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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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