SHT20 temperature and humidity sensor and ESP8266
The SHT2x series consists of a low-cost version with the SHT20 humidity sensor. the SHT2x provides calibrated, linearized sensor signals in digital, I2C format....
Wemos 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...
L3G4200D three-axis gyroscope and ESP8266 example
In this example we connect a L3G4200D three-axis gyroscope module to a Wemos Mini - you can of course use any ESP8266 based board...
Wemos and LX1972 light sensor example
The LX1972 is a low cost silicon light sensor with spectral response that closely emulates the human eye. Patented circuitry produces peak spectral response...
Wemos Infrared receiver example
In this example we look at how to connect an IR Reciever. Generally, they require Vcc(5v) but I found this to work well with 3v3, GND...
VEML6070 ultraviolet light sensor and ESP8266
In this example we look at an VEML6070 UV sensor and connect it to an Arduino UNO
VEML6070 is an advanced ultraviolet (UV) light sensor...
ESP8266 and DS1624 sensor example
The DS1624 consists of two separate functional units: a 256-byte nonvolatile E2 memory and a direct-to-digital temperature sensor.
The nonvolatile memory is made up of...
Wemos Mini and LIS3MDL magnetic field sensor example
In this article we look at another sensor - this time its the LIS3MDL which is a 3-axis MEMS magnetic field sensor, digital output,...
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...
TLV493D magnetic sensor and ESP8266 example using the Arduino IDE
In this article we look at a TLV493D magnetic sensor and we will connect it to a Wemos Mini
First lets look at the sensor
The...
MPL3115A2 pressure sensor and ESP8266
The MPL3115A2 is a compact, piezoresistive, absolute pressure sensor with an I2C digital interface. MPL3115A2 has a wide operating range of 20 kPa to...
Wemos Mini and I2C LCD example
Sometimes a nice big LCD is useful for your projects, in this example we will interface to an I2C LCD using our ESP32. Now...
ESP8266 and SHT21 humidity and temperature sensor example
SHT21, the new humidity and temperature sensor of Sensirion is about to set new standards in terms of size and intelligence: Embedded in a...
The Wemos PIR shield
A new wemos shield and this time its based on a passive infrared sensor
An overview of a PIR
A passive infrared sensor (PIR sensor) is...
Wemos and MAG3110 magnetometer
Freescale’s MAG3110 is a small, low-power, digital 3-axis magnetometer. The device can be used in conjunction with a 3-axis accelerometer to realize an orientation...
A look at various ESP specific APIs
Description
Some ESP-specific APIs related to deep sleep, RTC and flash memories are available in the ESP object. These may be useful, we have already...