lcdOutput.py

import logging
import sys
import datetime
import time
import lcdCommands as lcd
import weatherData
import lcdDataFileUtils
import os

thisDir = os.path.dirname(os.path.realpath(__file__))
configFile = thisDir + "/config.json"
dataFile = thisDir + "/data.txt"

numMessages = 0
currTime = ""
wdDesc = ""
wdTempF = ""
date = ""
updateIteration = 0

def readDataFile():
    f = open(dataFile, 'r')
    firstLine = f.readline().strip()
    secondLine = f.readline().strip()
    return firstLine

def getTime():
    now = datetime.datetime.now()
    hour = int(now.strftime("%I"))
    period = now.strftime("%p").lower()
    timeStr = str(hour) + now.strftime(":%M") + period
    return timeStr

def getDate():
    now = datetime.datetime.now()
    dateStr = str(now.month) + "/" + str(now.day)
    return dateStr

logging.basicConfig(level=logging.DEBUG, filename="errors.txt")
try:
    myLCD = lcd.LCDDisplay()
    dataFileUtils = lcdDataFileUtils.LCDDataFileUtils(dataFile)
    while 1:
        try:
            if myLCD.isConnected():
                updateScreen = False
                # get time every 3 seconds
                nowTime = getTime()
                if (nowTime != currTime):
                    currTime = nowTime
                    updateScreen = True
                date = getDate()
                # get weather data every 90 seconds (960 times a day)
                if (updateIteration % 90 == 0):
                    updateIteration = 0
                    wd = weatherData.WeatherData()
                    if (wd.desc != wdDesc or wd.tempF != wdTempF):
                        wdDesc = wd.desc
                        wdTempF = wd.tempF
                        updateScreen = True
                # if there's a loop command the loop the referenced message
                loopMessage = dataFileUtils.getLoopCommandMessage()
                if (loopMessage != ""):
                    stopLoop = False
                    while(not(stopLoop)):
                        myLCD.clearScreen()
                        myLCD.scrollTextLeftOnLine(loopMessage, 1, 0.2)
                        stopLoop = dataFileUtils.isStopLoopCommandPresent()
                # if there's a show command the show the referenced message
                showMessage = dataFileUtils.getShowCommandMessage()
                if (showMessage != ""):
                    myLCD.clearScreen()
                    myLCD.scrollTextLeftOnLine(showMessage, 1, 0.2)
                # get and show number of messages between time and date
                num = dataFileUtils.getNumOfMessages()
                if (num != numMessages):
                    updateScreen = True
                    numMessages = num
                # only update the screen if there is data to update
                if (updateScreen):
                    myLCD.clearScreen()
                    if (numMessages > 0):
                        myLCD.displayWordAtPos(str(numMessages), 8)
                    myLCD.displayWordOnLine(currTime , 1)
                    myLCD.rightJustifyTextOnLine(date, 1)
                    myLCD.rightJustifyTextOnLine(wdDesc, 2)
                    myLCD.displayWordOnLine(str(int(round(wdTempF))) + chr(223), 2)
                updateIteration = updateIteration + 1
                time.sleep(1)
            else:
                print "establishing connection..."
                myLCD.getSerialConnection()
                time.sleep(10)
        except:
            print "Error writing to bluetooth"
            myLCD.disconnect()
except:
    logging.exception("ERROR: ")