Wolles Elektronikkiste • Die wunderbare Welt der Elektronik

Wireless BBQ thermometer (433 MHz)

I will show you how to build a wireless 433 MHz BBQ thermometer with alert function and graphical display of the temperature curve.

Using WiFi with the ESP8266 and ESP32

I show you step by step how to network and control your ESP32 or ESP8266 boards via WLAN and how to exchange data between them.

SIM800L module

With the SIM800L, you can add mobile phone functions to your projects, e.g. make calls or send measured values via SMS and much more.

Strain gauges

With strain gauges you can measure the strain and bending of components. I’ll show you how to use them with the HX711 or op amps.

Programming the ESP32 with MicroPython

In this post, I show you how to program the ESP32 with MicroPython. I go into detail about the A/D converters, I2C, timers, RTC, touch pins, etc.

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.