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DHT21 and DHT22 Sensor Demos with AVR's Interrupt and Timer

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Author: Shawon Shahryiar

Last Updated: 2016-07-06

Package Version: 1.0.0.0

Category: Measurement

Downloaded: 1183 times

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License: MIT license  

These are demos of DHT21 and DHT22 relative humidity-temperature sensors using interrupt and timer of an AVR micro. Interrupt + timer based method don't block program sequence unlike polling methods and so the CPU can do other tasks. Falling edge interrupt is used to detect the output from the sensor and a timer detects pulse widths.

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DOWNLOAD LINK RELATED COMPILER CONTAINS
mikroC PRO for AVR
  • lib
  • src
  • exa
  • hlp
  • hex
  • sch
  • pcb
  • doc

Project Blog

Non-Polling DHT21 Sensor Demo

DHT21 Sensor Demo with AVR's Interrupt and Timer

Watch on YouTube

Non-Polling DHT22 Sensor Demo

DHT22 Sensor Demo with AVR's Interrupt and Timer

Watch on YouTube
Project Setup

Project Setup

DHT21 Sensor Demo with AVR's Interrupt and Timer

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DHT21 Sensor

DHT21 Sensor

DHT21 Sensor Demo with AVR's Interrupt and Timer

View full image
Project Setup

Project Setup

DHT22 Sensor Demo with AVR's Interrupt and Timer

View full image
DHT22 and Display

DHT22 and Display

DHT22 Sensor Demo with AVR's Interrupt and Timer

View full image

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