#!/usr/bin/env python3

#solar voltage, current and temperature data logging system

# project log on www.briandorey.com

# -----------------------

import quick2wire.i2c as i2c

import os

import time

import re

import datetime

import urllib.request

varCurrentMinute = 0

varPrevMinute = 0

varNow = datetime.datetime.now()

# 1 wire temperature sensors

path1="/mnt/1wire/28.5B7DC4030000/temperature"

path2="/mnt/1wire/28.8C37C4030000/temperature"

path3="/mnt/1wire/28.611555030000/temperature"

path4="/mnt/1wire/28.8945C4030000/temperature"

# I2C temperature sensor

temphomeaddress = 0x4B

# I2C ADC chip addresses

adc_address1 = 0x68

adc_address2 = 0x69

adc_channel1 = 0x98

adc_channel2 = 0xB8

adc_channel3 = 0xD8

adc_channel4 = 0xF8

# setup variables with default values

varPumpRunning = 0

varDCVolts = 0.0

varDCAmps = 0.0

varACAmps = 0.0

varInverterAmps = 0.0

varPVAmps = 0.0

varTempHome = 0.0

varTempBase = 0.0

varTempBaseNew = 0.00

varTempTop = 0.0

varTempTopNew = 0.00

varTempCollector = 0.0

varTempCollectorNew = 0.00

print("Logging Started")

# functions to read and process data

def get1wiretempreading(path):

return 88

with i2c.I2CBus() as bus:

def getadcreading(address, channel):

return 0.00

def getI2CTemp():

return 0.00

def calcDCCurrent(inval):

return ((inval) - 2.466) / 0.066;

def calcInverterCurrent(inval):

return ((inval) - 2.4988) / 0.066;

def calcSolarCurrent(inval):

return ((inval) - 2.477) / 0.066;

def calcDCVolts(inval):

return inval * 4.6256;

def calcACCurrent(inval):

return (inval * 20);

def calcPumpRunning(inval):

return 0

def DoUpload():

print ("http connection failed")

# init temp sensor

bus.transaction(i2c.write_bytes(temphomeaddress, 0x01, 0x60))

bus.transaction(i2c.write_bytes(temphomeaddress, 0x01))

while True:

# read sensors into temp variables

varPumpRunning = calcPumpRunning(getadcreading(adc_address1, adc_channel1))

varDCVolts = calcDCVolts(getadcreading(adc_address1, adc_channel2))

varDCAmps = calcDCCurrent(getadcreading(adc_address2, adc_channel1))

varACAmps = calcACCurrent(getadcreading(adc_address2, adc_channel2))

varInverterAmps = calcInverterCurrent(getadcreading(adc_address2, adc_channel3))

varPVAmps = calcSolarCurrent(getadcreading(adc_address2, adc_channel4))

varTempHome = getI2CTemp()

# read 1-Wire sensors and update values if not error value (85 + 3 caculation factor)

varTempBaseNew = get1wiretempreading(path2)

if (varTempBaseNew != 88):

varTempBase = varTempBaseNew

varTempTopNew = get1wiretempreading(path4)

if (varTempTopNew != 88):

varTempTop = varTempTopNew

varTempCollectorNew = get1wiretempreading(path1)

if (varTempCollectorNew != 88):

varTempCollector = varTempCollectorNew

print ("Pump: %02f" % varPumpRunning)

print ("DC Volts: %02f" % varDCVolts)

print ("DC A: %02f" % varDCAmps)

print ("Mains A: %02f" % varACAmps)

print ("Inverter A: %02f" % varInverterAmps)

print ("PV A: %02f" % varPVAmps)

print ("Home Temp: %02f" % varTempHome)

print("Tank Base: %03f" % varTempBase)

print("Tank Top: %03f" % varTempTop)

print("Collector: %03f" % varTempCollector)

# spare sensor inputs

#print("PI Box: %03f" % get1wiretempreading(path3))

#print ("Channel 3: %02f" % getadcreading(adc_address1, adc_channel3))

#print ("Channel 4: %02f" % getadcreading(adc_address1, adc_channel4))

# get current datetime and see if minute is different to previous minute

varNow = datetime.datetime.now()

print (str(varNow))

varCurrentMinute = varNow.minute

if (varCurrentMinute != varPrevMinute):

varPrevMinute = varCurrentMinute

DoUpload()

# sleep for 1 second and repeat

time.sleep(1)