ESP32 Built-in OLED – Heltec WiFi Kit 32
An introduction and set-up for the Heltec Automation WiFi Kit 32 development board with OLED display. Follow the steps below to have the example WiFiScan script show your local…
Arduino Uno with NEO GPS and OLED
This project displays the latitude and longitude from a GPS sensor on an OLED display using the I2C protocol. In the video below you can see a splash screen is displayed with some…
PIR Movement Detector with a 3v Mosfet Relay
The 3.3v output from a PIR movement detector doesn’t have enough current to energise a mechanical relay. With a little modification it is possible to make it work with a…
ESP8266 with two BME280 Sensors over SPI
I had a problem with the wiring on this one. With SPI you use the same pins for SCLK (SCL pin on the BME280 boards) , MOSI (SDA pin) and MISO (SDO pin) and then each SPI sensor…
ESP8266 and BME280 Temp, Pressure and Humidity Sensor over SPI
As part of a bigger project to measure temperature and humidity I’ve set up the NodeMcu ESP8266 (ESP12E) with a GY BME280 as below. I’m using ‘Software’…