Active or passive buzzer for Arduino, ESP8266, NodeMCU, ESP32, etc.
Everything you need to know about connecting a buzzer to a NodeMCU, ESP8266 or Arduino
NodeMCU and Wemos D1 Mini
Connecting a BME280 sensor to ESPEasy
Temperature, humidity and atmospheric pressure easily and accurately.
Easy CO2 Meter with ESP8266 (NodeMCU) and Senseair S8 sensor
Why mount a CO2 meter with another sensor when you have this one?
Power from NodeMCU, Wemos Mini D1 and Arduino
What do we need to consider when powering external sensors and actuators?
Connecting and controlling WS2812B LEDs to ESP8266 with ESPEasy
Easily connect and control LEDs with your ESP8266 with ESP Easy.
Easily connect an SSD1306 OLED display (or two) to ESPEasy
Using an OLED display with ESP Easy is very easy. Here are the step-by-step instructions with video
Comparison CO2 sensors MH-Z19B vs Senseair S8
Here you will find the differences and similarities between the MH-Z19B and Senseair S8 CO2 sensors.
A home CO2 meter with Wifi against the coronavirus: The CO2 Easy
Easily build your own quality CO2 meter in an afternoon
CO2 meter with ESP8266
CO2 (carbon dioxide) is a dangerous gas for humans. In high concentrations it can cause dizziness, headache, high blood pressure, rapid heart rate, asphyxia and unconsciousness.