This module is controlled by esp-01/esp-01s, ds 18 b 20 is temperature sensor. Esp 8266 collector environment temperature up to server. 3.7v-12v dc (3.7v)。 Can be used as a temperature collection node, for smart homes or iot projects.

Characteristics:
::master control: Esp-01/esp-01s (This module does not include esp-01/esp-01s)
::thermohumidity sensors: Ds18b20
::working voltage: Dc 3.7v-12v (Support 3.7v lithium battery power supply)
::scope of measurement: - 55° c to + 125° c
::measurement accuracy: 0.5° c