Code to drive a DHT-22 temp/humidity sensor on a Node MCU ESP8266 dev board using the Adafruit.io dashboarding service for data feeds and graphing, with IFTTT.com for alerting.
Full setup tutorial at https://janetmartin.ca/2020/09/08/greenhouse-temperature-and-humidity-monitor/
Tutorial for the sensor at https://learn.adafruit.com/adafruit-io-basics-temperature-and-humidity/overview