FreeRTOS is a real-time system, with which multitasking can also be realized on relatively small MCUs. This article is an introduction to the topic, whereby I will limit myself to the ESP32 and the AVR-based Arduinos.
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Interrupts can be used to solve many challenges in microcontroller programming. However, there are also some stumbling blocks. This first part is about external interrupts.
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This is the second part of my article about the 9-axis sensor ICM-20948. I continue with the presentation of my associated library.
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In this article I will present the features of the real-time clock (RTC) DS3231 and how you can use it with the RTCLib library.
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The MPU6050 is a 6-axis gyroscope and accelerometer. I show you how to control it with and without a library and use its interrupt function.
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The VL6180X proximity and ambient light sensing module is introduced. I chose a library that allows you to easily use its functions, including interrupts.
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The TSL2561 measures light intensity from which lux values can be calculated. Its interrupt functions can be used with the Sparkfun library.
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The 16-bit I/O port expander MCP23017 is introduced including a library. The functions are explained by sketches and circuits.
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