+ Post New Thread
Results 1 to 3 of 3
  1. #1
    Newbie level 1
    Points: 1,016, Level: 7

    Join Date
    Aug 2013
    Posts
    1
    Helped
    0 / 0
    Points
    1,016
    Level
    7

    Temperature and Humidity Indicator

    I am a new learner.

    I have built temperature and Humidity indicator using PIC 16F877a (LM35 +SH20).

    I Have following two problems.

    1) If I program to read only Temperature or only Humidity it shows correct.
    But when I select Temperature + Humidity - Both shows erratic reading ( RA1 and RA2).
    Request to suggest solution.
    2) When I am reading Temperature it hunts 27 - 27.5 - 29 - 27.5 etc - How to make it stable

    Thanks

    Vijay

    •   AltAdvertisment

        
       

  2. #2
    Super Moderator
    Points: 251,535, Level: 100
    Awards:
    1st Helpful Member

    Join Date
    Jan 2008
    Location
    Bochum, Germany
    Posts
    43,802
    Helped
    13318 / 13318
    Points
    251,535
    Level
    100

    Re: Temperature and Humidity Indicator

    I don't know what SH20 is. SHT20 is a digital sensor with I2C interface. In so far it's not clear how you connected the sensor. Please clarify, preferably show a schematic.



    •   AltAdvertisment

        
       

  3. #3
    Banned
    Points: 12,436, Level: 26

    Join Date
    Apr 2013
    Posts
    2,528
    Helped
    538 / 538
    Points
    12,436
    Level
    26

    Re: Temperature and Humidity Indicator

    Post your code. Mention which Compiler and what crystal frequency you are using.



--[[ ]]--