ESP32 and DS3231 RTC example

The DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery...

ESP32 and IR Line tracking sensor example

This is another example using a sensor from the 37 sensor kit, this time we use the one called the KY-033 Hunt sensor module. A...

Using SHA-256 with an ESP32

In this example we will look at how you can generate the hash of a string using the SHA-256 algorithm. We will use the...

HDC2080 humidity and temperature sensor connected to a ESP32

In this article we look at yet another humidity and temperature sensor from TI - this time its the HDC2080 which we will connect...

ESP32 and a L3GD20 sensor example

The L3GD20 is a low-power three-axis angular rate sensor. It includes a sensing element and an IC interface capable of providing the measured angular rate...

ESP32 and a PCF8574 expander example

The PCF8574 is an 8 bits I/O port expander that uses the I2C protocol. Using this IC, you can use only the SDA and...

ESP32 and L9110 fan module example

In this example we connect an ESp8266  to a dual L9110 fan module. This is a commonly found, basic low cost module which consists...

PAJ7620 gesture sensor and ESP32

The PAJ7620 integrates gesture recognition function with general I2C interface into a single chip forming an image analytic sensor system. It can recognize 9...

BH1745NUC Luminance and Colour Sensor and Wemos Lolin32 example

In this article we look at a BH1745NUC Luminance and Colour Sensor and connect it to an Wemos Lolin32 The BH1745NUC is digital color sensor...