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#Stm32


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?...

Categories: firmware iot


Zephyr initial triage on Nucleo-64 STM32F411RE

Published at January 14, 2017 · Piotr Król ·  7 min read

As I mention in previous post Zephyr RTOS is an interesting initiative started by Intel, NXP and couple other strong organizations. With so well founded background future for this RTOS should look bright and I think it will quickly became important player on IoT arena. Because of that it is worth to dig little bit deeper in this RTOS and see what problems we faced when trying to develop for some well known development board....

Categories: firmware iot