"""
MJRoBot Lab Temp Humidity Light RPi Station

Temperature/Humidity/Light monitor using Raspberry Pi, DHT11, and photosensor 
Data is displayed at thingspeak.com
2016/03/03
MJRoBot.org

Based on project by Mahesh Venkitachalam at electronut.in and SolderingSunday at Instructables.com

"""

# Import all the libraries we need to run
import sys
import RPi.GPIO as GPIO
import os
import time
from time import sleep
import Adafruit_DHT
import urllib2
import serial

ser = serial.Serial('/dev/ttyAMA0', 9600)


DEBUG = 1
# Setup the pins we are connect to
RCpin = 24 # yellow
DHTpin = 4 # orange

# set up of analog input via RC
a_pin = 25 #blue
b_pin = 23 #green


#Setup our API and delay
myAPI = "RJBXTHVR86D0CKZS"
myDelay = 15 #how many seconds between posting data

GPIO.setmode(GPIO.BCM)
GPIO.setup(RCpin, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
#GPIO.setup for sensor (pin 4) is defined inside Adafrut_DHT library

def getSensorData():
    RHW, TW = Adafruit_DHT.read_retry(Adafruit_DHT.DHT11, DHTpin)
    
    #Convert from Celius to Farenheit
    TWF = 9/5*TW+32
   
    # return dict
    return (str(RHW), str(TW),str(TWF))

def RCtime(RCpin):
    LT = 0
    
    if (GPIO.input(RCpin) == True):
        LT += 1
    return (str(LT))
  
def discharge():
    GPIO.setup(a_pin, GPIO.IN)
    GPIO.setup(b_pin, GPIO.OUT)
    GPIO.output(b_pin, False)
    time.sleep(0.005)

def charge_time():
    GPIO.setup(b_pin, GPIO.IN)
    GPIO.setup(a_pin, GPIO.OUT)
    count = 0
    GPIO.output(a_pin, True)
    while not GPIO.input(b_pin):
        count = count + 1
    return (str(count))

def analog_read():
    discharge()
    return charge_time()

def arduino_read():
    ser.write('r')
    ARDU = ser.readline()
    return (str(ARDU))
  
# main() function
def main():
    
    print 'starting...'

    baseURL = 'https://api.thingspeak.com/update?api_key=%s' % myAPI
    print baseURL
    
    while True:
        try:
            RHW, TW, TWF = getSensorData()
            LT = RCtime(RCpin)
            POT = analog_read()
            ARDU = arduino_read()
            
            f = urllib2.urlopen(baseURL + 
                                "&field1=%s&field2=%s&field3=%s" % (TW, TWF, RHW)+
                                "&field4=%s" % (LT)+
                                "&field5=%s" % (POT)+
                                "&field6=%s" % (ARDU))
            print f.read()
            
            print TW + " " + TWF+ " " + RHW + " " + LT+ " " + POT+ " " + ARDU
            f.close()
            

            sleep(int(myDelay))
        except:
            print 'exiting.'
            break

# call main"""
if __name__ == '__main__':
    main()