#!/bin/python3
# 03jan2021: (re)initial version

import adafruit_ads1x15.ads1015 as ADS
import board
import busio
import datetime
import os
import sys
import time

# init variables
term = str(os.environ.get('TERM'))
outfile = '/tmp/rmeter-ads1115.out'
systimer = '1'
syscount = '5'
if sys.argv[1:]: outfile = sys.argv[1]
if sys.argv[2:]: systimer = sys.argv[2]
if sys.argv[3:]: syscount = sys.argv[3]
systimer = int(systimer)
syscount = int(syscount)

# init board
from adafruit_ads1x15.analog_in import AnalogIn
i2c = busio.I2C(board.SCL, board.SDA)
ads = ADS.ADS1015(i2c)

# loop now
i = 0
while True:
    i = i + 1
    if term != 'None' and i > syscount: break
  # read values
    s1 = AnalogIn(ads, ADS.P0)
    s2 = AnalogIn(ads, ADS.P1)
    s3 = AnalogIn(ads, ADS.P2)
    s4 = AnalogIn(ads, ADS.P3)
    s1 = str(abs(round(s1.voltage, 2)))
    s2 = str(abs(round(s2.voltage, 2)))
    s3 = str(abs(round(s3.voltage, 2)))
    s4 = str(abs(round(s4.voltage, 2)))
  # build and write the line
    x = datetime.datetime.now()
    ctime = x.strftime('%H:%M:%S')
    lline = ctime + ' ' + s1 + ' ' + s2 + ' ' + s3 + ' ' + s4
    if term == 'None':
        f = open(outfile, 'a')
        f.write(lline + '\n')
        f.close()
    else: print(lline)    
  # sleep
    time.sleep(systimer)

if term != 'None':
   print ('')
   print ('usage: rmeter-ads1115 filename systimer syscounter')
   print ('')
   print ('-' * 70)
   print ('TIP: start the service: systemctl start ss-rmeter-ads1115.service')
   print ('       associated with: /etc/sysconfig/rmeter-ads1115')
   print ('-' * 70)

exit(0)