Medium Precision Temperature and Humidity Sensor DHT11 with 1-Wire Data Bus, for ESP-01 ESP8266 platform.
Aosong DHT11 is a calibrated, integrated humidity and temperature sensor, communicating to a micro controller over only 1 digital I/O pin.
The sensor provides 16bit resolution, takes only about 0.3mA (0.06mA in standby), and needs a power supply in the range of 3.7 to 12V (lithium battery for example). The sensor connects straight to an ESP-01 WiFi module.
Library and example code for Arduino etc. is widely available. Sample Time min. 2s.