DHT11 Temperature & Humidity Sensor features a temperature & humidity sensor complex with a calibrated digital signal output. By using the exclusive digital-signal-acquisition technique and temperature & humidity sensing technology, it ensures high reliability and excellent long-term stability. This sensor includes a resistive-type humidity measurement component and an NTC temperature measurement component, and connects to a high performance 8-bit microcontroller, offering excellent quality, fast response, anti-interference ability and cost-effectiveness

Although The DHT11 module has interface compatible with ESP-01 family, it can also be used with ESP8286 NodeMCU families 

Due to the proximity of components and how they are positioned in relation to the DHT11 module, you may see variations in the measures. Consider to keep your device in sleep mode while not using to minimize the variations.

Here is an firmware as example:

https://github.com/fullstackelectron/FSECanada_DHT11/tree/main/

What is in the package:
- DHT11 Module - 2 PCs