ESP8266 and SHT40 layout

SHT40 Temperature & Humidity Sensor and ESP8266 example using the Arduino IDE

In this article we look at a SHT40 Temperature & Humidity Sensor and we will connect it to a Wemos Mini First lets look at...

Wemos Mini and a PCF8574

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...

Wemos and Barometric Pressure Shield example

In this article we look at a relatively new shield for the Wemos/Lolin products - this is a Barometric Pressure shield based on a HP303B. Here...

PAJ7620 gesture sensor and ESP8266

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

Wemos and reed switch example

The reed switch is an electrical switch operated by an applied magnetic field. It consists of a pair of contacts on ferrous metal reeds...

Wemos Mini and ISL29125 RGB color light sensor

On this page we take a look at the ISL29125 RED, GREEN and BLUE color light sensor The ISL29125 is a low power, high sensitivity, RED, GREEN...

MCP4725 Digital-to-Analog Converter example

MCP4725 is a single channel, 12-bit, voltage output Digital-to-Analog Converter with integrated EEPROM and an I2C Compatible Serial Interface. Again the easiest way to interface...

Wemos Mini DH11 shield example

I like the Wemos Mini and when I saw that there were some shields I decided to purchase some of them, in this first...

MAX30102 pulse and heart-rate monitor sensor and ESP8266

The MAX30102 is an integrated pulse oximetry and heart-rate monitor biosensor module. It includes internal LEDs, photodetectors, optical elements, and low-noise electronics with ambient...

Wemos and DHT Pro shield Micropython example

In this example we look at a DHT PRO example in Micropython for an ESP8266. Once again we use uPyCraft and again we use...

ESP8266 and MCP23017 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...

GA1A12S202 light sensor example

In this example we will connect a GA1A12S202 Log-Scale Analog Light Sensor to an Arduino. The features of this sensor are as follows Output voltage increases...

Wemos OLED shield example

In this example we look at another terrific little low cost shield for the Wemos mini, this time its the OLED shield. Lets look...

Wemos and TMP36 example

The TMP35, TMP36, and TMP37 are low voltage, precision centigrade temperature sensors. They provide a voltage output that is linearly proportional to the Celsius...

Max7219 8×8 LED matrix example

The MAX7219/MAX7221 are compact, serial input/output common-cathode display drivers that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph...

ESP8266 and bme280 temperature sensor example

The BME280 is a great new chip which was originally designed for the next generation of smartphones. It is made up of a very...