37.19.221.52: Migrated reply #2953

2022-12-26T00:54:08Z

Migrated reply #2953

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Sorry, the code did not paste nicely when copied directly from Linux. I'll try again with a copy from windows.

#!/usr/bin/env python
import RPi.GPIO as GPIO
import time
import os
import datetime
import struct
import smbus
import sys

####################################
# Start Config
####################################

SHUTDOWN_TRIGGER = "All" # (AC Power,Capacity,Voltage,All) - determines what settings will trigger a shutdown.
AC_LOSS_WAIT_MINUTES = 15 # Number of minutes after power loss before shutdown is issued
CAPACITY_THRESHOLD = 50 # Shutdown will occur when capacity drops below the stated percentage
CAPACITY_STATUS_LOW = 20 # Low capacity warning below this level
VOLTAGE_THRESHOLD = 3.70 # Shutdown will occur when voltage drops below the stated percentage
VOLTAGE_STATUS_LOW = 3.50 # Low valtage warning below this level
TEST_MODE = "N" # (Y,N) - Will show extra output and will not perform shutdown when TEST_MODE = "Y", normal opperation TEST_MODE = "N"
BUZZER_ON = "N" # (Y,N) - BUZZER_ON = "Y" and buzzer will beep when power is initially lost and right before shutdown
BUZZER_SECONDS = 0.5 # Number of seconds the buzzer will sound

####################################
# End Config
####################################

WAIT_SECONDS = AC_LOSS_WAIT_MINUTES * 6
WAIT_STR = str(AC_LOSS_WAIT_MINUTES)

GPIO_PORT = 26
I2C_ADDR = 0x36

GPIO.setmode(GPIO.BCM)
GPIO.setup(GPIO_PORT, GPIO.OUT)

PLD_PIN = 6
BUZZER_PIN = 20
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(PLD_PIN, GPIO.IN)
GPIO.setup(BUZZER_PIN, GPIO.OUT)
GPIO.output(BUZZER_PIN, 0)
POWER_LOST_SEC = 0

def soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN):
if ( BUZZER_ON == "Y" ):
GPIO.output(BUZZER_PIN, 1)
time.sleep(BUZZER_SECONDS)
GPIO.output(BUZZER_PIN, 0)

def acPower(PLD_PIN):

AC_STATUS = "GOOD"
i = GPIO.input(PLD_PIN)
if ( i == 0 ):
AC_STATUS = "GOOD"
elif ( i == 1 ):
AC_STATUS = "LOST"
return AC_STATUS

def readVoltage(bus,VOLTAGE_STATUS_LOW):

address = I2C_ADDR
read = bus.read_word_data(address, 2)
swapped = struct.unpack("<H", struct.pack(">H", read))[0]
VOLTAGE = swapped * 1.25 /1000/16
VOLTAGE_STATUS = "Good"
if ( VOLTAGE <= VOLTAGE_STATUS_LOW ):
VOLTAGE_STATUS = "Low"
return VOLTAGE,VOLTAGE_STATUS

def readCapacity(bus,CAPACITY_STATUS_LOW):

address = I2C_ADDR
read = bus.read_word_data(address, 4)
swapped = struct.unpack("<H", struct.pack(">H", read))[0]
CAPACITY = swapped/256
CAPACITY_STATUS = "Good"
if ( CAPACITY >= 100 ):
CAPACITY_STATUS = "Full"
elif ( CAPACITY <= CAPACITY_STATUS_LOW ):
CAPACITY_STATUS = "Low"
return CAPACITY,CAPACITY_STATUS

def safeShutdown(GPIO_PORT):

GPIO.output(GPIO_PORT, GPIO.HIGH)
os.system('sudo shutdown -h now')
time.sleep(3)
GPIO.output(GPIO_PORT, GPIO.LOW)

bus = smbus.SMBus(1) # 0 = /dev/i2c-0 (port I2C0), 1 = /dev/i2c-1 (port I2C1)

now = datetime.datetime.now()
date_time = now.strftime("%m/%d/%Y, %H:%M:%S")

