Difference: Lecture8:DHT11TemperatureAndHumiditySensor (6 vs. 7)

Revision 72023-11-19 - UliRaich

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Start Presentation

Slide 1: DHT11 Temperature and Humidity Sensor

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Reading and understanding the data sheet

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<		Let’s have a look at the DHT11 data sheet:
>
>		Let’s have a look at the DHT11 data sheet:
  Most of the following information is just a copy from the data sheet.
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  • We must pull it high again and wait for another 20-40 μs
  • Finally we must re-program the pin as input and wait for the DHT11 to respond.

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<

Response from DHT11response.png

>
>

Response from the DHT11

response.png

 

A zero bit

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 Let's start slowly:
  • Initiating a measurement seems do-able
  • Why not just read the data from the device every 5 µs
    and print out the information?
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<		The zeros and ones do not look too convincing.
Let’s save those onto a file and look at it with gnuplot
---++
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>		The zeros and ones do not look too convincing.

 

What the user of the device wants

The user of the device would like to have a library which hides

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  It creates html of latex doc
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<		%SLIDESHOWEND%
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>
%SLIDESHOWEND%
  -- Uli Raich - 2017-10-20

Comments

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META FILEATTACHMENT attachment="connections.png" attr="" comment="" date="1508516877" name="connections.png" path="connections.png" size="43672" user="uli" version="1"
META FILEATTACHMENT attachment="dht11Intro.png" attr="" comment="" date="1508516877" name="dht11Intro.png" path="dht11Intro.png" size="27160" user="uli" version="1"
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