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In this tutorial we will check how to obtain temperature measurements from a DHT22 sesnor using the ESP32, the Arduino core and timer interrupts. The tests were performed using a DFRobot’s ESP32 module integrated in a ESP32 development board, and a DFRobot DHT22 module. Introduction In this tutorial we will check how to obtain temperature measurements from a DHT22 sensor …
Continue reading "ESP32 Arduino: Getting DHT22 sensor measurements with interrupts"
In this tutorial we will check how to create a very simple alarm system with a buzzer and a PIR motion sensor. We will be using the Arduino core, running on the ESP32. The tests were performed using a DFRobot’s ESP32 module integrated in a ESP32 development board, and a DFRobot’s PIR sensor module. Introduction In this tutorial we …
Continue reading "ESP32 Arduino: Alarm with PIR motion sensor and buzzer"
In this tutorial we will check how to interact with a PIR motion sensor using an interrupt based approach, using the Arduino core running on the ESP32. The tests were performed using a DFRobot’s ESP32 module integrated in a ESP32 development board, and a DFRobot’s PIR sensor module. Introduction In this tutorial we will check how to interact with …
Continue reading "ESP32 Arduino: PIR motion sensor and interrupts"
The objective of this post is to explain how to use external pin interrupts on MicroPython running on the ESP32. The tests were performed using a DFRobot’s ESP-WROOM-32 device integrated in a ESP32 FireBeetle board. Introduction The objective of this post is to explain how to use external pin interrupts on MicroPython running on the ESP32. Please note …
The objective of this post is to explain how to handle external interrupts using the ESP32 and the Arduino core. The tests were performed on a DFRobot’s ESP-WROOM-32 device integrated in a ESP32 FireBeetle board. Introduction The objective of this post is to explain how to handle external interrupts using the ESP32 and the Arduino core. The tests were performed …
The objective of this post is to explain how to configure the DS3231 to generate an alarm interrupt every second, using the ESP8266. Introduction The objective of this post is to explain how to configure the DS3231 to generate an alarm interrupt every second, using the ESP8266. The code for this tutorial is almost the …
The objective of this post is to explain how to handle external interrupts with the ESP8266. Introduction The objective of this post is to explain how to handle external interrupts with the ESP8266, which will be a very useful tool when working with sensors. In a more formal definition, interrupts are events or conditions that …
How to create an internal representation of date and time in a microcontroller, using interruptions.
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