AC_STATUS = acPower(PLD_PIN)
VOLTAGE,VOLTAGE_STATUS = readVoltage(bus,VOLTAGE_STATUS_LOW)
CAPACITY,CAPACITY_STATUS = readCapacity(bus,CAPACITY_STATUS_LOW)

print ("******************************************")
print(date_time + " : System Startup")
print(date_time + " : AC Power " + AC_STATUS)
print(date_time + " : Battery Capacity " + CAPACITY_STATUS + " (" + str(round(CAPACITY,2)) + "%)" )
print(date_time + " : Battery Voltage " + VOLTAGE_STATUS + " (" + str(round(VOLTAGE,2)) + "V)" )
if ( TEST_MODE == "Y" ):
print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit after shutdown triggered.")

while True:

# print ("******************************************")

now = datetime.datetime.now()
date_time = now.strftime("%m/%d/%Y, %H:%M:%S")

AC_STATUS = acPower(PLD_PIN)
VOLTAGE,VOLTAGE_STATUS = readVoltage(bus,VOLTAGE_STATUS_LOW)
CAPACITY,CAPACITY_STATUS = readCapacity(bus,CAPACITY_STATUS_LOW)

if ( SHUTDOWN_TRIGGER == "AC Power" or SHUTDOWN_TRIGGER == "All" ):
if ( AC_STATUS == "GOOD" ):
if ( POWER_LOST_SEC > 0 ):
print(date_time + " : AC Power Restored - Shutdown cancelled")
POWER_LOST_SEC = 0
else:
if ( TEST_MODE == "Y" ):
print(date_time + " : AC Power " + AC_STATUS)
elif ( AC_STATUS == "LOST" ):
if ( TEST_MODE == "Y" ):
print(date_time + " : AC Power " + AC_STATUS)
POWER_LOST_SEC += 1
if ( POWER_LOST_SEC == 1 ):
print(date_time + " : AC Power Lost - Shutdown in " + str(AC_LOSS_WAIT_MINUTES) + " minutes")
soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN)
if ( POWER_LOST_SEC >= WAIT_SECONDS ):
print(date_time + " : Shutdown in progress due to AC power loss")
soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN)
if ( TEST_MODE != "Y" ):
safeShutdown(GPIO_PORT)
else:
print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit.")
break

if ( SHUTDOWN_TRIGGER == "Capacity" or SHUTDOWN_TRIGGER == "All" ):
if ( CAPACITY > CAPACITY_THRESHOLD ):
if ( TEST_MODE == "Y" ):
print(date_time + " : Battery Capacity " + CAPACITY_STATUS + " (" + str(round(CAPACITY,2)) + "%)" )
elif ( CAPACITY <= CAPACITY_THRESHOLD ):
print(date_time + " : Battery Capacity " + CAPACITY_STATUS + " (" + str(round(CAPACITY,2)) + "%)" )
print(date_time + " : Shutdown in progress due to battery Capacity below " + str(CAPACITY_THRESHOLD) + "% threshold")
soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN)
if ( TEST_MODE != "Y" ):
safeShutdown(GPIO_PORT)
else:
print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit.")
break

if ( SHUTDOWN_TRIGGER == "Voltage" or SHUTDOWN_TRIGGER == "All" ):
if ( VOLTAGE > VOLTAGE_THRESHOLD ):
if ( TEST_MODE == "Y" ):
print(date_time + " : Battery Voltage " + VOLTAGE_STATUS + " (" + str(round(VOLTAGE,2)) + "V)" )
elif ( VOLTAGE <= VOLTAGE_THRESHOLD ):
print(date_time + " : Battery Voltage " + VOLTAGE_STATUS + " (" + str(round(VOLTAGE,2)) + "V)" )
print(date_time + " : Shutdown in progress due to battery Voltage below " + str(VOLTAGE_THRESHOLD) + "V threshold")
soundBuzzer(BUZZER_ON,BUZZER_SECONDS,BUZZER_PIN)
if ( TEST_MODE != "Y" ):
safeShutdown(GPIO_PORT)
else:
print(date_time + " : Started in Test Mode, No actual shutdown will occur, program will exit.")
break

time.sleep(10)
GPIO.cleanup()

CommentStreams:A82bc30eddc86f48b1de40b45cd01686 - Revision history

37.19.221.52: Migrated reply #2953