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This sensor module utilizes DHT11 as the sensitive component and has a bypass capacitor and a pull-up resistor on-board. The DHT11 is a pre-calibrated digital output temperature and humidity sensor. The single-wire wiring scheme makes it easy to be integrated to other applications. The simple communication protocol greatly reduces the programming effort required. Specification: Power supply voltage: 3.3~5.5V DC Output: the single bus digital signal Measuring range: 20-90%RH humidity, temperature 0~50° The measurement accuracy of +-5%RH: humidity, temperature +-2 ° Resolution: 1%RH humidity, temperature 1 ° Exchangeability: fully interchangeable Long term stability: < ± 1%RH Size: 28 * 12 * 7.2mm Interface Description: 1.VCC:External 3.3 V-5 V 2.GND:External GND 3.DO:Small board switch digital output interface, connect the microcontroller IO port Package Included: 5* DHT11 Module 5* Dupont Cable