Wolles Elektronikkiste • Die wunderbare Welt der Elektronik

MicroPython – Switching from Arduino

This is a MicroPython crash course for people with Arduino/C++ experience. I use the ESP32 as the MCU and uPyCraft as the IDE.

ICM-20948 9-Axis Sensor Part II

This is the second part of my article about the 9-axis sensor ICM-20948. I continue with the presentation of my associated library.

ICM-20948 9-Axis Sensor Part I

I present the ICM-20948 9-axis sensor and my associated library. The ICM-20948 is the successor to the MPU-9250. This is Part 1.

Programming the ESP32 with Arduino Code

I introduce the ESP32 and its main features. In particular, I will discuss the differences to the Arduino (AVR) boards.

TVOC and eCO2 Sensors

Using the CCS811 and SGP30 as examples, I explain how metal oxide-based TVOC and eCO2 sensors work, how to drive them with libraries, and how reliable they are compared to NDIR CO2 sensors.

MH-Z14 and MH-Z19 CO2 Sensors

With CO2 sensors of the MH-Z14 and MH-Z19 series you can monitor the indoor air quality. I show how you how to control the sensors and I check their accuracy.

How to use the I2C interfaces of the ESP32

I will show you how to use the two I2C interfaces of the ESP32 and which requirements libraries of I2C components must have for this.

TCA9548A – I2C Multiplexer

I show you how to use up to eight I2C components with the same address with the I2C multiplexer TCA9548A. Alternatively, you can use MOSFETs as well for this purpose.

MPU9250 – 9-Axis Sensor Module – Part 2

This is part 2 of my article about the 9-axis sensor MPU9250 and my related library MPU9250_WE. I will explain how to measure angles and how to use interrupts, the cycle mode and FIFO.

MPU9250 – 9-Axis Sensor Module – Part 1

The MPU9250 is an accelerometer, gyroscope, magnetometer and thermometer. I present its technical characteristics and give an introduction to my library.