DHT11 Humidity Temperature Monitor on ThingSpeak with NodeMCU Objective: It explains how to log Humidity & Temperature data on the cloud. We can use Thingspeak as a cloud service provider and DHT11 to measure temperature and humidity. Requirement: NodeMCU ESP8266 Board, DHT11 humidity and temperature sensor, Connecting Wires, Breadboard Theory DHT11 Humidity & Temperature Sensor: The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin (no analog input pins needed). It’s fairly simple to use but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds,