ESP32 and RFID-RC522 module example

In this example we will connect an RFID-RC522 module and connect to an ESP32 Wemos LOLIN32 The microcontroller and card reader uses SPI for communication...

ESP32 and Soil Moisture Sensor example

In this article, we are going to interface a Soil moisture sensor with an ESP8266. This sensor measures the volumetric content of water inside...

ESP32 and microSD card example

In this example we connect an SD card to our ESP32, we will log analog readings to a file on the SD card. Here is...

ESP32 and Max6675 example

In this example we take a look at the MAX6675 Cold-Junction-Compensated K-Thermocouple-to-Digital Converter The MAX6675 performs cold-junction compensation and digitizes the signal from a type-K thermocouple....

ESP32 and MCP23017 flashy led example

The is a 16-bit, general purpose parallel I/O port expander for I2C bus applications. The 16-bit I/O port functionally consists of two 8-bit ports (PORTA...

ESP32 and I2C LCD example

In this example we will interface to an I2C LCD using our ESP32. Now these I2C LCD's consist of 2 parts usually an HD44780 16×2...

B4R and ESP32 MCP9808 digital temperature sensor example

MCP9808 digital temperature sensor example The MCP9808 digital temperature sensor converts temperatures between -20°C and +100°C to a digital word with ±0.5°C (max.) accuracy. The...

A B4R ESP32 HDC1008 temperature sensor example

The HDC1000 is a digital humidity sensor with integrated temperature sensor that provides excellent measurement accuracy at very low power. The device measures humidity...

A look at B4R and ESP32 development

B4R is a development tool that I had not heard of before until today, it is from the makers of basic4Android a development tool...

ESP32 and Infrared receiver example

In this example we look at how to connect an IR Reciever. Generally, they require Vcc(5v), GND and there is a data out which you connect...

ESP32 and 4067 led example

The 4067 was one of the IC's that I wanted to connect up to various microcontrollers as it looke dextremely useful, here is a quick...

ESP32 and 4051 LED example

The HCF4051 device is a monolithic integrated circuit fabricated in MOS (metal oxide semiconductor) technology available in SO-16 and PDIP-16 packages. The HCF4051 analog multiplexer/demultiplexer...