It has been a while that I wanted to leverage the power of ESP-8266 NodeMCU to monitor my aquarium. My first experiment is to read the water temperature every x interval and upload it to ThingSpeak. For this experiment, I need: ESP-8266 NodeMCU; DS18B20 waterproof sensors, which I bought from Amazon; 4.7kΩ resistor. The setup … Continue reading Simple Aquarium Temperature Sensor