#Measurements

How to handle a DHT22 sensor using ARM mbed OS?

Published at August 1, 2017 · Michał Żygowski ·  8 min read

Recently I have encountered with temperature and humidity measurements using DHT22 sensor. I was developing a driver source code in ARM mbed OS SDK on particular STM32 NUCLEO L432KC platform. Thorough analysis of DHT22 documentation led me to the following questions: Is it possible to accurately measure voltage-level durations during read process? What duration time values should be considered as timeout or/and error? Should I weaken the time restrictions in order to avoid random delays in voltage level transitions be considered as failure?...




Archives

2019 (7)
2018 (16)
2017 (12)
2016 (10)
2015 (8)
2014 (6)
2013 (14)
2012 (24)