first commit

README.md

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+# m1s_ups_control

install_service.sh

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+#!/bin/bash
+
+mkdir -p /etc/m1s_ups/
+
+cp kill.sh /etc/m1s_ups/
+cp service.py /etc/m1s_ups/
+cp m1s_ups.service /etc/systemd/system/
+
+systemctl daemon-reload
+
+systemctl enable --now m1s_ups
+
+echo 'install sucess'

kill.sh

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+#!/bin/bash
+UPS_TTY_NODE=""
+VID_CH55xduino="1209"
+PID_CH55xduino="C550"
+function find_tty_node {
+	UPS_TTY_NODE=`find $(grep -l "PRODUCT=$(printf "%x/%x" "0x${VID_CH55xduino}" "0x${PID_CH55xduino}")" \
+					/sys/bus/usb/devices/[0-9]*:*/uevent | sed 's,uevent$,,') \
+					/dev/null -name dev -o -name dev_id  | sed 's,[^/]*$,uevent,' |
+					xargs sed -n -e s,DEVNAME=,/dev/,p -e s,INTERFACE=,,p`
+
+}
+
+function kill_dead_process {
+	PID=""
+	PID=`ps -eaf | grep ${UPS_TTY_NODE} | grep -v grep | awk '{print $2}'`
+	if [ -n "$PID" ]; then
+		kill -9 $PID
+	fi
+}
+
+find_tty_node
+
+kill_dead_process
+
+echo ${UPS_TTY_NODE}

m1s_ups.service

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+Description=Check the M1S_UPS status
+
+After=syslog.target
+
+[Service]
+Type=simple
+
+User=root
+
+# working directory
+WorkingDirectory=/etc/m1s_ups/
+ExecStart=python3 -u ./service.py
+
+[Install]
+WantedBy=multi-user.target

service.py

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+import serial
+import os
+import time
+import subprocess
+import pwmio
+import board
+import multiprocessing
+
+piezo = pwmio.PWMOut(board.D15, variable_frequency=True)
+piezo.duty_cycle = 0
+piezo.frequency = 523
+
+ups_loc = subprocess.check_output(['sudo','/bin/bash','kill.sh'])
+ups_loc = ups_loc.decode("UTF-8")
+ups_loc = ups_loc.replace("\n", "")
+ser = serial.Serial(ups_loc, 9600)
+
+def swr(a):
+    a = bytes(a, 'utf-8')
+    ser.write(a)
+    a = ser.readline().decode("UTF-8")
+    a = a.replace("\n", "")
+    a = a.replace("\r", "")
+    a = a.replace("#", "")
+    a = a.replace("@", "")
+    return(a)
+    
+prt = str()
+while True:
+    print("------------------------------------------------------")
+    print("------------------------------------------------------")
+    a = swr('@Fx#').replace("F","")
+    print("firmware ver ",a)
+    vol = swr('@V0#').replace("V","")
+    print("current voltage "+vol+"mV")
+    a = swr('@C0#').replace("","")
+    if a != "CF1C1":
+        piezo.duty_cycle = 0
+        print("Power Status Normal")
+    elif a == "CF0C0":
+        print("UPS !ERROR!")
+    else:
+        print("Power Loss Detect")
+        piezo.duty_cycle = 45000
+        if int(vol) <= 3600:
+            ser.write(b'@Px#')
+            os.system("shutdown now")
+    print("------------------------------------------------------")
+    print("------------------------------------------------------")
+    time.sleep(1)
+    piezo.duty_cycle = 0
+    time.sleep(1)