Setting up a raspberry Pi with a dht22 sensor to automatically turn on a shower light. I can't seem to get the script to read the sensor, wait 5 seconds and read it again and then do stuff if the reading has changed. I am not a programmer and have mucked this together with help from friends and lots of google searches, but ultimately I have no clue what I am doing.
I have a script that turns the light on based on the humidity reading above X however as relative humidity changes the script is not as accurate as i would like.
import RPi.GPIO as GPIO
import Adafruit_DHT
sensor = Adafruit_DHT.DHT22
pin = 17
import time
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(7, GPIO.IN) #Read output from PIR motion sensor
time.sleep(2) #Waiting 2 seconds for the sensor to initiate
state=None
i=None
t2=None
t=None
d=5.0
while True:
#read humidity and store, wait 5 seocnds and read/store again
humidity, temperature = Adafruit_DHT.read_retry(sensor, pin) #takes reading from the sensor
t='{1:0.1f}'.format(temperature, humidity) #takes the humidity reading and commits to 'h'
time.sleep=5
humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
t2='{1:0.1f}'.format(temperature, humidity)
#if the second reading is 5 or more that the first set the state to 1
if t2 >= str(5.0+(float(t))):
state=1 #sets 'state' to 1 if the humidity is high
else:
#If the second reading is 3 less that the first set the state to 0
t2 <= str((float(t)-3.0))
state=0 #sets 'state' to 0 if humidity is not high
#storing state as 'i' and trying to do a check loop
if i == state: #state didn't change
print "holding", t, i
time.sleep(2)
#what to do if 'i' chnages
else:
i = state #if the states doesn't match set 'i' to equal 'state'
if i == 1: #what to do if 'state' is '1'
print "Showering",t,t2,i
time.sleep(2)
#end of curl
else: #what to do if 'state' is '0'
print "not showering",t,t2,i
time.sleep(2)
time.sleep(2)
Expected s it will keep printing the state based on changes
what I actually get is this:
sudo python humitest.py not showering 45.3 45.3 0 Traceback (most recent call last): File "humitest.py", line 67, in time.sleep(2) TypeError: 'int' object is not callable
import RPi.GPIO as GPIO
import Adafruit_DHT
sensor = Adafruit_DHT.DHT22
pin = 17
import time
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(7, GPIO.IN) #Read output from PIR motion sensor
time.sleep(2) #Waiting 2 seconds for the sensor to initiate
state=None
i=None
t2=None
t=None
d=5.0
while True:
#read humidity and store, wait 5 seocnds and read/store again
humidity, temperature = Adafruit_DHT.read_retry(sensor, pin) #takes reading from the sensor
t='{1:0.1f}'.format(temperature, humidity) #takes the humidity reading and commits to 'h'
#time.sleep=5 # This line is your problem. What are you trying to do?
humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
t2='{1:0.1f}'.format(temperature, humidity)
#if the second reading is 5 or more that the first set the state to 1
if t2 >= str(5.0+(float(t))):
state=1 #sets 'state' to 1 if the humidity is high
else:
#If the second reading is 3 less that the first set the state to 0
t2 <= str((float(t)-3.0))
state=0 #sets 'state' to 0 if humidity is not high
#storing state as 'i' and trying to do a check loop
if i == state: #state didn't change
print "holding", t, i
time.sleep(2)
#what to do if 'i' chnages
else:
i = state #if the states doesn't match set 'i' to equal 'state'
if i == 1: #what to do if 'state' is '1'
print "Showering",t,t2,i
time.sleep(2)
#end of curl
else: #what to do if 'state' is '0'
print "not showering",t,t2,i
time.sleep(2)
time.sleep(2)
The line time.sleep=5 is your problem. Why are you setting the attribute "sleep", which is normally a function, to the int 5? Did you mean time.sleep(5)? You get the error because you reassign the attribute "sleep" to 5, and then you try to invoke 5, as in 5(), later on when you do time.sleep(2) which of course it not valid.