.mailpass,
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debug = debug)
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warning_sent = True
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# Current needs to be negative for two consecutive reads
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elif args.alert and current_amps < 0 and \
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comparison_1_current_amps < 0 and \
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comparison_2_current_amps >= 0:
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if debug > 0:
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print("Alert: discharging!")
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if alert_sent is False:
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handle_email(text = "power lost", level = "Power loss alert",
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recipient = args.recipient,
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mailserver = args.mailserver,
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port = args.port,
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mailuser = args.mailuser,
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mailpass = args.mailpass,
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debug = debug)
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alert_sent = True
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# Current needs to be zero or positive for two consecutive reads
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elif args.alert and current_amps >= 0 and \
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comparison_1_current_amps >= 0 and \
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comparison_2_current_amps < 0:
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if debug > 0:
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print("Alert: power regained!")
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handle_shutdown(action = 'cancel', debug = debug)
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handle_email(text = "power regained", level = "Recovery alert",
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recipient = args.recipient,
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mailserver = args.mailserver,
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port = args.port,
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mailuser = args.mailuser,
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mailpass = args.mailpass,
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debug = debug)
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critical_sent = False
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warning_sent = False
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alert_sent = False
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time.sleep(DAEMON_UPDATE_PERIOD)
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if __name__ == "__main__":
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main()
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@ -25,4 +25,5 @@ bmspy = "bmspy:main"
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bmspy-server = "bmspy.server:main"
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bmspy-influxdb = "bmspy.influxdb:main"
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bmspy-prometheus = "bmspy.prometheus:main"
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bmspy-ups = "bmspy.ups:main"
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bmspy-usbd = "bmspy.usbhid:main"
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