1st try
First temperature sensors which I tried to use D1 Mini ESP8266-based board with BME280 chip, which concept I gave up due high power consumption
2nd try
Tried to use Sonoff SNZB-02 ZigBee Temperature & Humidity Sensor. I've realized, that the sensor chip is absolutely inaccurate - temperature values accuracy and distribution was too big - and the humidity readings are totally out of range.
last try
Currently I use Xiaomi Mi Temperature and Humidity Monitor 2. Sensors are communicating via BLE. As a communication hub I use the Sonoff DUALR3 with Tasmota Bluetooth firmware.